Water leak in trunk of bmw 750i - 7 Series BMW Cars & Trucks

Marc, Sounds like you need some new weather strip and an adjustment. Try rockauto for the seals.

you have found the problem your self , water leaking onto electrics , the two don't mix , get a mechanic to trace the leak

You do not say where the leak is; front, middle, or back of transmission.
There is a 210mm x 3mm o-ring and 128mm x 3mm o-ring for mating parts. There is a fill plug with o-ring on the side, a drain plug with o-ring and an oil pan gasket on the bottom. Common causes are age of the o-ring or gasket material, pinching of the o-ring during installation, or failure to have a clean surface for the gasket during installation. This assumes all fasteners have been properly tightened.

Holed exhaust they are prone to rusting with car running put ur hand over end exhaust sud blow ur hand away if in good order but if its go a hole u will b able to here were its leaking from

There are fuses that work with your dash. You can always check to make sure that's it's not blown out before you start spending money to have a mechanic check it out

Per TireRack.com, there were four tire size options for a 2007 BMW 750i starting at 18 inch going to 21 inch wheels. You will need to know what size you car currently has and whether they are staggered (narrow front/wider rear) or the same front/rear. You will also need to know if they are "Run flat" or regular. The site has good testing articles and ratings of various brands. The Uniform Tire Quality Grade number rates tire longevity (higher number lasts longer 100= approx. 7,200 miles) and the letters are for traction (AA is best) and temperature (A is best).
Continental Extreme Contact DWS is available in your size works well as an Ultra High Performance All Season.

check your glove box. there is a tab that covers your fuses. It should be located there

Hi marsnange,

One of the most common problems I see with the Z3 water leaks in the trunk comes from the 3rd brake light lens. You can open the lid, and check for a leak while pouring a little water around the lens. Another common leak is from the trunk seal itself. Look for tears,holes and any deformities in the gasket. The is a slight probability the antennae base could be leaking. The rubber based should not look cracked or deteriorating.

looks like you need an alternator

I have the same car. The dealership wanted to charge me $155 to go into the computer and give me the passkey.

One of the techs just told me how to find it myself:

Inside the trunk, on the left side behind the DVD player, there is a box that sits at a 45 degree angle. Right above that box, there is a box that is shaped like a VHS tape. Unscrew that box and on the other side you will see bluetooth PK: and your four digit number.

That saved me $155 dollars and now I can talk hands free through my car.