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Vdo Oil Psi Sending Unit


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I'm wiring in a VDO oil psi gauge and just wanted to verify some things.There are two poles on the sending unit, G and WK. So im guessing the S line on the back of the gauge goes to WK? Then G goes to a ground, or does it go to the brown/green dummy light wire? Does the dummy light still work with this sensor?




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G is for Gauge, and WK goes to the warning light.  It should all ground out thru the engine block.


Oh, and yes the warning light works fine.  I believe it is more sensitive than the stock sender, though.  I think the stock sensor triggers the warning light at 5 psi, whereas the VDO triggers it at 15psi.

Edited by KFunk

Bring a Welder

1974 2002, 1965 Datsun L320 truck, 1981 Yamaha XS400, 1983 Yamaha RX50, 1992 Miata Miata drivetrain waiting on a Locost frame, 1999 Toyota Land Cruiser

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thanks to both of you! Without spinning it around the only number is 4.84 on the hex head part near the threads. Im guessing that's the psi?

No, the values stamped are in the metric system.  A 0-10kp/cm^2 is 0-150psig.  Alarm is 0.5kp/cm^2 is 7psig.  Don't know what the 4.84 represents, maybe it is a nominal 5psig because 6.77 is stamped on one here.

A radiator shop is a good place to take a leak.


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I think the 4.84 and 6.77 stamped on your senders indicate the date of manufacture...and I was under the impression that the VDO sender triggered the warning light at one atmos. (14.7 psi), not .5.  Lemme know if I'm wrong.



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All the senders I have are marked in bar- 0-5 for the gauge, for example, and .5 for the light  (corresponding to a 80 psi gauge and 7 psi

warning) or 0-10 for the gauge and 1 for the light...

(1 bar= about 15 psi)

...although I suspect the light has other possible values... but the gauges are usually 5 or 10 bar, no matter what the units on the scales...


kinda like temps are 125c or 150, with an occasional 180c...


what I seen



"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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