Audi SQ7
V8 BiTurbo diesel with 320 kW and electric compressor. Technically highly complex engine with 900 Nm torque. Exclusive and powerful, but correspondingly expensive to service.
V8 diesel with e-supercharger — technically unique, emotionally divisive
435 hp V8 TDI with an electric supercharger that fills the turbo lag gap — this tech exists nowhere else. Acceleration feels surreal for 2.3 tons. But the sound remains diesel, running costs are brutal, and the electric supercharger is an expensive wear item. A technology showcase that polarizes.
Engine Weaknesses 5
Excessive DPF regeneration events allow diesel fuel to enter the engine oil, causing the oil level to rise. A known problem with no permanent fix — regular oil level checks are essential.
Symptoms: Rising oil level, oil level above maximum, slight increase in consumption, occasional diesel smell from engine bay
The electrically driven auxiliary compressor of the 48V system fails at higher mileages. The symptom is poor throttle response in the low rpm range. Repair is complex.
Symptoms: Poor throttle response on take-off, power loss below 2,000 rpm, engine management warning light
Intake manifold and tumble flap coke up from blowby gases and EGR. Cleaning sometimes requires a full engine removal; repair costs are therefore very high. Primarily affects short-trip vehicles.
Symptoms: Power loss, poorer throttle response, increased fuel consumption, rough running
The diesel particulate filter does not fully regenerate with frequent short-trip driving. Blockage requires a forced regeneration at a workshop or expensive DPF replacement.
Symptoms: DPF warning light, power reduction, increased fuel consumption, stationary engine regeneration
The EGR valve gums up from soot deposits and causes hesitation and elevated emissions. Short-trip use accelerates wear due to insufficient operating temperatures.
Symptoms: Rough idle and rpm fluctuations, engine warning light, increased fuel consumption
Vehicle Weaknesses 5
Standard air suspension shows frequent compressor and air bag failures from 80,000–120,000 km. Leaking bags make the compressor run continuously until it burns out.
AdBlue system on 3.0 TDI models shows frequent faults from around 60,000 km: clogged injectors from urea crystallisation, faulty dosing pump. Repair costs up to 4,000 €.
Kerb weight above 2,000 kg leads to significantly elevated brake wear. Front brake discs and pads may need replacing as early as 30,000–50,000 km.
MIB2 infotainment system tends to crash and complete failure from electrical faults or moisture ingress. MOST ring network fails completely when one component drops out.
Electrically extending tow bar shows frequent control unit faults (EEPROM, Hall sensor). Without correct coding, ACC and front camera fail.
Reports & Tests
646 owner complaints filed with NHTSA (2015–2026). Most reported: Lighting (154), Electrical (129), Engine (127).