Oil Trap, Breather Box, *Oil Separator membrane only* for
Volvo models P1 and p 3 ,with 5 cylinder gasoline fuel injected engines. This diaphragm installed inside of the oil separator breather box assembly of the 5 cylinder P1 and P3 cars. When the diaphragm is ruptured and torn it results in loud squeal noise from the engine, lack of power, rough idle at slow speeds , and engine stalling at the intersections.
You absolutely do not have to disassemble one half of the car to install a new oil separator box. You can only replace the damaged part of the oil separator. The replacement procedure calls for a simple removal of the plastic cover and replacement of the membrane we are providing .
this diaphragm fits on inside of the oil separator with the part number 31338685 on the top cover

For all P3 five cylinder Turbo S60, V60, XC60 V70 and P1 five cylinder C30 C70 S40 V50 from engine 3285662-