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Welding is mandatory for installation of this kit. One Left rear subframe mounting point Reinforcement 5. This kit will save time when repairing the chassis, and is also strongly recommended as a preventative maintenance item. We do this by thickening the metal and distributing the load over a larger area. ![]() This product reinforces the chassis sheet metal at the subframe mounting points. Our reinforcement kit has proven over and over again to be effective and the easiest to work with in the long run. It can also make any additional work there harder and almost impossible to weld against. This seems to work but that does not address the issues of the spot welds failing on the sheetmetal. BMW has also tried to prevent the issue by injecting foam into the open space between the underside of the chassis and the top of the trunk. This is where we have seen many failures of the chassis on low mileage street cars and race cars. The unfortunate side effect of this is that the load from the front of the subframe now gets transmitted to the left rear of the subframe. This cross member keeps the front mounting points from having problems by placing the bushing and the stud in double-sheer, thus reducing the twisting action on the sheet metal. This constant loading and unloading weakens the sheet metal and causes it to fatigue and separate from the chassis.īMW tried to fix this problem in the E46 by placing a cross member on the front two mounting points of the subframe. This happens because the rear differential transmits the torsional load from the engine through the subframe, then into the chassis. One of these problems is the rear mounting points for the subframe, which can rip out from their spots in the sheet metal. An unfortunate side effect of this is that the E46 also shares some of the same problems as the E36. The E46 rear driveline and suspension are very similar to that of the E36. 2014), it has unfortunately long since expired and you're on your own. Under the terms of the settlement from BMW, they did have an inspection, approved repair procedure, and reimbursement policy in keeping with the terms. ![]() It is true, there was a class action lawsuit against BMW regarding the E46 subframe failures. #BMW E46 M3 SUBFRAME REINFORCEMENT INSTALL#New, stiffer mounts will reduce the risk of chassis failure by keeping the subframe secure and not tearing at the chassis mount locations.Rogue Engineering is proud to install this item in our Upper Saddle River, NJ facility! Call us for an appointment! #BMW E46 M3 SUBFRAME REINFORCEMENT FULL#Aluminum is full solid and recommended only for track and race vehicles. #BMW E46 M3 SUBFRAME REINFORCEMENT SERIES#Powerflex uses Street (70A) or Black Series (95A) compound to suit your driving environment. Never reinstall worn stock rubber mounts. Note: We also highly recommend replacing your worn rubber subframe bushings with Powerflex polyurethane or solid aluminum mounts. We have seen a lot of these cars lately with subframe mounting completely ripped out. We weighed the options for a while and we have found that this is the right way to fix it. ![]() If you do that, we still recommend you install this kit to prevent it from happening again. Must-have for any and all E46s driven hard on the street or trackĬlick here for installation instructions and photos. That is at least double the time, not to mention the price of the parts from BMW.Protects subframe and chassis from costly damage.The E46 Rear Subframe/Chassis Reinforcement Kit consists of 4 main subframe mounting point reinforcements, spacers to realign the cross member, hardware, and plates to cover the access panels in the trunk. This kit applies to all BMW E46 cars, including the M3. Our E46 reinforcement plates are a factory fit and can be welded in when subframe bushings are replaced. We highly recommend doing this modification to any car that sees autocross, driving schools, and race use BEFORE the damage occurs. This can occur with regular road use, and if you drive your BMW E46 hard, then chances are very high that you'll need to repair this area at some point in the future. The rear subframe-to-chassis attachment points on the E46 are all failure prone and can rip away from the unibody after time. We currently offer two kits - this one that has the most surface area and more coverage, and a smaller but less expensive kit. This kit is developed in-house at BimmerWorld and has more surface area and covers more of the problem areas than older competitor's kits. BMW E46 Rear Chassis/Subframe Reinforcement Kit (Competition)These weld-in plates are the perfect solution to repair and strengthen the rear of your BMW E46. The E46 Rear Subframe/Chassis Reinforcement Kit solves a problem that plagues the E46 3-series just as it did with the earlier E36 3-Series models. ![]()
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