Ok. All I've replaced. Front: struts, control arms and bushings, inner and outer tie rod ends, strut links and brakes. Rear: shocks, shock mounts, rear trailing arm bushings and upper and lower rear control arm bushings.
The problem: rear tires lose traction easy. Dry pavement or wet. With about 1/4 pedal the traction control kicks in. And when I'm taking a right turn the car sways and even at 10 mph will try to slide out.
I love my car but it's making me worry. Is there something else I need to replace?
Was a professional four wheel alignment done after all of the suspension work? Who did the work?
Thread being moved to the model specific discussion area.
04M3 TiAg 69k slick-top 3 pedal
99M3 Cosmos 61k S50B32 euro 6Spd
88M3 AW 43k miles Project FS
WTB: 3.5" Eurosport/Conforti CAI
what are the fault codes is there or has there been water in the car because the yaw pitch sensors if damaged or defective control throttle input thru the traction control system
I did the work and had it aligned after.
No fault codes. And never any water. I'm pretty sure it's mechanical from the feel of her.
By “no fault codes” do you mean the ABS was scanned and it showed no codes? Where was the car aligned? Does the shop specialize in European cars, especially bimmers? While the E46 isn’t terribly complex suspension-wise, it is sensitive to misalignment.
How does the car loose traction on a dry road, first part is the tires, then the axle/diff, then driveshaft, transmission, and of course electronic interference by traction control. I feel like there is some thing missing in the explanation of the problem at this point I would take it to a BMW shop and have them take a look.
The car was aligned at qc automotive and no on the specialist. And this didn't stay happening until about 6 months after everything was changed. Tires are good and before this started happening I could floor it on dry pavement and it would launch great and now it doesn't. Could it be the rear differential bushing causing this problem?
What happens when you drive with DSC turned off? Will it accelerate without spinning up a rear wheel and corner OK?
So when launching or acellerating hard from a stop the tires are actually spinning and the car is not moving?
If I drive with the dsc off it'll let the tires spin. And will not take power away from the tires so they slide even further. And the tires do spin even if I'm driving in manual shift it'll break loose if I punch it while already moving.
Can you read the live data? I had a faulty wheel speed sensor on my car and that would trigger the DSC to cut in. It showed a difference of about 20mph on one wheel but was so fast that it did not trigger a fault code. The only way I found it was to record the live data on video and slow it down. FWIW, DSC cuts in when there is a difference of about 2mph. But if this is happening all the time, I'd also want to see what the raw rate sensor is reading. Mine thought I was driving down the road at about a 45 degree angle so it applied the front right brake to correct it. Are you getting any unusual brake dust on one wheel?
Was the car ever scanned with an autologic or Ista yet,mifnnit I would find a shop that has one of those and have the entire car scanned
I've just used my scanner on it and it's an old one. I might have to get a newer one.
But if feels like suspension more than an electronic problem.
It feels like the driver side is squatting in the rear when I take off.
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