BMW chassis codes are alphanumeric designations used to identify specific BMW models, and they help classify the generation and body style of a particular vehicle. These codes are useful for distinguishing between different versions of BMW models. Below is a summary of important BMW chassis codes by series:

3 Series (Compact Executive Car)

• E21 (1975–1983): The first 3 Series.
• E30 (1982–1994): Known for its success in motorsport and being a classic enthusiast car.
• E36 (1990–1999): Introduced multi-link rear suspension.
• E46 (1998–2006): One of the most popular and beloved models, known for its balance between sport and comfort.
• E90/E91/E92/E93 (2005–2013): Four versions: sedan (E90), wagon (E91), coupe (E92), and convertible (E93).
• F30/F31/F34 (2011–2019): Sedan (F30), wagon (F31), and Gran Turismo (F34).
• G20/G21 (2018–present): The latest generation, with a larger and more tech-focused design.

5 Series (Executive Car)

• E12 (1972–1981): The first 5 Series, designed by Paul Bracq.
• E28 (1981–1988): Featured new technology such as ABS.
• E34 (1987–1996): Known for its reliability and build quality.
• E39 (1995–2004): Considered by many to be one of the best-driving BMWs.
• E60/E61 (2003–2010): Sedan (E60) and wagon (E61), polarizing design by Chris Bangle.
• F10/F11/F07 (2010–2017): Sedan (F10), wagon (F11), and Gran Turismo (F07).
• G30/G31 (2017–present): Latest generation with updated technology and more efficiency.

7 Series (Luxury Sedan)

• E23 (1977–1987): The first 7 Series, introducing high-end luxury features.
• E32 (1986–1994): Introduced V12 engines and advanced electronics.
• E38 (1994–2001): Featured in films, known for being high-tech for its time.
• E65/E66 (2001–2008): Known for its controversial design.
• F01/F02 (2008–2015): Focused on luxury and comfort with advanced tech.
• G11/G12 (2015–present): Latest iteration with cutting-edge autonomous driving features.

X Series (SUV)

• E53 (1999–2006): The first X5 (SUV), introducing BMW to the SUV market.
• E70 (2006–2013): The second-generation X5.
• F15/F16 (2013–2018): X5 (F15) and X6 (F16).
• G05 (2018–present): Current X5 model.
• E83 (2003–2010): First-generation X3.
• F25 (2010–2017): Second-generation X3.
• G01 (2017–present): Current X3 model.
• F48 (2015–present): Current X1 model.

M Series (Performance)

• E30 M3 (1986–1991): The iconic motorsport version of the 3 Series.
• E46 M3 (2000–2006): Famous for its balance of performance and everyday usability.
• E60 M5 (2005–2010): Introduced the V10 engine.
• F80 M3 (2014–2020): The high-performance version of the F30 3 Series.
• F82 M4 (2014–2020): High-performance version of the 4 Series.

These chassis codes are used internally by BMW and enthusiasts to refer to specific generations and body types of their cars. If you're interested in a specific series or model, feel free to ask for more details!