Volvo XC90 B6 Mk2

Owners on SwedeSpeed and Volvo Forums report the 12V auxiliary battery dying after only a few days of inactivity, sometimes within weeks of a replacement. The mild hybrid system has high parasitic draw and the integrated starter-generator setup is sensitive to weak batteries. Symptoms include unresponsive electronics, dead key fobs, and random SRS/airbag warning lights. A battery replacement is around €200-400, but if the BMS (battery monitoring sensor) or 48V system needs diagnostics the bill can reach €800-1,500. A trickle charger is strongly recommended for cars used infrequently.

The optional Four-C / air suspension is widely reported as a weak point. Rear air springs develop slow leaks from cracked rubber bellows, often noticeable as the car sagging overnight. The factory dust covers were fitted with substandard zip ties documented in TSB reports. Air compressor failure is also common after 80,000-120,000 km. Single air spring replacement runs €1,400-1,800 at a Volvo dealer; compressor replacement €600-900. A full system overhaul can exceed €4,000. If the car you are looking at has air suspension, this is the highest-cost risk to evaluate.

The pre-2022 Sensus and post-2022 Google-based (Android Automotive) infotainment systems both have a track record of freezing, black screens, slow boots, and CarPlay/Android Auto disconnection issues. Most owners can resolve issues with a soft reset (hold Home button 20 seconds) or by waiting for the next over-the-air software update. Persistent hardware failure of the head unit is rare but replacement costs €800-1,200. The good news is most software issues are eventually patched; the bad news is the experience can be frustrating over the first 1-2 years of a problem.

The XC90 Mk2 has had brake issues acknowledged across forums since launch. The electronic parking brake and regenerative braking calibration on mild hybrid cars puts more load on the rear brakes than expected, so rear pads typically need replacement at 30,000-50,000 km. Front discs are prone to warping, causing brake pedal pulsation. Volvo has changed rotor material composition mid-production. Front pads and discs replacement at independent specialist around €400-600; rear €300-500. OEM parts at the dealer cost considerably more.

Sunroof drain tubes are widely reported as undersized and prone to clogging, with TSB TJ31272 specifically addressing rear leaks. Symptoms include water dripping from the rearview mirror area, damp footwells, or musty smell. If left unaddressed, water can reach the Intellisafe sensor box (housing the camera and yaw-rate sensor), causing electrical failures and stability control faults. Drain cleaning is preventive and costs €150-250. Repair of damaged electronics or carpet drying can reach €2,000-2,500.

Volvo's 2.0L VEA engine family uses a plastic PCV oil separator that becomes brittle with heat and age. When it cracks or the internal passages clog, symptoms include rough idle, whistling vacuum noises, oil consumption, and oil leaks past crankshaft seals. This is well documented across the VEA engine range and is more of a high-mileage concern than a near-new car problem. Replacement at independent specialist around €400-700; at Volvo dealer €800-1,200 given the intake manifold typically needs removal.