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V8-4.4L

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I am trying to diagnose an E706 mux-4 bus error in my climate control system
Normally a bus error indicates that a fault has been detected between the control module and the actual system in this case being the climate control. There is usually no communication between the module and the system when there is...
Question
1998 bmw 740iL replaced ignition switch and battery now no crank no start
It sounds like you may have an improper connection somewhere either between the battery and the starter or potentially an ignition switch or relay that may not be getting the proper connection. I would suggest having a professional from YourMechanic...
Question
i have a 2002 bmw 745li and im getting a message that says trans range N only when engine is on i just had trans service done
It is very possible that transmission damage could have occurred when the transmission overheated. This can only be determined usually by removing the transmission and checking all parts thoroughly. In this situation I would recommend having a transmission inspected by...
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...
Question
Hey Patrick I'm looking to buy a BMW 745li 2002 and there are a few small things wrong with it. The front grill is busted, it need
You should have a (pre purchase inspection)[https://www.yourmechanic.com/services/pre-purchase-car-inspection] by a mechanic like one from YourMechanic to get an idea of the shape the car is in and to see if it was possibly wrecked or has major mechanical problems.
Question
My 2001 BMW 740 IL Transmission Failsafe light came on when I put the car into drive
Your car has an electronically controlled transmission. If the controller detects a fault in the transmission it goes into failsafe mode to "work around" the problem. It might for instance skip a gear that it finds to be a problem...
Question
Where is the a.c. compressor located on a 2006 range rover hse
The relay is in the main under hood fuse box and that box is typically right next to the battery. If you suspect an issue with the relay it should be tested prior to condemning it. Such testing is straightforward...
Question
WHERE IS THE CRANKSHAFT POSITION SENSOR ON THE 2004 BMW 745LI?
The crankshaft sensor is located on bottom right of transmission bell housing.
Question
Loud metallic rattle from engine area drivers side 04 745i. Seems like broken cat conv. Or bad belt tensioner any ideas?
It sounds like the belt tensioner may be cracked or broken creating a lack of proper tension on the belt. This can cause a bit of rattling depending on how tight the other components are as well as how the...
Question
I have a 03 BMW 745i I was running fine untell I park it over night an when I wake up to start the car it crank put don't start
Hi Tevin. Thanks for contacting us tonight. If you can engage the starter (meaning it cranks over) but will not start, then it's either a fuel or ignition system failure. Some of the common components that can cause this include...
Question
TIMING CHAIN BREAKS IN A 740IL WILL IT BEAN A VAILS
Hi Curtiss. Thanks for submitting your question. I'm not quite certain what to advise, but generally speaking, when a timing chain breaks, it typically causes significant internal engine damage. Although these issues can be fixed, it is typically more cost-effective...
Question
745 2003 starts but won't switch gears
Hi there. Thanks for contacting us today. There are several things that could cause your BMW to have shifting issues, ranging from small things like a transmission fluid obstruction to torque converter issues or inner transmission seal damage. The best...
Question
Issue is location of Suspension Compressor and ability to change it at my location considering weather. I don't have a garage.
It shouldn't be a problem to replace the compressor in your carport. Your technician will be equipped with the necessary jacks and stands to access the underside of the car. If you have any misgivings about whether it can be...
Question
I changed my foglights to led's and when I tried to start the car it did not start all kind of photo showing up and my I drive scr
Hello, thank you for writing in. The first thing to check is the installation. Make sure the power supply was hooked up correctly, as LEDs are polarized and must be wired perfectly. Secondly, you want to make sure the wires...
Question
Do I have to buy a new transmission ?
What you are describing is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...
Question
I have a 2005 545i on my dashboard it had a key with a line through it at warned me if you turn off the car it may not start it
The "key" warning symbol means that a fault has been detected in the anti-theft system; the ignition switch itself is not typically the "cause". Faults in the CAS unit (Control Module Car Access unit) can potentially develop but there is...
Question
2006 RR 4.4l got a P0628 fuel pump low voltage, both relays are good both fuses are good no voltage to signal relay to close and r
If the relay is not being powered, trace the circuit backward to the power source using the factory wiring diagram. You will find the interruption, or the faulty control module, if applicable, using that strategy. A similar procedure has to...
Question
P0505 code Idle Air Control for bmw 540i
The TPS can have between 5 and 10 different codes and all will be caused by different failures of the TPS, Throttle body, wiring or computer issues and you will need to supply the code you get to help you...
Question
Car won't start after battery replacement
I would suggest having the alternator checked to determine if it is receiving the proper amount of voltage from something called the voltage regulator. The voltage regulator regulates the charging voltage that the alternator produces, keeping it between 13.5 and...
Question
Smoking from under the hood
The smoke could be from leaking oil that is dripping on a hot engine part, such as the exhaust manifold, and then vaporizing. An antifreeze leak is also a possibility. To resolve this, on a mobile basis, right at your...

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