The BMW 633CSi E24 evolved into the M635CSi when the M88/1 engine from the M1 was modified to fit into a strengthened 633 chassis. 

The new engine designation was M88/3. Since the 633 chassis was not originally designed to accommodate this engine, it was mounted at an unusual 30 degree angle. The Motorsport Division balanced the car with close ratio gearbox, an improved suspension, and servo assisted brakes on all four wheels. 

Little was done to distinguish the M6 visually from the 635Csi, other than the M6 badge and a slightly larger air dam. This car was a luxury sports coupe, having luxury features found on the 635CSi such as leather power seats, electric sun roof, and climate control. It was thus a heavy car with a well appointed interior, but it had tremendous performance. It was expensive, competing in the price range of the Porsche 928 and Ferrari 308GTS.

The high cost and understated presentation limited the car’s success. Only 5,855 units were made from 1983 to 1989. BMW had to tune down the engine to meet the emission standards in the United States. The US version of the engine was designated as an S38. Other changes included different Motronic tuning, cam timing, and exhaust headers.

BMW E24 M6 pictures suitable for desktop wallpaper.

BMW E24 M6 review has facts and figures.

M635CSi.de is a German noncommercial BMW M6-Fansite. Lots of pictures and good info.

John G.Burns E24 and M6 info. He calls the model "a thing of beauty even now - no BMW has ever been so distinctive."

BMW 6 Series includes BMW M6 and BMW M635CSi. Has several review articles:

• A NEW COUPE FROM BMW - 630 CS and 633 CSi: technical analysis & driving impressions (USA)

• ROAD TEST BMW 635 CSi - Bavaria's flagship gets a 5-speed gearbox (USA)

• ROAD TEST BMW 628 CSi - Smaller version of BMW's slingshot 635 (UK)   

• ROAD TEST BMW 630 CSi - The ultimate BMW? (USA)

• ROAD TEST BMW 633 CSi - Near perfection (UK)

• AUTO TEST - BMW M635 CSi (UK)

• BAYERISCHE LöWE - Test BMW 635 CSi

• STARS AND STRIPES - Test BMW Alpina 630 Turbo und 530 Turbo

BIMMERIN info page on the BMW 6 series E24 and M6 with specifications and pictures.

1987 BMW M6 with several photos. A must see!

1987 BMW M6 recalls and repairs.

1984 BMW M6 has pictures and information.

1984 BMW M6 information

BMW M 635 CSi and M6.

BMW Information page on the M6. Click here for a picture.

Six Forever links from the BMW 6er Club.

BMW 635 M6

The BMW 6 Series Message Board includes the E24 and M6.

M6 page from the BMW CCA Illini Chapter has some photos.

M635.de in English and German.

MSN CarPoint 1988 BMW 6-Series has specifications and warranties.

M6 Survey Comments from CarTalk:

• 1984
• 1985
• 1987
• 1988

The Senior Six Registry feature on a 1985 M6 motor.

SRS Diagnosis Information for fixing the Supplemental Restraint System used in the M6.

635CSi and M6 audio tips.

BMW Motorsport GmbH BMW E24 M635CSi has photos with text in Russian.

BMW 6 Series Page with model range and production history.

635CSi page from the UK has some M6 info.