Oil Pressure Sender Replacement:

This is probably one of the easiest DIY (Do It Yourself)repairs on the Z. I had to replace my faulty, worn out oil pressure sensorwhen the oil pressure gauge started reading low. I am told that the oilpressure sensor is a common problem on the Z's. This procedure is basedupon my 1990 non turbo.

Part Numbers:

25070-30P01 - Oil pressure sender (TT, not sure if NA is different)

Tools Required:

10 mm socket and socket wrench
17 mm open end wrench

Scheduling:

During an oil change or any other time the oil is drained from the car.Note: the job can be done without draining the oil -- which, by the way,is how I did it -- but I don't recommend that. It's very messy.

Preparation:

Jack up the car using all normal safety precautions
Drainthe oil and Remove the oil filter

Procedure:

1. Find the sensor. It's right above the oil filter (1. dot is onthe sensor). 

2. Remove the deflector (2.). This will allow easier access tothe oil pressure sensor (2 x 10 mm). This piece might only be on NAs. 

3. Unplug the connector (3. yellow dot) on the sensor by pulling back the rubberdust boot and push in the tab that unlocks the connector. Go ahead andclean off any corrosion on the contacts at this time. Remove the oil pressuresensor using a 17 mm open end wrench (3. red dot). Note: I did this without draining the oil so my oil filter (1.the big blue thing) is still installed and tends to get in the way.

4. Install the new sensor, plug in the connector, replace the deflector,and finish your oil change.

Note: If you're going to do this without changing the oil, here are a fewtips:

1. In order to unscrew the old sensor and screw the new on in, put thewrench up high, near the exhaust manifold. That way there's a little moreroom to turn the wrench and the filter is not in the way. 

2. Have the new sensor on hand when you pull the old one out becausethe oil WILL start pouring out of the hole! Otherwise, you'll have to stickyour finger over it and hope someone is around to hand you the new part!;)


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Article submitted on 1 May 2010
Last modified on 4 May 2010
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