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BMW E30 3-Series Front Sub-Frame Variations
This article discusses the front sub-frame (a.k.a. front axle support), for the E30 with the main focus being on a technical analysis of the variations based on part number. If you're not here for the technical analysis but would rather buy a used unit from us, guaranteed to work and fit, then please select the link below:
Last Updated: 07/22/2018
Parts Group: Sub-frame bare unit
The information herein is based on conclusions drawn, after looking up various part numbers on the Web.
- Sub-frame bare unit (Front), as on: E30 ix, Part Number: 31111134834
- Sub-frame bare unit (Front), as on: E30 ix, Part Number: 31111701064
- Sub-frame bare unit (Front), as on: E30 with M10 engine, Part Number: 31111126427
- Sub-frame bare unit (Front), as on: E30 with M20 engine non-ix, E30 with M42 engine, Part Number: 31111126428
- Sub-frame bare unit (Front), as on: E30 with M20 engine non-ix, E30 with M42 engine, Part Number: 31111130707
The E30 with the M10 engine (in other words, the 1984-1985 318i) uses a different front sub-frame than any of the other E30 models. The part number is 1126427.
The E30 ix, as in the 4-wheel drive model, comes only with the M20 engine. That also uses a different front sub-frame than any of the other E30 models. Its part number is 1134834 and there’s an alternate part number of 1701064 too.
The E30 M3 uses a different-yet front sub-frame.
All other E30 models sold in the US (318ic, 318is, 325, 325e, 325es, 325i, 325is, 325ic) use yet another variation of the front sub-frame. Its part number is 1126428 and there’s an alternate part number of 1130707 too.
All of these items use a part number prefix of 3111.