Audi A5 Used Buying Guide

Generation matters for oil consumption, timing, PCV, and cooling.

Good with records; scan DPF, EGR, injectors, and NOx systems.

Strong cruiser but emissions, timing, and repair costs rise.

Performance models require specialist checks and clean modification history.

Common engine problems

• EA888 timing, PCV, oil consumption, and carbon buildup.
• Cooling leaks, thermostat housing, and water pump issues.
• Diesel emissions faults and injector correction concerns.
• Diesel emissions faults can turn a cheap car into an expensive repair if DPF, EGR, AdBlue, or NOx data is ignored.

Gearbox issues

• S tronic service gaps, mechatronics symptoms, or rough engagement.
• On DSG/S tronic cars, missing fluid-service proof and low-speed judder should change the price immediately.

Mileage danger zones

• 70k-100k miles: verify gearbox service, cooling-system condition, suspension wear, and complete fluid history.
• 90k-130k miles: scan DPF soot load, EGR/NOx history, injector corrections, and regeneration behavior.
• 120k+ miles: buy only with boring paperwork, clean scan data, and no hidden warning history.
• At any mileage, a cleared fault scan with no service proof is a bigger warning than cosmetic wear.

What to check before buying

• Confirm engine and gearbox codes before the test drive.
• Listen for cold-start rattle and check oil consumption evidence.
• Scan engine, gearbox, AWD, ABS, and body modules.
• Test low-speed shifts, reverse engagement, and steady acceleration.
• Ask for the exact engine code, gearbox type, service invoices, and a full diagnostic scan before paying a deposit.