Audi SQ5

The ECU-controlled oil pump reduces pressure at idle to approx. 1.0–1.4 bar. At high motorway oil temperatures with bearing wear, this pressure is insufficient — con-rod bearings seize from 150,000 km.

Symptoms: Oil pressure warning at idle or on country roads, knocking noises, in severe cases engine failure

All 272-hp variants built before January 2017 contained faulty camshafts. Tooth flank noise and fractures are possible; Audi acknowledges the problem, goodwill depends on mileage.

Symptoms: Clattering or ticking from camshafts even after brief warm-up, rough running, in severe cases sudden engine stall

The EA897 uses four timing chains — one per cylinder bank, one connecting chain and one for the oil pump. All chains, tensioners and guides must be renewed together.

Symptoms: Rattling on cold start, metallic knock on throttle, engine light with camshaft faults

Injector failures with oil dilution from fuel ingress. Less common on EA897 evo than predecessors, but costly to repair: replacing multiple injectors can cost €4,000.

Symptoms: Rough engine, rising oil level (fuel ingress), heavy soot production, increased consumption

The 3.0 TDI in the SQ5/S4 B9 needs sufficiently long runs for DPF regeneration. Predominantly short-trip use accumulates ash in the filter. Above 45 g load, ceramic melting is at risk.

Symptoms: Engine warning light 'particulate filter system fault', noticeable power reduction (limp mode), increased fuel consumption. DPF regeneration runs more frequently and for longer.

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.

Salt water penetrates the rear control arm bushings. Stress corrosion can cause the bushings to come loose, resulting in increased steering play and changed handling dynamics.

Fuel rail seals can leak, with fuel escape and fire risk. Affects early FY model years 2017–2018. Recall code 24DP.

Moisture enters through cracks in the inverter housing of the belt-driven starter-generator — short circuit, overheating, fire risk. Recall code 27H2, approximately 530,000 vehicles worldwide.

A manufacturing defect in the front seat adjustment mechanism can impair the restraint function in a collision. Approximately 2,918 Q5/SQ5 vehicles affected worldwide.

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.

Pads and discs wear quickly on the SQ5 due to vehicle weight and sport-biased setup. Rear pads are often worn from 40,000 km, fronts by 60,000 km. City driving accelerates the process noticeably.

The upper control arms of the front axle show bushing and joint wear at higher mileages. Typical from 80,000–120,000 km, especially with spirited driving or poor road surfaces.

Air suspension rubber bellows become brittle and porous. Gradual pressure loss causes the car to sink, mainly at the front. The compressor then runs continuously and overheats.

The optional carbon-ceramic brake loses significant braking performance in cold and wet conditions. Loud squealing in winter is well documented. Audi explicitly flags this characteristic.

Water collects in the front body sill sections and causes internal corrosion. Recall action: remove rust, prime, repaint, retrofit plastic covers.

The A/C compressor can fail at higher mileages. Common causes are refrigerant loss through micro-leaks in the condenser (vulnerable to stone chips) or mechanical wear.