Volvo S90

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

A faulty weld between the rotor shaft and the hydraulic brake assembly was found on the V90 II and S90 II. If it fails, ABS, ESC and brake assist are disabled. Volvo issued a recall in 2021.

On XC60 II vehicles built between September 2018 and April 2019, nuts and bolts at the rear axle may be too loose. Handling can change abruptly; check recall status.

Plastic intake manifolds on diesel engines up to model year 2018 can overheat and pose a fire risk. Check for Volvo recall; affected models were fitted with metal manifolds.

Water gets into the windscreen wiper motor and causes it to fail. SPA platform models are affected; a 2020 recall addressed incorrectly tightened wiper arms. Visibility in rain significantly impaired.

The air suspension elements on the V90 Cross Country models show wear from as early as 70,000–100,000 km. A warning message and loss of ride comfort announce the failure; repair costs are substantial.