Audi Q5 Mk1 2.0 TDI 170bhp Known Faults

2.0 TDI 170bhp CR2008–2017DieselAutomaticSUV4 known faults

Audi's mid-size SUV. The Quattro drivetrain adds Haldex complexity; DPF and EGR issues are shared with the wider VAG TDI family.

What To Check Before Buying

✓Check service history — was oil changed regularly?
✓Look for blue/black smoke on startup and under load
✓Listen for rattles, knocking, or turbo whine
✓Test all electrics including windows, AC, and central locking
✓Check for DPF warning light or recent regenerations
✓Inspect for rust underneath and around wheel arches
✓Request a pre-purchase inspection by an independent mechanic

Known Faults

EGR and Timing Belt Failure

Critical

2008-201780,000–140,000 miles£500–£1500

The Q5 TDI shares the EGR cooler failure of the wider VAG TDI family, plus the timing belt must be replaced at 140,000 miles — a job many owners defer dangerously.

Haldex Quattro Rear Differential Failure

Severe

2008-201760,000–150,000 miles£100–£2000

The Q5 Quattro uses a Haldex rear differential that requires regular oil and filter changes. Neglected units lose rear drive, reducing the car to front-wheel drive in slippery conditions.

Air Suspension Compressor Failure

Severe

2008-201780,000–160,000 miles£300–£1500

Q5s fitted with the optional air suspension develop compressor failures and air bag leaks. The car visibly sags and a warning appears. Repair costs are significant.

DPF Blockage in Urban Use

Moderate

2008-201740,000–90,000 miles£250–£1500

The Q5 TDI is a family SUV often used on the school run. The combination of heavy kerb weight and short trips causes chronic DPF blockage.

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