oil flow or oil pump problem

hello i hope somebody wil help me, after i take my 735i for a wash and cleen-up, when i drive away the bmw shut off completly and alarm go's off. i remove battery gable and re conect it, and the bmw came on and starded again, i drove off after about 4km the oil light came on, and stay on. how can i besure that the oil pump is default and where is the oil pump, some people say the pump is in the sump, some say it's in front off the engine. if it is the pump can i replace it without pulling the engin. thanks.

i would look into this before you change the oil pump. sounds more like an electrical issue than oil pressure.when was the last oil change? do you hear any exessive noise frome the top end?

i would look into this before you change the oil pump. sounds more like an electrical issue than oil pressure.when was the last oil change? do you hear any exessive noise frome the top end? oil change just before the car wash. No engine noise

did this start when you washed the car or has it been a problem?

did this start when you washed the car or has it been a problem?

in the past before the wash the oil light take's about 30 to 40 sec to go dead, and only on the cold start, durring the day when i start her again the light go's dead.

how many miles are on it? oil change?

after the oil change about 2000km, the engine was done before i bought her 7 month ago by the prev. owner

First off, what chassis model is it? E23? E32? E38? Would be good to post that info so we better know what we are up against...:) Some one might suggest checking something that your car doesn't even have or doesn't even apply...

The engine compartment has ton's of electrical connectors...I hope you didn't clean the engine bay with water or a pressure washer?:banghead:

Beside the battery terminal under the hood(bonnet) (my E32 750 has one), there's another connector. I accidentally unplugged mine once and my car came up with C/C messages about the oil. It shut off subsequently and would not start. I just happened to see it unplugged when I looked in the engine compartment and plugged it back in...the rest is history...

If you need pictures, I'll take some in the morning...but on my E32, it's a beigey rectangular connector...

Hello, it is a e32 735i 6 sillinder. No it's not been wash under the hood, if i turn the key starts every time, it is just the oil light dont go of. i open the oil cap yesterday and look inside the top look dry inside. Thanks for sites you posted, every bit of info can help.

i open the oil cap yesterday and look inside the top look dry inside.
You mentioned that the oil has been changed...and we logically assumed the correct amount of oil was replaced for regular use of the car. As you said, it looked dry inside. I assume you've checked that there is the correct level of oil in the engine?

I think there is an oil level sender...it's possible the connector to this sender might be dirty or corroded. I don't know where it is in your case but this might be something to consider.

There is a "storage" oil level where the car can sit for longer periods of time without the corrosive properties attacking certain seals. However, there is enough oil in the engine to start the car every week or so (as recommended in most situations) to lube the seals and components and/or move the car if needed, but not good for every day driving or regular short trips. That's why I ask if the engine oil is at a level high enough. A car will burn a small amount of oil when it's running.