The New 2023 BMW M4 CSL

The question is, what does BMW do or stands for in today’s world? In short many – many things, please let me explain.

Bayerische Motoren Werke (BMW) has some well known innovations like mold injected carbon fiber polymer which had its first commercial use in the BMW E46, BMW M3 CSL . The CSL (Competition Sport Light weight) is only used twice in the brands history.

2023 BMW M4 CSL

The third one has been just announced which is going to be the 2023 BMW M4 CSL, production starts on 07/2022. The very first one was the 1972 homologation special BMW 3.0 CSL which later became the “batmobile”.

The New 2023 M4 CSL

The second iteration BMW M3 CSL was introduced in 2003, the BMW E46 with a carbon fiber roof in the first time in a production vehicle. The technology to produce carbon fiber of anything is not new albeit the polymer reinforced carbon fiber is a BMW invention entirely.

Regular or conventional carbon fiber has to be made from scratch of carbon fiber sheets which could be plain or pre preg. Either way it has to be placed or hand laid into a mold. After has to be soaked in epoxy resin, then this has to be repeated multiple times, until the layers reach a desired thickness within the mold.

Thereafter the entire soaked mold has to be covered in a special sheet of absorbent material, which has to soak up the excess resin to make the component lighter. Then the entire mold has to be covered in a vacuum bag and sealed entirely while there are sealed ports are attached to the bag so there is a vacuum ( negative air pressure) can be applied.

The negative pressure is a must, in order to extract any air bubbles from the carbon fiber epoxy resin.  Additionally the entire process has to be performed while the component is baked over night in a autoclave (a giant oven) which will cure the epoxy resin over time of 6hours or more.  BMW figured this process is way too expensive and time consuming, therefore they came up with a clever way to make the desired components in 20 minutes or less.

The BMW’s Way of Making Carbon Fiber Roof Takes 20 Minutes

The BMW’s way of making the carbon fiber roof has been, make 2 molds one positive and one negative mold. Layer up (5 layers for the roof in question) the carbon fiber sheets in different direction.  Press the carbon fiber sheet between the molds and then pre heat the molds and finally inject a polymer resin to solidify the the carbon fiber cloth.

The entire process takes about 20 minutes or less instead of days with conventional hand laid epoxy resin. The first carbon fiber roof was installed on the famous limited edition 2003 M3 CSL to bring down the center of gravity of the vehicle.

Which Brings Us Back To The  2023 BMW M4 CSL

This process opened a new era in fast and reasonably priced carbon fiber components. Therefore BMW could make the BMW i3 and the BMW i8 cars mostly constructed from the same material on a normal production line. Which brings us back to the  2023 BMW M4 CSL ( limited to one thousand piece World wide) which has multiple panels made from the same lightweight but strong (5 times as strong as steel) carbon fiber.  For instance, the roof the hood and the trunk all made of the same material to lower the center of gravity. This all played a role to earn the L  (Leicht in German = lightweight in English) designation by removing a hundred kilogram of weight from the vehicle.

Naturally even the standard seats are made of carbon fiber as well .

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2023 BMW M4 CSL

The new 2023 BMW M4 CSL

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How to Prepare Your Car for Extreme Cold

What do you do when your kid decides to move the arctic circle to pursue his passion? Well, if you are like me, you build a car suitable for the conditions. Meaning extreme cold extreme environment and everything else in the extremes regarding the weather so to say.

Suitable Car To The Arctic Circle

We searched first for a suitable car to modify and build. He wanted to get an older Subaru Forester or Outback.  Finally we found a  decent Outback, with a standard transmission and the modifications began.

Step one: Applied heavy undercoating everywhere to lock out moisture as these cars are prone to rust. We added a charge port to the front for the block heater, a battery warmer and additionally a extreme cold weather approved CTEK battery tender.

Lightweight Synthetic Transmission Fluid

Then we replaced all the fluids with lightweight synthetic gear, transmission fluid, synthetic power steering fluid, new spark plugs and all the filters. Also replaced the serpentine belt, the engine coolant adjusted to -50 C.

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Synthetic Motor Oil

Performed an oil change on the engine too, with lightweight 0/20 w synthetic motor oil. New wipers approved for cold weather by Bosch. Then we cut the battery tray and squeezed in the largest possible battery in there. The battery replaced a 560 CCA to an 850 CCA AGM battery with a blanket battery warmer to prevent a no start condition in -40 Celsius or below.

Yokohama Winter Tires

Replaced all the light bulbs with Sylvania LED lights for maximum lumens at nighttime driving. Installed a set of  Yokohama ig52 winter tires to cope with snow and icy road conditions. Checked serviced the brakes with a brake fluid flush to prevent brake fluid icing.

He is a pilot and stationed in Pickle Lake Ontario, which is literally the farthest place you can drive to North in Ontario on all season roads. The distance from Techmax Auto Repair Inc. is 2300 kilometers, to the northwest.

The airport website states it:  Pickle Lake is “WHERE ALL ROADS BEGIN”.

He had to make this move to accumulate the required hours of flight time required by most airlines or the like.

Unusual times require an unusual approach. I think his ride will perform exceptionally well in the coming years in the arctic circle.

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Battery service.

When is a brake fluid flush recommended?

Oil, lube and filter service for your European Import Cars.


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BMW Suspension Repair

We rely on our cars to take us to places, therefore you ride on your suspension anywhere you want to go. Fixing worn damaged or corroded suspension components is not an easy feat. You need knowledge and experience, paired with the right tool for the right job.

European Car’s Suspensions Are Multi Link Systems

Most European car’s suspensions are multi link systems, either McPherson or wishbone at the front and 5 link per axle at the rear. The arms are joined either by a bushing at both ends or by ball joint.

To make matters worst, unfortunately road salt and potholes cause excessive and premature component wear over time. You need to be aware of the salt and the potholes on the road doesn’t help.

Wheel Bearing Replacement on A BMW 328xi

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BMW rusted axle nutBMW 328xi’s Rusted Axle Nut

On the photo at left is a BMW 328xi’s rusted axle nut.  To change the wheel bearing, the nut need to be removed.  Add some creativity and problem solving and whoala problem solved. This rusted axle nut had to be cut at the top and at the bottom and with the help of  special hydraulic press, the bearing replacement can be done easier.

We do plenty of shock absorbers, wheel bearings and bushings replacement, due to winter damages and or worn components.

BMW X1 repair in MississaugaBMW X1 Tension Arm Bushing

The bushings made from rubber and they are designed to keep the suspension components tightly bound together to control movement and stabilize the vehicle. When the bushings become worn, there is more room for the parts to move around, which can create rattling or shaking noises.

This particular bushing is an essential load bearing component in all BMW cars, therefore it’s imperative to have it replaced occasionally. We provide a free visual inspection at every oil change at your convenience.

BMW Tension Arm Bushings

The first two pictures at above you can see damaged, worn BMW bushings. On the third picture the old and the new improved version of the same tension arm bushing. There has been additional reinforcement added to the center load bearing section, to make them firmer and longer lasting.

Did you know all of this bushing are hydraulic fluid filled to dampen road vibrations? Proper ride control, suspension system is essential to keep any vehicle under safe control in motion.

Most excessive bushing wear needs a trained personnel to see and recognize the signs of a worn sloppy component. Decades of experience comes into play pointing out the issue at hand.

To resolve or fix European Cars properly we use plenty of specialized equipment like a hand held hydraulic press mentioned at above, to remove and install bushings, hubs and wheel bearings.

BMW repair- wheel bearing replacementBMW Wheel Bearing Replacement

You can see some one of our hand held hydraulic press in action on the picture at left. This tool make our job a breeze, instead of a struggle.

Therefore the right tool for the right job is imperative.

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BMW Alignment

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Lithium Ion Battery in Today’s Luxury Automobiles

Should have a title like beware of the LiFePO and lithium ion battery in your late model luxury automobile!

LiFePO Lithium Ion Battery.

Your newer modern high end luxury car has a weak point, called the lithium ion battery. Not in your electric car or not in your hybrid car only, in your conventional gas powered luxury automobile.

In this case, the luxury car is a Lamborghini Urus 2018, which is exactly the same car as the Porsche Cayenne GTS.  This type of battery
is also in the new BMW as well.

Most people are not aware the fact their late model BMW, Porsche and other luxury  cars equipped with a very expensive lithium ion battery.

Yes it’s lighter, yes it’s more powerful,  yes it’s very – very expensive and inconvenient when it doesn’t work anymore.

Please let me explain: The fancy high tech battery has a thermal overload protection build in which is permanently sealed off to anyone. So if thing go wrong you will be on the hook for thousands of dollars in a hurry. No, you can’t convert it to traditional lead acid or AGM battery.

We just had a very expensive encounter with a late model Lamborghini Urus. It had the fancy LiFePO battery and  wouldn’t start due to a dead LiFePO  battery. The exact translation would be lithium ion sulfate battery. It retails at $5800.00 the battery that is only. Yes you red it right, it cost five thousand eight hundred Canadian dollar.

How this “marvel” of engineering does work and how could go bad in a 4 year old vehicle?

The vehicle had over one hundred thousand kilometers, so it was way out of warranty. This fancy batteries will “brick” themselves. Say install or make it part of the cable to arrest any voltage spikes prior to the battery if you so worried about over-voltage. Therefore the internal relay can be sealed internally and  never need to be triggered unless it is charged or treated incorrectly outside of the vehicle by untrained personnel, or by the vehicle owner perhaps.

LiFePO Batteries Has An Internal Computer Built In

This batteries has an internal computer built in. It reports back to the vehicle energy management system. Therefore you can’t convert your vehicle to a conventional system, as it will not except anything else but a straight new replacement component.

LiFePO Lithium Ion Battery.

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The emergency relay can disconnect in 50 millisecond. If the battery voltage goes bellow 10 volt the system will disconnect and if you get lucky you may be able to resurrect it, but may require 20 hours of charging with a specific Li battery charger made by CTEK.

I’m not sure what is the main reason to go to extent of a poorly designed fancy battery like this, other than make sure the consumer will part with a bundle of money and the average garage will not be able help you whatsoever.

My question is: Why the manufacturer would not put a outboard voltage regulator before the battery pack? Say make it part of the cable assembly to arrest any voltage spikes coming at it prior so the fancy battery. The internal relay will only need to go into emergency disconnect if both regulators fail. The one in the alternator and one in line there after. This would just make proper sense.

This Technology Only Exist in High End Luxury Cars of Yet

This technology only exist in high end luxury cars,  as  Lamborghini, Porsche and some BMW of yet. Be assured, it will trickle down further on the “food chain” later.

Suffice to say, if you plucked down all that money to buy a new LiFePO battery, you potentially could buy a decent used car for it. Once you
buy a new LiFePO battery you will need to get the battery registered and programmed with the latest genuine software or it will not work at all.

BMW – Porsche – Mercedes Electrical System Testing

Additionally you better make sure your alternator is up to spec. Preferably with an oscilloscope to ensure your brand new pricey Li battery doesn’t get bricked again.

For your convenience we decided to do some research on the subject and even though it’s not recommended we took a dive into the said LiFePO battery pack to see what makes it work or not .

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Telephone: 905.795.0419


Hybrid BMW Repair

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COVID Effects on Internal Combustion Engines

The other victims of Covid less often recognized, are the damaged Internal Combustion Engines (ICE) engines.

Driving Ultra short Distances Effects Your Car’s Engine

Since people are more sedentary, staying home and or driving ultra short distances their car’s engines take a massive beating by water dilution. Today’s ICE engines are a refinement of an extraordinary effort to make them more efficient, therefore the piston rings are a shadow of their former selves literally.

Suffice to say the same principle applies to the entire internal architecture of the engine, therefore you need less energy to keep things in motion, hence their higher efficiency in generally speaking.

Unfortunately there are some negative aspects to this fine engineering marvel. The thin piston rings combined with the help of turbocharging, adds additional pressure to the combustion chamber, therefore the blow by volume is way more intensive than on a normally aspirated engine.

German Manufacturers Run Their Crankcase Ventilation System Under Negative Pressure

To make matters worse, most European (read German) manufacturers run their crankcase ventilation system under negative pressure to reduce pumping losses, to increase the efficiency even further. Unfortunately when you only drive ultra short distances the condensation from the blow by will accumulate inside the crankcase and since the skinny low tension rings can’t do much about it will reach a terminal point where water will get sucked up upon cold start and or the cappuccino alike frothy oil and water mix will destroy the fragile internal components.

German drivers use their car only if it is driven at a longer distance.

From my humble experience, there are no German drivers who will start their monster autobahn burner engine, if they could afford one per say as the fuel is so expensive at $2.50+ a liter. They use their car only if it is driven at a longer distance. Therefore the engine goes through a proper heat cycle, allowing the pistons to expand, the oil to get hot and allow the condensed water to be boiled off in the process.

It’s actually a simple chemistry where O2 burned with HC will form H2O in the process which by itself is harmless to the combustion process. Unfortunately if the same engine is driven ultra short distances the water accumulation will have detrimental, often fatal consequences to the engines delicate internal components.

Here are a few examples of a couple of COVID related BMW engine failures by the help of condensed water ingestion.

Picture #1: BMW M3 S65 piston rings with miniature oil scraper ring holes. How long do you think it takes to get them clogged up by infrequent oil changes?

Picture #2:  Old 944 Turbo sizable piston rings.

Picture #3 #4: The piston ring tension difference between a N55 BMW and an S65 BMW engines. The later has way more tension due to performance oriented application versus low tension N55 piston rings which ones were designed for high efficiency by low tensions naturally making things worst due to turbocharging.

 Visit our Facebook for more and bigger imagesDamaged BMW pistons with piston rings

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Telephone: 905.795.0419


BMW N20 Engine Repair

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German Combustion Engines

The internal combustion engines of German descent are designed differently.

Every country designs their vehicles for their own population or driving characteristics. Let me explain please.

The Germans are very good drivers for multiple reasons.

Reason #1: Driving in Germany is a privilege not a right. To get the privilege you have to get your driver license after finishing a grueling graduated licensing program, it’s a skill you build over years, not in a few hours like in here. Since they are highly educated about driving they’re allowed to drive fast on the autobahn naturally.

The direct relation to fast driving German cars has great brakes, you must have great brakes to bring a vehicle to a stop when you’re doing 200 plus kph. The chassis has to be made stiff and strong.

Reason #2; A loose chassis will kind of wadle at high speed no matter what. Additionally in case you crash at high speed you will have a much better chance to survive the crash, dead people do not buy cars .

The third asset is that if you drive fast especially in a standard transmission equipped car you’re more connected to the machine than an automatic transmission equipped vehicle. The additional benefit is their engines are built to survive the high speed driving therefore they’re built for the purpose.

German Cars’ Drive Ability Issues in North America

When these German Import Cars are shipped over to North America they develop multiple drive ability issues due to our vastly different driving habits. For instance in a manual gearbox equipped vehicle you the driver pick the shift points, so it’s up to you when you pick the next gear. On an automatic transmission equipped vehicle the computer decides to select the next gear.

Cars in North America are forced by the government regulatory agencies like EPA and CAFE standards will prevail to choose the most economical gear possible. Therefore selecting the highest gear at the lowest speed to have the best average fuel economy.

German cars are modified to north American driving standards with automatic transmission.

When you drive those cars as they are modified to North American standards inadvertently, you will end up with multiple engine issues.

Dirty oil in a engineGerman Engine  with dirty cappuccino look like motor oil inside.  Click on the thumbnail to view bigger image.

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We see a lot of engine issues due to ultra short distance driving. It causes blow by condense water build up in the oil sump, diluting the motor oil with water and fuel. Therefore the cappuccino-like slur will cause premature engine wear, especially at the bottom end of the engine and the cylinder head.

The only cure is to drive your German car as originally intended, spirited if possible, mostly in sport mode if automatic and at least 30 to 40 minutes after starting to elevate the oil temperature. So the engine gets self clean and will perform well for many years to come.

Good Quality 100% Synthetic German Motor Oils

Plus good quality motor oil, preferable 100% synthetic, timely oil changes and good quality oil filter help to extend the lifespan of any German car‘s engine.

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Telephone: 905.795.0419


Changes to Modern Car Engines. Motor Oils Standard

Synthetic Motor Oil

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Mercedes Benz S450 4matic Differential Repair

Well maintained Mercedes Benz S450 4matic destroyed it’s own differential. The silly lifetime fill of any gearbox, differential and transfer cases has its consequences.

Please let me explain. You can see in the photo down below, a completely destroyed front differential on a well maintained Mercedes Benz S450 4matic. The differential literally locked up and cracked the differential assembly in 3 places.

Mercedes Benz Differential Repair

Mercedes Benz S450 4matic Differential

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According to the client while driving the front wheels locked up momentarily. I assume that was the point when the case cracked from the gears locked up and the vehicle’s momentum made it get to that point.  This vehicle destroyed it’s own differential because of a minor axle seal leak,  which if caught in time could be resolved with some effort.

Please keep one thing in mind: The front differential is a sealed unit with a lifetime fill supposedly.  This would be just fine until all the gear oil leaked out and the gears ate themselves. Unfortunately this differential is so tucked away, the manufacturer deleted the fill and drain plug entirely. This could be still overcome by removing one axle shaft and sucking the oil out and refilling it from the same way, just saying.  We find a lot of similar issues with transfer cases as well.

Late model BMW

For instance, late model BMW has no drain hole for the transfer case assembly nor the differentials. Therefore it takes some extra effort to suck the old tired fluid out and refill them the same way, but there is a will there’s a way.

Let’s face it, there is no fluid and no lubricant meant to last forever. Do yourself a favor and get your vehicle serviced every one hundred thousand  kilometers at least, so it can last for decades without developing a lack of lubrication related problems.

Remember, we are European Import Car Specialist at Techmax Auto Inc. We fix BMW, Porsche, Mercedes, Mini,  and have the expertise to fix yours too.

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Telephone: 905.795.0419


BMW 535 GT Repair | BMW 535 GT Maintenance

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BMW N20 Engine Repair

2013 BMW X3 with the popular, but troublesome BMW N20 engine.

Well maintained BMW X3 with BMW N20 Engine

Received this well maintained BMW X3 with a no start condition.  We were told, it was diagnosed at a Toronto dealership as “may” need a timing chain, and they opted to replace the timing chain tensioner assembly.

We tried to start it after being towed in, we did not succeed, the  car did not start. Got the owner permission to remove the valve cover, and oh boy the poor thing lost 80% of it’s timing chain guide. Therefore the timing chain jumped timing naturally, the computer was seeing the timing way out of specified position, and did not allow the engine to fire up. It cranked but did not start.

BMW N20 Engine Timing Chain Failure

Unfortunately we had to confirm a total timing chain failure. Honestly I’m not surprised for one moment as the car odometer had 229860 kms  in it, it’s lasted much longer than average.

Timing Chain Replacement on BMW’s N20 Engine 

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BMW’s N20 Engine Common Problem

When all said and done, she run like a charm albeit had a low boost fault. Its BMW’s N20 engine common problem. After some further testing we found a turbocharger error.  The turbocharger wastegate was severely worn out.

The vehicle owner wanted this car to drive for a few more years, so we got a good quality used turbocharger to keep the costs down.

BMW N20 Engine’s Turbo Charger Replacement

We replaced the turbocharger at the same time updated the pressure feed line with the newer revised version, to ensure proper operation and turbo longevity.

We reset the adaptations and than road tested it multiple times. She is back in business and runs really well, “purring like a kitten”.

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Telephone: 905.795.0419


The Famous N20 Engine Timing Chain Issue

BMW N20 engine failure

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BMW 535 GT Repair | BMW 535 GT Maintenance

BMW repair many occasions requires an inside knowledge and decades of experience. Knowing what are the weak spots  of the BMW, comes whit knowledge and experience, hence we can prevent an expensive breakdown in the near future.

BMW 535-GT Front Propeller Shaft Failure

Here is a perfect example of a 535-GT front propeller shaft failure which is a typical issue on most BMW with accumulated kilometers on it.

This particular vehicle is maintained by its owner, we only see this vehicle when it’s broken. In this case not performing a preventative maintenance, cost almost an engine replacement, as the seized propeller shaft finally let go and punched a gigantic hole into the oil pan.

When We Service BMW 535 We Remove This Shafts

When we service BMW 535s we remove this shafts on the regular basis to check the U joint condition. In fact we even have replacement universal joint in house to repair this shafts as some of them cost some silly money from the manufacturer.

On this BMW we had a hard time to source a proper exact replacement oil pan and ditto for the front propeller shaft.

The owner got lucky, he managed to shut the engine down in a hurry, which saved his N55 engine. He said when the shaft broke he killed the engine instantly.

Either way we would not know if there is or has been any internal engine damage to the crankshaft or the bottom end bearings.

We had to come up with some clever solutions to test the engine, to be able to confirm the engine did survive the ordeal. Therefore we cleaned the broken oil pan with a de-greaser.  Let it dry and remove any oily residue, applied windshield glue to the open area around the hole and glued a heavy plastic sheet over on it, and let it cure overnight .

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BMW N55  Engine Repair

Next day we removed the oil filter and filled up the channel with fresh motor oil quickly. When the engine had proper amount of oil in, we started her up instantly.

The engine run properly without any noise or sign of excessive wear. At this point we knew we can proceed with the proper repair and resurrect this vehicle to it’s former glory.

BMW N55 Engine Connecting Rod Bearings Replacement

Needless to say we will remove and replace the bottom end connecting rod bearings with new performance bearings,  just in case. Additionally the new performance bearings are superior design made with improved materials compared to the genuine bearings design.

It just makes perfect sense to replace them while we have the bottom end open. It’s a simple procedure at this occasion.

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Telephone: 905.795.0419


Why does my engine burn oil?

BMW or Mercedes Maintenance During COVID.  

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BMW Hybrid Repair – Hybrid Maintenance

In case you are wondering, do we repair and maintain BMW hybrids? The simple answer is absolutely yes.

BMW i3s with REX and a BMW i8

Personally I’m a big fan of hybrids as they provide a quick and very efficient transportation, in most cases without the inconvenience of range anxiety. Actually I’m driving (when I’m not riding my bicycle) a hybrid BMW for 7 years plus. Therefore I have first hand experience about BMW hybrids.

I own and drive a BMW i3s with REX and a BMW i8. I love both cars, but they’re built for 2 different purpose.

The BMW i3 is a city car, quick agile and traditionally rear wheel drive, hence you still have the BMW driving dynamics with the weight all at the bottom of the car. It’s like a little go kart if you will.

The BMW i8 is a purpose built performance hybrid to give you an astonishing light agile performance hybrid with the gas mileage of a Prius.

BMW Hybrid Repair | Software Update

We repaired few BMW i8 early 2014’s versions recently. As they accumulate the kilometers over the years, they require some maintenance and repairs. There can be some pattern problems, like the thin aluminum water pipe cracked beside the battery pack, where the owner was quoted some astronomical repair cost elsewhere.

BMW i8 Hybrid Repair

BMW i8 hybrid repair

BMW Hybrid Replacement Parts

The replacement parts were back ordered for months, therefore we decided to repair the defective component, instead of replacing it with a new one. We got the pipe repaired, weld and reinforced at a very reasonable cost. More like into the hundreds versus the thousands as it was quoted prior to us.

We also had an A/C compressor replaced on a BMW i8 recently due to noisy compressor. That particular i8 had the entire system flushed out and cleaned and new A/C condenser with dryer installed to ensure reliability for many years to come.

BMW Hybrid Air Conditioning Service

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The pictures are from the i8 ac compressor and condenser replacement. The dark stuff that leaking out is the metal soup from the worn/ broken compressor assembly.

Did you know the BMW i3 and the BMW i8 both use the electronically operated and controlled air conditioning system to aid in the temperature management of the lithium ion battery pack? For that reason the the air conditioning system should be serviced every 3 to 4 years to ensure there is plenty of refrigerant within the system as it carries the lubricant within the refrigerant. It’s absolutely detrimental to have it serviced or it will cause a premature compressor failure due to lack of lubrication within the closed circuit.

BMW Hybrid Software Update

We look after other BMW hybrids as well like a recent E machine replacement on a 2018 530E which was unfortunately out of warranty due to driven distance. In this case we used the factory BMW ISTA diagnostic equipment and software for proper diagnostics with timely software update, re-flash if required, as per the manufacturers recommendations for the best possible results.

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Telephone: 905.795.0419

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