Audi A5, A4 +16 more: Suspension

Affects Audi A5, A4, Q5, S4, S6, A6, A8, S7, S8, S5, A7, SQ5, RS Q8, Q7, Q8, RS 5, RS 6, RS 7 · 2019–2021 — about 5K vehicles.

The hazard

Issue: On certain vehicles, the lock nuts for the rear trailing arm bolts may be defective. If a nut breaks, there could be sudden changes in rear wheel alignment. This can cause a loss of vehicle stability. Safety Risk: Reduced vehicle stability could cause a loss of control and increase the risk of a crash. Corrective Actions: Audi will notify owners by mail and instruct you to take your vehicle to a dealer to replace the rear trailing arm lock nuts. If necessary, the associated bolt(s) will be replaced as well.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational