imagesThe automotive industry is giving warranty on the product that they produce and sell in unmodified state. This is a logical way of doing, only a few things seem not completely fair in this matter..


BMW / Mini Warranty cancelation

If a BMW diesel with manufacturer warranty is tuned by an ECU Remap, BMW is able to detect this at the moment the car is diagnosed by an official BMW Dealer with the official BMW diagnostic tool. This is an automatic feature, the BMW dealer itself has no influence on this if they use the official dealer tool. From that moment on the car has lost warranty on the complete drivetrain including engine, gearbox, axles, brakes etc. This is an irriversable event, once happened there is no way back. Other tuning parts like exhaust systems, intercoolers, oil coolers usually do not influence your warranty, since the factory cannot detect these items remotely. Your official BMW dealer could report this to BMW, but this would be an exception and customer unfriendly behavior, and not common.

Why BMW is voiding warranty after Tuning?

There are more reasons for BMW to void warranty after tuning, and we believe the biggest one is money. The last few years cars became more modular, and were fitted with the same engines only the output was different. Another reason is that there are many Tuners that don’t do decent research before tuning a car, with damaged components as a result. So BMW does not want to pay for that either.

  • To prevent that the cheaper models are going to be sold and tuned in the aftermarket to the specifications of a more expensive model.
  • They do not want to pay for damaged components caused by (bad quality) tuning.
  • To protect their image, as a broken BMW on the side of the road does not look good. People passing by don’t know the cause of the problem, so it could hurt the reputation on reliability for BMW.

It is understandable that BMW decided that all ECU Remaps are voiding warranty, because they cannot spend time to decide what car has good quality remap and what car has a bad quality remap. Only one thing is not really fair in our eyes, and that is related to car models that have known problems like ignition coils, injectors on some petrol cars, and turbo control valves on some diesel models. In these cases BMW could easily recognize if this is common or not and in the common cases still give the customer warranty. But this is usually not the case..

Is there a way around it?

There are things that can be done to prevent loosing your factory warranty, first one is do not tune your car that is under warranty, or keep a few things in mind when you want to tune your car.

  • Never bring your car to an official BMW dealer with a Remap loaded in the car. If you really need to go to an official BMW dealer for maintanance or repair, first make sure the remap is removed from your car properly. Best thing is to go to a BMW specialist who can give your BMW a complete software update with a BMW like (offline) diagnostic tool, this tool can check if the car is going to be detected for voided warranty or not.
  • Go to a BMW specialist instead of an official dealer for maintanance  if this is allowed by the BMW warranty conditions.
  • Instead of installing an ECU Remap, purchase a product that can easily be installed and removed by the enduser, and triggers no detection and leaves no traces behind when removed. This product could be a Mosselman Tuning Module that is placed between sensors and Engine ECU, creating more power without the notice of the Engine ECU or the car.

imagesThe cars that our customers have vary in age and miles from brand new to almost 10 years old with 125.000 Miles (200.000Km). The older cars can have hidden problems, or some parts close to the end of there life, new cars can have unexpected problems or even engineering mistakes. These aspects can appear on stock cars, as well as on tuned cars, and it will not always easy to find the cause.

No warranty on your car, or any of its original parts
Because of these facts mentioned above we cannot give any warranty on the car or any parts of it that were not manufactured by Mosselman Turbo Systems. Some competitors claim to take over the warranty of the manufacturer, this can be done by raising the pricing by 100% – 200% or make a legal document with all kind of exceptions resulting in no legal claims from customers. If your car is still in the period of Manufacturer Warranty, read our tips in another article on this page Can I still count on manufacturer warranty after tuning?” to not loose your Manufacturer Warranty. Third party products could have manufacterer warranty on them, Mosselman is not in any case extending a third party product warranty or responsible for any additional costs in a case of warranty on such an item.

Is there a warranty on Mosselman products?

At Mosselman Turbo Systems we stand behind our product and support that with a limited warranty that the product is free of factory mistakes, and performs as indicated. On most items on the website we will add specific durations on this limited warranty.

The results may look the same on paper (or on websites), but the quality of the calibration on the remap can be huge. Like with all products in the market, there are good product and poor quality products, only on remaps it’s hard to tell before you purchase, or to compare.


More details follow later, or send an email.

Check our shop to see how the corecharge works. More details follow later, or send an email.
fuel octaneOctane rating or octane number is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating (igniting). In broad terms, fuels with a higher octane rating are used in high performance gasoline engines that require higher compression ratios. In contrast, fuels with lower octane numbers (but higher cetane numbers) are ideal for diesel engines, because diesel engines (also referred to as compression-ignition engines) do not compress the fuel, but rather compress only air and then inject fuel into the air which was heated by compression. Gasoline engines rely on ignition of air and fuel compressed together as a mixture, which is ignited at the end of the compression stroke using spark plugs. Therefore, high compressibility of the fuel matters mainly for gasoline engines. Use of gasoline with lower octane numbers may lead to the problem of engine knocking.

In a normal petrol or spark-ignition engine, the air-fuel mixture is heated due to being compressed and is then triggered to burn rapidly by the spark plug. If it is heated (or compressed) too much, it will self-ignite before the ignition system sparks. This causes much higher pressures than engine components are designed for, and can cause a “knocking” or “pinging” sound. Knocking can cause major engine damage if severe.

The most typically used engine management systems found in automobiles today have a knock sensor that monitors if knock is being produced by the fuel being used. In modern computer-controlled engines, the ignition timing will be automatically altered by the engine management system to reduce the knock to an acceptable level.


We recommend premium fuel for your Tuned Car

Especially when engines are Turbocharged or Supercharged, the compression of the fuel mixture wil be even higher so more sensitive to knock. This is why we strongly recommend to use a premium fuel with an octane rating of 98 or higher in most countries, including Australia, New Zealand and Europe, and an octane rating of 93 or higher in Canada, the United States, Brazil, and some other countries. The reason behind this difference is explained below.


Methods of measuring the Research Octane Number


Research Octane Number (RON)

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

Motor Octane Number (MON)

Another type of octane rating, called Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel’s knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON.


Different octane ratings around the world


Anti-Knock Index (AKI) or (R+M)/2

In most countries, including Australia, New Zealand and all of those in Europe, the “headline” octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number(PON).

Because of the 8 to 12 octane number difference between RON and MON noted above, the AKI shown in Canada and the United States is 4 to 6 octane numbers lower than elsewhere in the world for the same fuel. For example octane 95 fuel in Europe is comparible with octane 90 in the United States, and octane 98 in Europe is comparible with octane 93 in the United states. This difference between RON and MON is known as the fuel’s Sensitivity, and is not typically published for those countries that use the Anti-Knock Index labelling system.

What is more important, horsepower or torque? This is a question that you get various anwers on when you ask different people, but the peak numbers still gives you just an indication about an engines karakter. Even engines with exactly the same maximum horsepower and torque can feel pretty different.

More details follow later, or send an email.

faq-img1If you purchased a remap or performance package for your car by us, and upgrade to a higher stage on the same car we can offer you some discount. The discount depends on the purchase date of your current tuning stage, and is a percentage of the remap.


More details follow later, or send an email.

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