Volvo XC90 T8 Recharge Mk2

The ERAD is a self-contained unit combining electric motor and single-speed transmission that drives the rear wheels. First-generation ERAD units have a documented weakness in the clutch mechanism and thermal sensor. Symptoms include grinding noises from the rear, hesitation on acceleration, juddering (axle tramp), or complete loss of rear-wheel drive. Volvo extended the warranty on this part to 5 years in some markets after the failure rate became apparent. Out of warranty, a complete ERAD replacement runs €8,000-12,000 at Volvo dealers. UK independent specialists offer a repair-and-modification approach at around €3,500-4,500. A Volvo technician quoted on InsideEVs stated almost all early SPA-platform PHEVs may eventually need this work, with the XC90 disproportionately affected due to its higher weight.

The HVCH provides cabin heating when the petrol engine is off. Forum evidence indicates these are failing regularly on T8 models across multiple production years. Symptoms include no cabin heat in EV mode, error messages, and reduced battery range. Volvo extended warranty coverage on this part to 8 years / 160,000 km in many markets after the failure pattern became established. Out-of-warranty repair includes the unit itself (€1,500-2,000), an associated valve, coolant flush, and labor totaling €2,000-3,500 at Volvo dealers. Updated parts paired with new software are intended to prevent recurrence on replacements.

The OBC converts AC from the wall socket to DC for the high-voltage battery. Failures are commonly reported on T8s with daily charging routines, typically appearing between 60,000-120,000 km. Symptoms include charging stopping mid-session, error messages on the charge port, or refusal to charge entirely. Quality Bulletin P10077 from Volvo covers OBC replacement for some cases. Replacement runs €2,000-3,000 for the part plus labor, sometimes higher if related components like the AC compressor module are also affected. Some dealers maintain the OBC is not covered by the 8-year hybrid battery warranty, creating cost disputes.

Air suspension is standard on most T8 trims. The compressor is the most common failure point, often manifesting as constant running noises, slow ride height recovery, or the car sagging to its lowest setting overnight. Below -20°C, compressors are notably vulnerable. Replacement of the compressor and relay costs approximately €600-1,200 at independent specialists, but individual air struts can fail too (€800-1,200 each). Cars used in cold climates show higher failure rates around 80,000-130,000 km.

A widespread complaint across all T8 production years. The car normally maintains the 12V battery from the high-voltage system, but a software defect causes intermittent drains of 1-15 amps. Owners report new 12V batteries dying in just over 12 hours in severe cases. The fault typically triggers multiple warnings including ‘Reduced performance', ‘Hybrid system failure', and ‘12V battery charging fault'. Resolution sometimes requires DC-DC converter replacement, but software updates have addressed many cases. If the car will sit unused for over a week, keep it plugged in or on a trickle charger.

Sensus-based pre-facelift cars (2015-2019) suffer regular center display freezes that disable climate, radio, and navigation controls. Most cases resolve after letting the car sleep for 30 minutes, but persistent issues may need software updates from the dealer. Volvo's planned Android Automotive (AAOS) update for 2.5 million older cars has been delayed multiple times. Hardware replacement of the screen module is rare but costs €600-800 when needed. Less impactful on facelift (2020+) cars running newer software.

The 11.6 kWh (later 18.8 kWh on facelift) lithium-ion battery shows typical degradation patterns. Most owners report range loss from advertised figures to roughly 20-25 km after 5-8 years of regular charging. Full battery failure is rare but cases exist, particularly outside warranty. Volvo provides an 8-year / 160,000 km warranty on the battery pack with a 70% capacity guarantee. Out-of-warranty pack replacement is prohibitively expensive (€8,000+) but individual module replacement is sometimes possible at lower cost.