Haldex 2 / 3 Service Kit - P1 P2 S40 V50 S60 V70 S80 XC90

If your AWD P1 or P2 Volvo has unexpectedly left you stranded in slippery conditions, it's possible your car's AWD needs service.

Volvos like the XC70, S60R & V70R, and AWD versions of the XC90, S80, S60/V70, and S40/V50 use a system called Haldex to engage the rear wheels when the front wheels start to slip. 

^{A cutaway diagram of the Active On-Demand Coupling}

This Haldex system relies on a multi-plate clutch in the rear of the car, also called the Active On-Demand Coupling (AOC). When the system detects front wheel spin, valves open and allow pressurized oil to clamp the clutch down, hooking up the rear wheels and getting you moving again.

The system relies on oil pressure as high as 80 bar (1100psi!) to cycle the hydraulic clutch, and just like any system that pumps oil around, regular fluid changes are recommended. For Haldex, we suggest changing the fluid every 50,000 miles

_{A clogged (and failed!) Haldex pump}

If fluid changes are neglected, the Haldex pump filter screen can start to get clogged and the pump has to work harder and harder until it eventually burns out: you'll suddenly get lots of front wheel spin, and when scanned the car will have pump error codes from the DEM, such as DEM-0006..

This kit contains Genuine Volvo and Original Equipment Supplier to Volvo (OES) components:

• A BorgWarner haldex pump, with pinion flange nut
• A bottle of Rein haldex fluid
• A Genuine Volvo filter and filter cover with o-ring

Additional Keywords: AOC ACTIVE ONDEMAND ON-DEMAND COUPLER COUPLING AWD