Failure of the front control arm bracket bushings—often referred to as thrust rod bushings—is moderately common. One symptom is a clunk or jolt felt in the steering when braking.Google+
Car Problem Reports
BMW 330i Front Control Arm Bracket Bushings May Fail
BMW 330i Problem
Average Mileage: 82,109 mi (35,000 mi - 123,000 mi)
Visitor, 2001 BMW 330i, 123,000 mi
loose feel on steering. replaced and problem solved.
Visitor, 2001 BMW 330i, 88,000 mi
It sounds like someone smashes a big hammer on to the car. It is a very loud noise. You can feel it in the steering wheel too. But it is cheap and anyone can do it. Takes less than 30mins if you have the right tools. I replaced mine twice within 1.5 years.
at 35K mine i had to replace bushings too
Visitor, 2004 BMW 330i, 42,000 mi
Replaced by dealer at 35,000 under warranty because they were "blown out". Replaced again by dealer at 42.000 because they were "totally worn out" Not sure what the deal is but I cringe when I see a pot hole. Car not under warranty anymore. Sport Suspension.
Visitor, 2006 BMW 330i, 76,000 mi
Brake pedal shake when braking and the steering wheel!
Visitor, 2006 BMW 330i, 80,000 mi
Had the front control arm bushings go out around 80,000
Replace lower control arm assemblies in front end
Visitor, 2001 BMW 330i, 65,000 mi
replaced at 65,000 miles