Audi Q5

The EA288 Evo derivative DTNA shares the EGR cooler leak susceptibility common across the entire EA288 engine family. Cracks in the cooler allow coolant into the exhaust tract. Fault code P0401, coolant loss without visible external leak is characteristic.

Symptoms: Coolant loss without visible leak, white smoke from exhaust, dropping coolant level, overheating warning

The EA288 Evo DTNA, like its predecessors, uses a wet-running timing belt in an oil bath. With missed or extended oil-change intervals and incorrect oil grades, belt material degrades prematurely. No officially set replacement interval from Audi/VW increases the risk.

Symptoms: Whistling, rubber fibres in engine oil, irregular firing order, engine stutter, ECU faults

On the EA839 3.0 TFSI, the oil feed line to the turbocharger can become partially blocked by coked oil (Longlife intervals), causing turbo bearing failure.

Symptoms: Whining/whistling from turbo, power loss, blue smoke, metal particles in oil.

The EA839 3.0 TFSI (DTNA/CZVC) shows, like its predecessor (EA837), occasional timing chain rattle from weakening tensioner elements, particularly on cold start.

Symptoms: Brief rattle on cold start (1–3 seconds); with advanced wear continuously audible.

The EA288 Evo with aluminium block sometimes shows higher oil consumption than the standard EA288. Some 200-hp Evo engines need around 1 litre per 5,000 km. Low piston-ring tension for friction reduction contributes. Early diagnosis is important.

Symptoms: Dropping oil level between changes, light blue smoke under load, oil smell from exhaust, elevated consumption from the outset

KBA recall: stress corrosion cracking can cause elevated play between the control arm and wheel carrier. Affects build years 2019–2021. Free replacement at dealer.

Recall for Q5 FY (production July 2018 to March 2019): faulty brake master cylinders increase stopping distance. Free replacement programme through Audi.

The Haldex rear differential suffers from oil contamination by clutch debris when maintenance is neglected. A differential oil change clears the symptoms. Neglect risks differential damage.

Brake callipers seize especially after prolonged standing. Rear axle callipers are most affected. MOT reports list brake defects as a frequent fault.