Oil Pressure Sensor: Service and Repair

Removing And Installing/Replacing Oil Pressure Switch (S62)

Switch off ignition.


NOTE: To prevent excessive oil discharge when the oil pressure switch is removed, it is essential to drain the main flow oil filter.


CAUTION!
Do not damage main flow oil filter cover.
Release and tighten down with a socket only.







The following work steps are shown using the E39 as an example. The installation location of the main flow oil filter cover (1) is different in the E52 than in the E39. Otherwise the same procedure as for the E39 applies.







When the main flow oil filter cap is opened, engine oil flows from the oil filter housing back into the oil sump.
Open main flow oil filter cover and remove.

Installation:
Tightening torque, 11 42 2AZ.







Installation:
Replace 0-ring (2) and coat with oil.







NOTE: A small amount of engine oil emerges when the oil pressure switch is removed. Have a cleaning cloth ready.


Disconnect plug connection (1).
Unscrew switch.
Tightening torque, 12 61 1AZ.


NOTE:
Assemble car and set in horizontal position.
Start engine and run at idle until oil indicator lamp goes out.
Switch off engine and wait approx. 5 minutes.
Then check engine oil level.
Top up engine oil if necessary.