Volvo XC90

The Roots-type supercharger on the T6 Drive-E tends to seal failure from around 150,000–200,000 km. Degraded plastic and rubber parts allow uncontrolled air ingress. Typical fault code: P0171 (system lean). Repair cost 2,000–5,000 €.

Symptoms: Power drop especially at low rpm, check engine light P0171, poor fuel economy, supercharger ancillary noises

The timing belt change on the T6 is more complex than on T4/T5 due to the integrated supercharger. Labour time and costs are correspondingly higher. Change interval 120,000 km/8 years also applies.

Symptoms: No warning signs; recommendation: inspect from 100,000 km

The T6 supercharger bypass valve fails mechanically and triggers fault code ECM P00C423. Typical problem on older T6 engines, causing power loss and irregular engine running.

Symptoms: Irregular power delivery, check engine light with code P00C4, power drop at shift points

The T6 Drive-E shares the oil consumption problem of the early VEP4 family. All T6 pre-production years (2015–2018) are known as 'oil burners'. Volvo warranty extension to 8 years applies to documented cases.

Symptoms: Noticeably dropping oil level, no visible external loss, occasional blue smoke

Plastic intake manifolds on diesel models from 2015–2017 can overheat and deform, posing a fire risk. Check for recall and ensure replacement by a Volvo dealer.

Recall 2019–2020: the automatic emergency braking system (AEB) does not correctly detect obstacles and does not activate. Check recall status at the Volvo dealer and have the software update applied.

The ERAD (electric rear axle drive) on the XC90 T8 is a known critical weak point. Clutch wear sends metal particles into the differential oil, leading to bearing damage and complete failure. Repair outside warranty can cost up to €9,000.

On the XC90 II B5/B6, plastic turbocharger hoses rupture under boost pressure. Several owners report sudden power loss on the motorway. Volvo responded with reinforced hoses in later model years.

On the XC90 II with optional air suspension (Four-C / Air Suspension) the compressor fails, especially on older vehicles or after moisture ingress. The car drops onto its bumpstops and is no longer driveable normally.

In 2016 around 11,000 XC90 II vehicles were recalled in Germany: the A/C drain hose was defective and let water into the footwell. Damp wiring looms can permanently damage control units.

The optional air suspension on the XC90 II can fail in low ambient temperatures: the vehicle loses ride height, the compressor runs endlessly or reports a fault. Software updates partially help.