2019 Audi Q8 Problems: 12 Known Issues

On the 2019 Audi Q8, certain 2019 Audi Q8 vehicles are covered by Safety Recall 40O4 / NHTSA 19V114. Audi states that a front shock-absorber fork may crack, allowing the shock absorber to loosen and the tire to contact the wheel housing, which can affect steering control and increase crash risk. Only a small VIN-defined population is affected; model year alone is not eligibility.

On the 2019-2025 Audi Q8, audi TSB 2059363/6 applies to air-suspension-equipped 2019-2025 Q8 vehicles when the instrument cluster reports an air-suspension malfunction and suspension control unit J775 stores C1260F0 for no communication or U112100 for a missing message, both with symptom code 262400. The bulletin identifies communication with compressor-control unit J1135; it does not establish universal air-spring, strut or compressor wear.

On the 2019-2021 Audi Q8 V6, certain 2019-2021 Audi Q8 V6 vehicles are covered by NHTSA recall 22V516 / Audi 20DR. A component inside the fuel-delivery module can break and damage the pressure-regulator sealing membrane. The emissions-control warning usually illuminates, and rough running or a no-start can occur; in rare cases the engine can stall while driving without a prior warning, increasing crash risk. Eligibility is VIN-specific.

On the 2019-2026 Audi Q8, certain 2019-2026 Audi Q8 vehicles are included in NHTSA recall 25V900 / Audi 90TV because driver-assistance software can prevent the rearview-camera image from displaying. A missing rearview image reduces visibility while reversing and increases crash risk. Eligibility depends on the VIN and installed parts and software, not model year alone. The recall does not establish universal dual-screen freezing, phantom touches or hardware failure.

On the 2019-2024 Audi Q8, audi Service Action 27BQ includes certain 2019-2024 Q8 vehicles equipped with a 48V belt starter-alternator. Audi states that an affected unit can inhibit start-stop operation and increase emissions while stopped, while emissions remain within certification standards. Model year alone does not establish eligibility: the VIN must show 27BQ open. A generic electrical warning, rough restart or U046900 by itself does not prove starter-alternator failure.

On the 2019-2023 Audi Q8, the Q8 (2019-2023) experiences MMI infotainment system failures including touchscreen freezing, system not booting, random reboots, and backup camera failures. Similar to other modern Audis, the complex electronics suffer from software glitches and module failures. Owners also report parking sensor malfunctions, warning lights, and battery drain. Most issues improve with software updates but some require MMI unit replacement ($2,000-$3,500). While frustrating, most are not safety-critical.

On the 2019-2023 Audi Q8, the Audi Q8 with the 3.0T V6 engine (2019-2023) suffers from severe carbon buildup on intake valves due to direct injection design. Similar to other Audi DI engines, fuel bypasses intake valves, leaving them exposed only to oil vapors from the PCV system which bake into hard carbon deposits. Over 60,000-100,000 miles, carbon restricts airflow causing rough idle, misfires, hesitation, and power loss. Walnut blasting is the usual remedy once heavy deposits are confirmed; Audi sets no cleaning interval and owners report widely varying buildup. Failure to clean can cause valve damage requiring engine work on the Q8's expensive V6.

On the 2019-2023 Audi Q8 3.0L V6 TFSI (EA839), the plastic crankcase oil separator / PCV assembly on the EA839 3.0 TFSI can crack or clog with sludge, dumping oil mist into the intake tract and disturbing crankcase pressure regulation. This contributes to elevated oil consumption, rough idle, extended cranking, oil-fouled spark plugs, and lean/misfire fault codes. On the EA839 the PCV block (with the oil fill cap) is mounted on the driver's-side cylinder head, and a common failure point is the check valve built into the PCV hose; when it fails, boost pressure can be forced into the PCV block, causing oil leaks, burning oil, and even the oil cap popping loose.

On the 2019-2023 Audi Q8, owners report the ZF-based 8-speed Tiptronic automatic exhibiting harsh or jerky gear changes, a 'clunk' or 'jolt' on engagement, hesitation, and unclean shifts — most noticeable on low-speed downshifts, 1-2 upshifts, and (on RS Q8) under manual shifting above ~3,500 rpm. Causes range from degraded/low transmission fluid and adaptation drift to worn transmission/engine mounts. Some owners report dealers initially calling the behavior 'normal.'

On the 2019-2024 Audi Q8 V6 TFSI, audi TSB 2070349/4 applies to 2019-2024 Q8 V6 TFSI vehicles with coolant loss, a coolant warning or an engine warning when the coolant pump is suspected. Audi requires precise leak confirmation: a small trace in the drip cup can be normal and dried deposits at the vacuum connection alone do not prove a leak. In individual confirmed cases, coolant can contaminate change-over valve N649 and produce P0299 as a secondary condition.

On the 2019-2021 Audi Q8, audi TSB 2056944/10 applies to 2019-2021 Q8 vehicles when water drips from the headliner area. Audi requires inspection of four possible paths: a blocked, pinched or kinked drain hose or outlet; a detached or malformed roof-opening seal; incorrect glass-panel adjustment; or water breaching normal channeling around the wind deflector. The bulletin does not support a universal cracked tray or full sunroof-frame replacement.

On the 2019-2024 Audi Q8, heavy Q8 (and shared Q7 platform) vehicles with large 21-inch-plus wheels and coated rotors suffer rapid surface rust on rotors when parked or driven in wet/salted conditions. The Geomet/zinc coating wears off the friction surface, and rust forms on the rotor hat, edges, and vents, producing squeal as pads scrub it off. Combined with the SUV's weight, owners report premature pad and rotor wear, brake pulsation/vibration from uneven rotor deposits, and noise. Replacement parts are expensive due to rotor size.