2008 Volvo S80 Problems: 7 Known Issues

On the 2007-2016 Volvo S80, the 3.0L inline-6 T6 engine (B6304T2/T4) in the S80 uses a BorgWarner BV50 twin-scroll turbocharger that develops oil leaks and bearing failure, typically after 80,000-120,000 miles. The turbo oil feed line develops cracks and the banjo bolt copper washers harden, restricting oil flow to the turbo bearing. The turbo also suffers from oil coking due to high underhood temperatures. The S80 T6 shares this engine with the XC60, XC70, and XC90 of the same era. The turbo failure often coincides with PCV system degradation, which creates a cascading failure pattern.

On the 2007-2016 Volvo S80, volvo recalled 2007-2016 S80 sedans under NHTSA campaign 20V378000 because the flexible steel cable that attaches the seat belt to the front outboard seating positions can fatigue over time. On an affected S80, that cable is what ties the driver's or front passenger's belt to the car, so if it fails the belt may not restrain the occupant in a crash. NHTSA lists 308,260 units for the campaign as a whole, which spans several Volvo model lines, not the S80 alone. Volvo's internal recall number is R10029 and owner notification began December 10, 2020.

On the 2008-2010 Volvo S80, volvo recalled 2008-2010 S80 sedans because, under certain conditions, the software in the Central Electronic Module (CEM) may fail to send the signal that starts the fuel pump. Without that signal, the fuel pump electronic module (PEM) never activates the pump. Because residual pressure remains in the fuel system, an S80 owner can often still crank and start the engine normally, and in some cases drive a short distance at idle, before the engine stalls. NHTSA classified the defect under Electrical System: Software. The campaign covered 11,993 vehicles in total across all models included in the recall.

On the 2007-2016 Volvo S80, the Aisin TF-80SC 6-speed automatic transmission in the S80 develops valve body issues and torque converter shudder, particularly between 60,000-100,000 miles. The valve body solenoids lose calibration, causing harsh shifts and delayed engagement. The torque converter lockup clutch shudders at 30-50 mph under light throttle. The transmission fluid breaks down over time (despite Volvo's 'lifetime fill' claim), accelerating internal wear. This same transmission is used across many Volvo models (S60, V70, XC60, XC70, XC90) and has a well-documented failure pattern.

On the 2007-2016 Volvo S80, the Aisin 6-speed (earlier) and 8-speed (later) automatic transmissions develop harsh shifting, particularly the 2-3 and 3-4 upshifts. Delayed downshifts and a shudder during light throttle cruising are also reported. Software calibration and fluid condition are key factors.

On the 2007-2016 Volvo S80, the electronic parking brake (EPB) system on the S80 is prone to motor and control module failures. The EPB uses electric motors on the rear brake calipers to engage and release the parking brake. The motors can fail from water intrusion and corrosion, especially in northern climates with road salt. The EPB control module can also fail, leaving the parking brake either stuck engaged (vehicle won't move) or unable to engage (vehicle rolls freely). The system requires VIDA diagnostic software for service and calibration, making DIY brake jobs more complicated. Volvo recalled some S80 models for EPB-related issues.

On the 2007-2016 Volvo S80, the rear brake calipers seize due to corrosion of the caliper pins and the integrated electric parking brake mechanism. Causes uneven rear brake wear, a burning smell, and the vehicle pulling to one side under braking. Salt belt vehicles are most affected.