TI-Motorsport offer a thorough and cost effective repair solution to this common issue for E46 M3s. With experience with both road and race M3s you can be sure your pride and joy is in good hands. As well as permanently repairing and reinforcing the subframe mounting points, we also provide a folder with photos along the way for your records/service history.
Here’s how our process goes
Removal of the rear interior to make sure nothing is at risk of being damaged from welding heat etc.
Removal of all rear suspension and drivetrain components as well as the fuel tank.
Removal of standard underseal/seam sealers to identify cracks /areas of concern.
Drill-stop and weld any and all cracks around the mounting points
Welding in reinforcement plates & grinding flush
Rebuild & check/set geometry
We offer this service from £1500 including VAT, depending on the severity of the cracks. While the subframe and fuel tank are out there are several common weak points that our customers often ask us to attend to. These include;
Replacement brake hard lines (over-tank) – £150
Yellowspeed rear camber arms fitting – £100
Diff rebuilds with or without BMW Motorsport 3.9/4.1 final drives – POA – We keep a spare differential here, so we can have it ready to go for you to minimise down-time
Powdercoating & rebushing the subframe and differential – POA – We keep a spare subframe here, so we can have it ready to go for you to minimise down-time