The differential mount bushings can also be changed to aftermarket polyurethane to remove the sloppy acceleration feeling that worn OEM rubber mounts will give you.Redish Motorsport E46 V3 RACP Reinforcement Plate Kit Unlike the E36 M3, the E46 models did not receive sheetmetal reinforcements from the factory and subframe and floor failures continued to be a problem well into the E46 production.Ĭan you change the bushings on a BMW E46 M3? Rear subframe and floor failures are quite common on the E36 and E46 models. What are the differences between the E36 and the E46? The rear subframe mount gussets (where the subframe is bolted to) are tack welded to the bottom layer. The rear floor of the E46 is actually two sheets of steel with a gap between them. What is the rear floor of the E46 made of? Typically what is done is 4 plates are welded on the bottom side of the chassis. While BMW made a recall kit for the E36 chassis they didn’t do so for the E46 so we are left to our own devices to reinforce it. The rear subframe, particularly on the early produced non-M 3 Series, often rips from the mounting points over time. How do you reinforce the rear subframe of a BMW E46? A shop may be able to do the same with a subframe. Furthermore, the issue can throw off the vehicle’s wheel alignment, resulting in steering issues that compromise safety. What happens when a subframe breaks?Ī mangled subframe can cause other parts of the vehicle (e.g., motor mounts and suspension components) to wear out prematurely. The risk is too high (IMO) to save a couple of hundred dollars.
Everyone has different tolerances for risk, but it were me, I’d do a claim through insurance and make sure its done right the first time. It’s probably not safe to drive with a cracked sub frame. So the crack is going to form anywhere around that mount. So the crackMoreThis side you have a little gas filler nozzle. Starts here4:31Quick Check: E46 Subframe Cracking/Tear – YouTubeYouTubeStart of suggested clipEnd of suggested clip56 second suggested clipThis side you have a little gas filler nozzle. How do I know if my E46 subframe is cracked? The average cost of the reinforcement is $1500.00 The cost of the repair after a failure would be determined on a case by case basis. How much does it cost to reinforce E46 subframe? No matter the shape, model or way it is driven, subframe cracks are inevitable. Can you change the bushings on a BMW E46 M3?ĭespite the beliefs of some, all E46 3-series BMW’s are prone to cracking at and around the rear subframe mounts.What are the differences between the E36 and the E46?.What is the rear floor of the E46 made of?.How do you reinforce the rear subframe of a BMW E46?.How do I know if my E46 subframe is cracked?.How much does it cost to reinforce E46 subframe?.
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