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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old Today, 10:40 AM
e11world e11world is offline
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Question Oil light is on after turning car off and level is fine

Hi all,
My first post here. I noticed for the past 2 weeks that my oil light comes on after I stop and turn off my car when I get home (yellow light) but it doesn't happen all the time. I can say maybe more when I drive faster (especially for uphills) but when I check the levels are fine and I can't even put anything in.

The level stick indicator is not always the same, sometimes it's says it's low but when I want to fill it, it's already full. Any ideas?

325i BMW 2004 e46 is the model with about 135000 km on it.
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  #2  
Old Today, 10:42 AM
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MalibuMafiaV MalibuMafiaV is offline
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Mein Auto: E46 stg 2.5 & E60 M5
Yellow oil light?. Your level sensor is broken. It's at the bottom of your oil pan. Mines been broken for years. I'll never replace it since I can check my oil manually with the dip stick.

Basically the light will go on when you start the car. Then it'll go off in a few moments after driving off.
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  #3  
Old Today, 10:47 AM
e11world e11world is offline
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You're right. It comes on with other lights when I turn on the car and goes off normally but it was worrying me when it comes on after I stop and turn the car off. It stays on for about 30 seconds then goes off again.

So should I even bother fixing it?
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Old Today, 10:50 AM
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MalibuMafiaV MalibuMafiaV is offline
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Quote:
Originally Posted by e11world View Post
You're right. It comes on with other lights when I turn on the car and goes off normally but it was worrying me when it comes on after I stop and turn the car off. It stays on for about 30 seconds then goes off again.

So should I even bother fixing it?
Like I said. I haven't fixed mine for years and I do mean YEARS like over 3 at least

It's up to you. If you want the light to work or not. The part is $80s and I'd prefer to spend that $80 on an oil change considering oil and a filter for our cars is only $60s. That means $20 left over for beer!.

If your oil level is fine on the dip stick? your good.
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  #5  
Old Today, 11:07 AM
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3LOU5 3LOU5 is offline
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If you decide to fix it, it's an easy DIY.

Take the belly pan off (Dzus fasteners, iirc). Two, maybe three bolts, unplug the electrical connector, and replace it.

Oh yeah, just make sure you drain the engine oil PRIOR to doing this.

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  #6  
Old Today, 11:10 AM
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It`s no big deal....the oil sensors are known to be extremely sensitive....try adding an extra 1/2 cup of oil, that should do it. If not, raise the level by 1 cup total.
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  #7  
Old Today, 11:31 AM
e11world e11world is offline
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Thanks for the tips everyone. The dip stick is also what threw me off since it showed different levels at different times.

I guess I may leave it especially since it's not happening all the time. Like I said, I can tell it happens more when I drive faster and press more on the gas when going uphill so this was my only worry.
If I do fix it, it will be on my next oil change probably.
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  #8  
Old Today, 11:48 AM
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The dipstick will read erratically if the car hasn't sat for a while after being shut down. When you first shut down a lot of oil is in the galleys, head, etc and it takes time to drainback to the pan fully. Never check it within 30 min of shutdown so you get an accurate reading.
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Old Today, 12:40 PM
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In the future, at oil change time, be sure to add exactly seven quarts of fresh oil, wait a half hour for everything to settle in, and then check the level on the stick, making a careful note (hand-drawn diagram, photo, or scribe a new "FULL" line on the stick) so you have a correct reference point with fresh oil in the engine.
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