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  #1  
Old 09-10-2014, 09:13 AM
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Oil pressure switch leaking - which part number to replace it with?

Well - I believe I have finally found the source of the remaining oil-leak on my X. It looks like it's the oil pressure switch

I did some poking around last night on a couple websites and found 4 different part numbers which all claim to be the same thing....I was not able to locate this part on realoem.

So the question is - what's right and why so many variations? Ecstuning alone lists 3 different part numbers.

I assume the different part numbers could have a different spring in them - thus operate differently? I don't have the part numbers handy - they are written down at home.

The last leak! (For now) Woo hoo.




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  #2  
Old 09-10-2014, 09:37 AM
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Realoem has 2 p/n: 12617568480 & 12617620512, both marked as "ended". ECS Tuning has the former (FAE brand).
Here is the realoem linky. Item # 13.

This is located in the right front of the engine, on the side and below the upper timing plate (gasket). Your pic is a bit misleading, and at first I thought you have a shot of the T-stat adapter for the oil cooling, in which case you need an O-ring (this here in realoem - item #2).
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  #3  
Old 09-10-2014, 09:41 AM
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Found it


#Part Number Description lb(weight) QtyEach needed
01 12147506273 PULSE GENERATOR, CAMSHAFT (to 03/04)0.04 4 NA 12147506273 was superseded by 12147518628.
01 12147518628 PULSE GENERATOR, CAMSHAFT0.07 4 $119.39
02 12142295386 CRANKSHAFT SPEED SENSOR (to 10/06)0.05 1 $120.38
03 12141709317 PING SENSOR (to 07/06)0.28 1 NA 12141709317 was superseded by 12147568421.
03 13627568421 PING SENSOR0.29 1 $136.43
04 12617506689 OIL LEVELLING SENSOR (to 09/05)0.34 1 NA 12617506689 was superseded by 12617540351.
04 12617540351 OIL LEVELLING SENSOR (to 07/06)0.34 1 NA 12617540351 was superseded by 12617567723.
04 12617567723 OIL LEVELLING SENSOR (to 07/10)0.33 1 NA 12617567723 was superseded by 12617607910.
04 12617607910 OIL LEVELLING SENSOR0.33 1 $208.13
05 12611730160 OIL PRESSURE SWITCH - M12X1,50.08 1 NA 12611730160 was superseded by 12611710509.
05 12611710509 OIL PRESSURE SWITCH - M12X1,5 (to 10/06)0.08 1 NA 12611710509 was superseded by 12617568480.
05 12617568480 OIL PRESSURE SWITCH - M12X1,50.09 1 $11.93
06 31422310687 FILLISTER-HEAD SCREW - M6X160.02 1 $1.78
07 07119913662 HEX BOLT - M8X30-ZN0.04 1 $0.76
08 07119904023 HEX NUT - M6-ZNS3 3 $0.50
09 12141748398 O-RING - 17X3 1 $1.68
10 12611744292 GASKET RING 1 $5.27
11 12527507258 SOCKET HOUSING - 3 POL.0.02 1 $2.86
12 12527508155 SOCKET HOUSING - 3 POL.0.02 1 $3.28
13 12521427964 SOCKET HOUSING - 4 POL.0.02 1 $3.60
14 12521427615 SOCKET HOUSING - 2 POL.0.02 1 $1.

Notes: all this info can be found at www.Penskeparts.com
All the superceeded parts numbers, new designs, extended applications.
12618611273 Aftermarket - Oil Pressure Sensor - FAE 12617568480 - Free Shipping $6
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Last edited by StephenVA; 09-10-2014 at 09:48 AM.
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  #4  
Old 09-10-2014, 10:56 AM
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Yeah. The picture is a bit misleading and it's not the best. It's turned a bit - I took this from the bottom - looking up at the underside of
The vacuum pump and upper
timing cover. Sure looks like that's where the oil is coming from. I don't think it's coming from anywhere higher

I've replaced the timing cover gaskets, valve cover gaskets and both seals in the vacuum booster pump.


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  #5  
Old 09-10-2014, 11:12 AM
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Thanks for those links. Maybe I need to look a little more closely to see if it's the oil
pressure switch or o-ring as you were suggesting. I'll take the intake off and see if I can get a better look down there....


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  #6  
Old 09-10-2014, 11:13 AM
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Here's another shot I took last night.


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  #7  
Old 09-10-2014, 11:46 AM
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Looks like the oil pressure switch.
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  #8  
Old 05-17-2019, 08:43 PM
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Question 2005 X5 4.4i N62 Oil pressure switch leak

Hi guys, I believe I have the same issue. Mine is pumping oil up through the electrical conduit to the top of the engine. The underside of my car is a mess. I found a youtube video of the same issue pumping the leaking oil out of the conduit at the top of the engine. Did this happen to you? Were you able to look under the engine top covers? cheers James
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Old 05-18-2019, 02:14 AM
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These switches are notorious for failing (and leaking) - the same part is even used on BMW motorcycles, with a similar failure rate and mode.

It's cheap (especially if your can source an aftermarket part - and mostly likely it'll last longer too!) and easy to replace. If your has oil on it, it needs replacing regardless, so just replace it and see if that sorts your leak.

On my BMW Motorcycle, I used a Tridon branded unit after having three "genuine" switches fail on me.... no issues in the 5-6 six years since.
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Old 05-18-2019, 05:09 AM
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How is it that they can pump oil against gravity up the inside of the electrical pipe to come out the top of the engine where the electrical wires come out? Your not supposed to see oil coming out there.
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