The Volvo Parts, Accessories &
Performance Specialists Since 1963

Oil Filter Separator Box Diaphragm - P1 & P3 5-cylinder

Aftermarket - 140065

In Stock
Item Number
Brand Classification
Units Per Car
One Year Parts Warranty
Country of Origin
Product Group
Repair & maintenance
OE References
Genuine Volvo - 31338685, 30684381, 30788494, 31338684

Product Description

This is the cute little diaphragm that goes inside the oil seperator/breather box assembly on most of the 5 cylinder P1 and P3 cars. When this diaphragm is compromised or torn it results in the famous "idle squeal of death" while stuck in daily traffic.

There was a chassis break early in the P1 cars but any cars that have had PCV dealer service are likely updated to the later style. If your early car has been updated to the later style box (indicated by part number 31338685 on the top cover) and the diaphragm has failed again, this is the diaphragm that fits 31338685.

For all P3 five cylinder Turbo (S60/V60/XC60/V70) and P1 five cylinder (C30/C70/S40/V50) from engine 3285662- onward.

Additional Keywords: FLAME TRAP SQUEAL PCV

Potential Product Fitment Issues

For all P3 five cylinder Turbo (S60/V60/XC60/V70) and P1 five cylinder from engine 3285662- onward. This is most easily identified by checking for the electrical connector on the box for the heater element. The early oil separator box did not have a heater element. The later box (or cars that have been updated) has an electrical connector which may , or may not be wired to the engine harness.

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