Whining noise coming from back on my 316i e46 bmw could the oil in dif be low..

Question edited for clarity. MAKE!
Question moved to Category.

https://www.google.com/search?q=bmw+325ci+vs+bmw+325i

325i

Fuse Box Diagram BMW 3-Series (E46; 1998-2006)

https://fuse-box.info > bmw > bmw-3-series-e46-1998-...
Here you will find fuse box diagrams of BMW 3-Series 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 and 2006 (316i, 318i, 318d, 320i, 320d, 323i, 325i, 328i, ..

Ci, Cabriolet

1998-2006 BMW 3 (E46) Fuse Box Diagram

https://www.e46fanatics.com > ... > E46 > E46 General
Oct 29, 2018 - Mine still has the card that identifies all the fuses but that is a good reference if yours is missing. 2002 BMW 325Ci Cabriolet Automatic, 140K ...

..

Fuse Box Diagram BMW

https://fuse-box.info > Home > BMW
Fuse box diagram (location and assignment of electrical fuses and relays) for BMW 3-Series E46 (316i, 318i, 318d, 320i, 320d, 323i, 325i, 328i, 330i, ...

• 
  

  Fuse Box Diagram BMW 3-Series (F30/F31/F34; 2012-2018)

  https://fuse-box.info > bmw > bmw-3-series-f30-f31-f3...
  Fuse box diagram (location and assignment of electrical fuses and relays) for BMW 3-Series (F30/F31/F34) (316i, 318i, 320i, 328i, 330i, 335i, 340i, 316d, ...

check coolant and oil level if in morning at start or if been idling for a while == condensation being burnt off ----if coolant was low or oil has a chocolate milk look or alot of white smoke =possible head gasket blown or other head problem

Are u using the right juice? CHF 11s

well this depends on what engine you have, i have a 316i e46 and has a 1.9ltr engine, if that is the same it might be the engine thermostat has stuck and need replacing, thats the good news, the bad news is it could be your head gasket, 1.8ltr engines were prone to blowing the head gasket, look in the rad water bottle to see if there is any oil residue in there, and also take off the oil filler cap to see if its a creamy colour thats your worse senario, but its proberbly just the engine thermostat

What you are hearing is ground loop interference. If you have an aftermarket headunit/amplifier this is a common occurrence. A ground loop isolator in line with the low level amplifier inputs should solve the problem. Otherwise, it may be a malfunction of the stock cd unit or amplifier. BMW used a balanced input on some of the stock amplifiers, which would make ground loop interference all but impossible.

dont understand if it was the diff the noise would be their all the time like a whining noise sounds a bit like a wheel bearing or drive shaft or a bush bmws are prone to this hope ive helped you

hate to be the bearer of bad news, but i think your head gasket has failed causing the oil & water to mix in the engine. usually, the water enters the oil causing the milky cream liquid (check the under side of the oil fill cap for this same creamy liquid) and you wind up adding coolant since it gets low.

if the coolant is not getting low, then it may not be anything to worry about. in the colder months, BMWs have been known to display this creamy liquid on the oil cap. it disappears when the weather gets warmer. BMW has a service bulletin on this.

have a compression check done on it to see if this is truely the case. i hope i am wrong. and 1 pint every 2-4 thousand miles is not too bad.

171; check, fuel supply system short circuit to b+

check positive (b+) connections in fuel rails, fuel pumps, fuel injectors, etc....

i have a hose that is broke on my 316i but i need a dwawing of my engine to identify the part .