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545i low oil pressure warning light

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Old 11-04-2011, 08:27 PM
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I just wanted to share my experience with low oil pressure light in my 2005 545i (106k). It started last night on the way back from work. Lucky for me I was less than a mile away from home when it started. It was pretty random ? engine was running just fine and the light was coming on and off at high rpms and while idling.
Today I took out oil pressure switch and I discovered that it was leaking from inside. Oil was getting inside the plug and wire harness causing a short.
$12 + an hour later I have a new switch. I hope that will fix my problem - test drive tomorrow. Will keep you updated.
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Old 11-04-2011, 11:48 PM
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Originally Posted by dawid_w
I just wanted to share my experience with low oil pressure light in my 2005 545i (106k). It started last night on the way back from work. Lucky for me I was less than a mile away from home when it started. It was pretty random ? engine was running just fine and the light was coming on and off at high rpms and while idling.
Today I took out oil pressure switch and I discovered that it was leaking from inside. Oil was getting inside the plug and wire harness causing a short.
$12 + an hour later I have a new switch. I hope that will fix my problem - test drive tomorrow. Will keep you updated.

That is great. Where is switch located on the engine? Just in case I start having this issue.
Old 11-05-2011, 05:08 AM
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Originally Posted by dawid_w
I just wanted to share my experience with low oil pressure light in my 2005 545i (106k). It started last night on the way back from work. Lucky for me I was less than a mile away from home when it started. It was pretty random ? engine was running just fine and the light was coming on and off at high rpms and while idling.
Today I took out oil pressure switch and I discovered that it was leaking from inside. Oil was getting inside the plug and wire harness causing a short.
$12 + an hour later I have a new switch. I hope that will fix my problem - test drive tomorrow. Will keep you updated.
Good find ...
Old 11-05-2011, 05:14 AM
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That is good
But can you show us or tell where it is located and what is the procedure to replace it?
Old 11-05-2011, 08:01 AM
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Under the vacuum pump(just left of center looking at the engine, down about half way.)... I found if you remove or temporarily relocate the coolant expansion tank, you can get your hand in there without removing anything else.
Old 11-06-2011, 12:31 PM
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Originally Posted by seanjordan
That is great. Where is switch located on the engine? Just in case I start having this issue.
This should help

https://5series.net/forums/topic/101...4#entry1214104
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