15 Mar BMW E46 Subframe Reinforcement Cost
If you’re thinking of buying a E46 M3, you should be aware of the all too common subframe cracking issue that affected all E46’s. Motor Trend explains, “The suit originated in 2006 and claimed that defects in E46 3 Series models cause fractures in the rear-axle supports in the subframe. Symptoms include clunking from the rear and outright subframe failure.”
We always recommend reinforcing your subframe before the fractures happen but as you’ll see in the images below, this subframe floor had already started to crack. Fortunately for our customer, the cracks weren’t so bad that a major floor replacement was needed: See here
To date, we’ve probably done approximately 30 of these subframe reinforcements and we’ve seen the cracking on cars with mileage as low as 30,000 miles to cars as high as 150,000 miles. Keeping that in mind, if you’re in the market for a E46 it is highly recommended that you have the car professionally inspected and if you are already a E46 owner, reinforce your subframe before it leads to something worse! A typical subframe reinforcement will cost around $1,500 and if the entire floor needs to be replaced, you’re looking at somewhere around $4,000-$5,000.