Bmw 2007 e90 320I auto sedan gearbox makes terrible noise and; gets worse uphill

SOURCE: 2001 BMW 318i se Coolant

check the cap on the coolant ,i had same prob. if the cap is loose the level of water will change.tighten the cap it can be somthing as simple as that.

SOURCE: my '03 BMW 318ti engine misfires and the check engine light is on

check the HT lead

SOURCE: speedo & trip counter not working

Speedo has a loose or broken connection behind the gauge cluster.......Odometer needs to have the gears replaced ( inexpensive part), this part can be sourced on ebay or www.bavauto.com

SOURCE: High oil Consumption, BMW M5

Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!

SOURCE: My car makes a rattling sound under the car

Hey Thealmeidas!
Yep, there's a good chance some part of the exhaust system has come loose and is rattling at certain RPM's. Start fault-tracing by checking if any part of the exhaust seems loose to come in contact with anything, or if there's any loose clamps or similar parts hanging onto it. Another quite common reason for rattle is that some part of the exhaust manifold, such as a bolt or hose/pipe has loosened (often due to rust and/or corrosion).
Another possibility is that it's somehow related to the transmission (since you mention putting it into gear). If so that would be another subject.
Good luck!