Rear Multi-Link Suspension Passive Steer Bush Wear
ModerateSuspension & ChassisThe 406 features an advanced multi-link rear suspension design with trailing arms, transverse links, and passive rear-steering tie rods. After years on potholed UK roads, the rubber bonded bushes on the rear transverse track control arms and passive steer links perish and develop significant play. This causes vague rear-end handling, wandering or twitchiness on motorways, severe scrubbing of the rear tyres, and recurring MOT failures.
Rear end feels floaty or wandering when changing lanes at motorway speeds, Loud knocking or clattering from rear axle when crossing road manhole covers, Uneven tyre wear across rear tyre tread pattern, Advisories or failure for suspension arm ball joint / bush play on MOT history
- Drive at 60–70 mph on a straight dual carriageway to verify straight-line tracking without rear instability
- Inspect rear tyre tread for feathered or uneven wear patterns
- Pry rear passive steer links and transverse arm bushes on a ramp to detect rubber degradation and free play