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For example, the 2011 E92 335i, which received the new N55 engine, was released in 3/2010 but as a 2011 model. However, BMW often "pre-releases" models earlier in the year, especially for a facelift (LCI facelift) or for major updates. CLAR (Cluster Architecture) is a modular engineering platform with components that can be spread among various models (further subdivided into classes, such as UKL and GKL).īMW model years traditionally begin in September of the previous year. The BMW CLAR chassis is not the same as the chassis code. There were just as many F chassis models in ten years as there were E codes in the previous 40 years! It saves time by having more information and a shorter code. Now a coupe, sedan, cabrio, and wagon have different chassis codes even though most of the engine, driveline, brakes, and suspension are all shared.
BMW VIN DECODER ENGINE NUMBER CODE
It wasn't until the mid-2000s that BMW used a different chassis code for different body styles. The short span of F chassis codes can be attributed to the proliferation of codes for various body styles. By the late 2000s all of the E codes were used up and BMW switched to F chassis codes, which were replaced with G chassis codes just ten years later. Not all E-chassis are production cars, even concept vehicles may receive an E code.
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The number advances with each new model project. The 'E' stood for Entwicklung, which is German for "development". The E code system we use today began in the mid-1960s with the development of the E3 'New Six' sedans. We can only speculate this is a habit from the old M code days when major revisions carried a TU suffix (M62TU) and BMW can't completely abandon it.
BMW VIN DECODER ENGINE NUMBER UPDATE
TU stands for Technical Update and indicates a new engineering feature. BMW will also sometimes combine new and old engine keys, such as an N63TU instead of N63T1. Our guess is they wanted to separate it from the slightly different N52K and N52O engines found in 2006 models. For whatever reason BMW stuck an N on the end in 2007 instead of the more logical N52B30M0 (which is also referenced on BMW documents but is a mouthful to say). The "N52N" is commonly seen in BMW documents and referenced on sites such as RealOEM. Occasionally you will see engine codes that don't match the above keys and this is usually BMW using a shorthand abbreviation of the code. So far, all PHEV vehicles use a mostly-standard B-series gasoline engine with an additional electric battery and motor so the "XB1" code is largely irrelevant when shopping for engine parts. For example, the G20 330e has a "XB1142O1" powertrain consisting of the B46 gas engine and GC1P25M0 electric battery/motor. We haven't seen a key that explains the code but it will start with "XB1".
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PHEV (Partial Hybrid Electric Vehicle) use an additional powertrain code for the engine + electric motor. After the S63 the S engines more closely follow the corporate code key from the N engines. S engine codes roughly use the format of the M engine key all the way up to the S63 engine in 2009. We've listed one N engine code key above but acknowledge there may be several other variations out there.īMW M GmbH were also slow to adopt newer code logic. The technology is changing so often that even the internal logic can't agree. Surprisingly, BMW does not often play by its own rules and follow its own corporate logic. The official motorsport race engines use a "P" code.Ĭlick on an image below to view the breakdown for each engine family. The format now in use traces back to the mid-1980s. BMW engine codes are designed to provide a lot of information about the engine design and technology in a short amount of space. Standard BMW engines use a "M", "N", or "B" code. But as the range of BMW engines expanded they needed a more meaningful code designation. The engine codes used to be quite simple - M10 for four cylinder, M20 for small six cylinder, and M30 for the Big Six. BMW engines are known by their M, N, B, S, P, or W codes while BMW chassis and bodies are known by their E, F, G, or U codes. These code systems help keep planning and development organized and avoids confusion. For BMW these are known as chassis codes and engine codes. Every car manufacturer assigns an internal code designation to identify their vehicles.