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740i

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Question
Rough idle in cold weather.
Rough Idle could be caused by many things and is hard to diagnose. BMW have a known issue with the vanos solenoid that causes this problem. I would have the car checked for codes and have a technician troubleshoot the...
Question
Car overheating and not accelerating
As far as the thermostat causing the motor to sound muffled, I personally have never heard of such a thing. Your thermostat controls when the flow of coolant in your cooling system starts, allowing the coolant to flow and cycle...
Question
Q: Car not going over 20 MPH
Hello. If the car will not go over 20 MPH then there can be a number of issues going on. If the Check Engine Light is on then the computer needs to be scanned for codes first. If there are...
Question
After four alignments, car still dangerously pulls to right
Hello! I have not come across this issue specifically related to BMW's. However, what jumped out at me was the fact that two BMW dealership service departments aligned your 740i, took your money, and sent you away with a very...
Question
Wiring harness burned up from short circuit to disa valve
Wow! Very disturbing issues to experience, especially the electrical smoke with your family in the vehicle. Based on what you've told me about you 2998 BMW 740i, this is not going to be a quick one to diagnose and repair....
Question
Loss of reverse on a BMW 74 DI
If you are going to continue to drive it, you are going to need a new transmission, or you either park where you never have to back up. I said that to a customer with a BMW who did that...
Question
The oil temperature remains at 140F
Hi there. In most cases where the temperature gauge is not working, it's due to an electrical issue; either a blown fuse or an engine temperature sensor is not working correctly. It would be a good idea to have a...
Question
Car runs rough, turns itself off & shakes
Hi! How very frustrating to spend money to have your vehicle repaired and then it's still not fixed! Fortunately you have some warranty on those repairs and can return to the BMW dealership and express your dissatisfaction with their inability...
Question
I have water in my engine oil, is the engine okay?
There's no good spin I can put on this. It's very likely that you've done some damage to your engine. The oil circulation is pretty high, so it's almost certain that the water was stirred up into the oil and...

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