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335i

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Question
Coolant light keeps coming on. 2009 BMW 335 xDrive
Hello. It sounds like there may be a coolant leak somewhere that is hard to find. It would be a good idea to have the coolant system pressurized and inspected for leaks. By adding pressure to the coolant system, it...
Question
Car stalling at first start, black smoke from exhaust
Hello. There are a few possibilities for why your car is stalling when you first start it. Your car’s coolant temperature sensor could be sending the wrong information to the PCM, which will cause the PCM to send the wrong...
Question
Coolant light keeps coming on
Hello. It sounds like there may be a coolant leak somewhere that is hard to find. It would be a good idea to have the coolant system pressurized and inspected for leaks. By adding pressure to the coolant system, it...
Question
Loss of engine power. 2007 BMW 335 xDrive
Hello. There can be several causes for a vehicle to lose power. It is possible that the crankshaft position sensor or camshaft position sensor have an intermittent problem. There could also be a problem with the mass airflow sensor being...
Question
is it required to change the compressor if its not functioning ?
If the compressor is the source of the noise, then yes, you will need a new compressor. As for what exactly is wrong with your A/C system, I can't speak to that without more information or directly diagnosing it. Most...
Question
Misfire, loss of power, CEL comes on... Replacing ignition coils did not fix
Hello. The numbers you have provided did not yield any results through my search. If the part numbers are different, and the ends are physically different, then they may very well be different coils or it may just be an...
Question
VEHICLE ISSUES
German luxury cars built in this century are very complicated. They have multiple electronic control units for different functions, one for the engine, one for the transmission, one for the brakes and half a dozen more for various body functions....
Question
Serpentine belt broke. Dealer is telling me it can wrap around crank and get into engine.What are the odds of that happening?
There is a possibility the belt can wrap around pulleys and the crank. I have seen pieces of belt get behind pulleys and a/c compressor clutches or crankshaft pulleys. If the mechanic inspects the old broken belt they can see...
Question
Difficult startup with a lot of idling when it's cold
One of the main things that can prevent a vehicle from starting in the cold is the battery. Batteries for automobiles are rated by cold cranking amps. This measurement is the amount of amperage the battery can produce at zero...
Question
Coil replacement - 2010 BMW 335i
Unfortunately, there is not enough information here to properly diagnose as a rumbling sound coming from an engine (especially a high performance engine) is somewhat normal in many cases. The service engine light could be on for many reasons. I...
Question
Wondering about upgrading car
Hi there, thanks for your question. I'd be happy to offer my insight. I would not recommend pushing the stock 335i motor to 16psi under any circumstances. The stock internals may possibly take 16psi for certain spikes in horsepower, but...
Question
I changed my fuse for the lighter a fuse fell ou next to it I put it back now car starts but will not drive could u help please
Without seeing the fuse box and which fuses fell out this may be tough to diagnose. Try checking the immobilizer fuses (12/37) to be sure they are in the correct place and not burnt. If this does not work, you...
Question
Oil filter housing leak affect turbos?
Hello. P112F is the trouble code for "Manifold Absolute Pressure to Throttle Angle - Too High (Bank 1)." If the computer detects that the ratio between the throttle and manifold absolute pressure readings is too high it will set off...
Question
Misfire and engine reduce power
When there are misfires under full throttle and there are performance modifications involved, the first potential issue to look at is a lack of fuel. You also state there is "no power going to the car when flooring it". I'm...
Question
No power. Only uses bank 2 to fire
Hi there. It would be helpful to know the year of the car in this case to supply the most accurate information. If it were the map sensor, then it would affect all cylinders. Try checking the spark plugs for...
Question
I can't get into the trunk to replace the battery
Hi - You should have a positive jumper point inside the engine compartment. It is usually located on the passenger side toward the front. You can hook up a jump box or jumper cables here and get power to open...
Question
My clutch is stuck. I can still change gears but with a grinding noise.
Hey there. Your clutch is hydraulically operated. The clutch slave cylinder uses brake fluid from the master cylinder to engage and disengage the clutch. If the brake fluid level is good and the return spring on top of the clutch...
Question
The Battery Light came up on my dash. I lost power steering and have no cold AC. What should I do and how much is it to fix?
It sounds like you may have lost a drive belt. When the belt goes, so does the alternator, the power steering, and the air conditioner. You should not drive the car like this, as the engine may overheat. You may...
Question
Does it use 92 octane
There is a good chance this vehicle was designed to run on 91 or higher rated octane fuel. To find out for sure, check the sticker on the fuel filler door, read the owners manual or contact your local dealer...
Question
How do I know if it is the Water Pump or thermostat that needs replacing?
In your question, you have not stated the "fault" you are experiencing, consequently I will assume it is overheating. If not, please write back in with clarification so that we can best assist you. There are a myriad of causes...

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