Audi A5 Sportback 2019–2021: rear-arm nut cracking and wheel position

The documented defect is a broken nut

Audi describes stress-corrosion cracking in particular nut batches. Failure on the rear trailing-arm eccentric bolt could change alignment. An off-centre steering wheel in straight travel and pulling during braking/acceleration are possible signs.

Volkswagen Group of America / NHTSA repository: Part 573 Safety Recall Report 21V-295 / Audi42L1

Intervention sequence matters after impact

Retain wheel/tire/suspension images before work. A dismantled connection no longer shows original tightening force. A nut absent after repair cannot establish its loss time.

Editorial inspection order.

Full material about the model

Stress-corrosion in specific fastener batches, impact alternatives and alignment limits.