![e46 m3 subframe crack e46 m3 subframe crack](https://www.harrisonmotorsports.com/images/thumbnails/1000/1000/detailed/9/E46M3-Headers.jpg)
Therefore, a track-prepped E46 should never see any flex or deflection in any of the subframe mounts. Not only do all of the suspension arms attach to it, the driveline runs through it via the differential and half-shafts. Product Details The rear subframe is the heart of the BMW rear suspension. One front bushing is slotted to allow for BMW's manufacturing tolerances. The aluminum is CNC machined for a precise fit and minimal weight. These subframe mounts are over-engineered to be a major improvement over the stock subframe mounts not only for performance but also in strength as well. These solid subframe mounts were designed for racing use only, where we won several sports car championships in the Grand-Am Cup series.
![e46 m3 subframe crack e46 m3 subframe crack](http://www.fluidmotorunion.com/wp-content/uploads/2014/07/DSC_4490-Copy-625x415.jpg)
The Turner E46 Reinforcement Kit is still recommended. These fully solid aluminum mounts have absolutely zero flex to them so they will not contribute to rear subframe issues. This is the primary cause for the infamous rear subframe failure. Too much flex from worn rubber mounts will transfer to flex where the subframe meets the chassis/floor. The rubber stock mounts, and the Delrin mounts to a small degree, flex and deflect as various forces are applied throughout the subframe - on and off throttle loading, cornering on flat surfaces, bumpy surfaces, weight transfer, sticky race tires, etc.
E46 m3 subframe crack series#
While our Delrin-Aluminum subframe mounts conform to various racing series these all-aluminum mounts are the ultimate in reducing flex and deflection. Excessive movement here transfers to unwanted suspension motions elsewhere and is also a major contributor to failures in the rear floor sheetmetal. Every e46 has the same design flaw but its the harder drive, more powerful cars like the M3 that tend to suffer the most.
E46 m3 subframe crack crack#
Therefore, a track-prepped E46 should never see any flex or deflection in any of the subframe mounts. The crack from above turns through 90deg and travels right up. Also fits 2009-2016 E89 Z4.The rear subframe is the heart of the BMW rear suspension. Our solid differential mount is available separately.įits all coupe, sedan, convertible, and touring model cars including M3 (not for use in E46 ti / Compact cars). This set of E46 mounts includes all 4 mounting locations. The stock rubber mounts lose their rigidity which allows the rear floor sheetmetal to flex and tear, leading to rear subframe failures. Additionally, on high-powered street cars, these bushings will reduce chassis metal fatigue and structural tearing caused by the constant flex associated with the stock rubber bushings. Active Autowerke E46 REAR SUBFRAME Reinforcement. These CNC-machined solid aluminum mounts keep your suspension in precise alignment. INSTRUCTIONS BMW E46 323i,325i,328i,330i,M3 1999 - 2006 E46 REAR Subframe Reinforcement Repair KIT. A solid-mounted subframe helps improve handling and response without a huge penalty in ride comfort (newer models like the F8X M3/M4 and F10 M5 come from the factory with solid mounts). Because all of the rear suspension and differential are attached to the subframe, when it moves so does everything else. Our solid aluminum subframe mounts for the 1999-2006 E46 323i/325i/328i/330, E46 M3, and E89 Z4 are designed to prevent movement of your E46 subframe that would otherwise allow your entire rear suspension geometry to shift, resulting in sloppy handling.