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320i

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Question
Engine oil warning appears when turn off car
Hello. Thanks for writing in about your 2007 BMW 320i. I would have the battery and the connections at the battery checked. If there is any corrosion or a bad connection, then this will occur. If not, then it may...
Question
Sulphur blocking the catalytic converter
Hello. If you had an injector coil issue, then that will usually cause the converter to become clogged and fail. If it is clogged, then it needs to be replaced as driving it will not clear it up. You will...
Question
Seat belt sensors malfunction when car sits in heat
Hello. This is caused by the female part of the seat belt failing. The sensor in the receiver fails internally and will usually be susceptible to changes in temperature when it fails. It will need to be tested and replaced...
Question
My BMW e46 does not have a full power ?
Your issue seems to be temperature related. Taking too long to reach proper operating temperature can be cause by two things. First thing I would check is if either the electric cooling fan is running all the time no matter...
Question
My battery does not charge. It keeps on drawing power when I switch on the head lights, spot lights, and noise from the dashboard
Hi, thanks for writing in. If your battery is not charging properly and you are having other electronic issues with your vehicle, it is likely that your alternator may have failed. When your alternator fails that can cause lots of...
Question
BMW e90 320d jerking at pull away, and in 2nd gear, reduced power, turbo sound has changed.
Hi there. Since this occurred right after driving in some dusty conditions, I would check the air filter first. If the air filter is dirty then this will occur. If the air filter is fine, then I would also clean...
Question
Water was spilled in the trunk which soaked the car battery. Car won't start now. Does water destroy a car battery?
Hi, thanks for writing in about the concern with the BMW 320i. If the battery was submerged in water then it's completely possible for the battery to short out and die. Your friend will need to have the battery replaced....
Question
Car is randomly misfiring
There are a number of things that may cause this such as a faulty or dirty mass air flow sensor, a potentially a bad idle air control valve, or dirty fuel injectors. The mass air flow sensor is a unit...
Question
No oil but light didn't come on or stay on
Hello there, oil lights can be slow to respond to for a lack of oil in your 2004 BMW 320i. 10 liters of oil is excessive oil consumption. Excessive oil consumption is a problem and can damage your engine if...
Question
Why does my E46 BMW M54 not start properly?
Hello there, many faults will cause your 2003 BMW 320i to run poorly on cold start and have a cylinder 4 misfire. You have done great in replacing the coil packs, plugs, and vacuum pipe. Common faults would be a...
Question
Differential Noise
Hello. The noise you are hearing could very well be the differential. The fact it becomes worse when you accelerate is a good indication. The best way to tell is simply to do an inspection. Changing the oil regularly is...
Question
Misfire - 2003 BMW 320i
Hi there. Typically when a professional mechanic is trying to diagnose an engine misfire, the first thing they'll do is download any OBD-II error codes to pinpoint the source of the ignition issue. Without knowing those codes, telling you what...
Question
The rear window automatically comes down after closing it using the second stage on the switch.
Try this procedure for resetting the windows: with all the car windows fully closed, enter the car and put the key in the switch. Turn the key to the on position, but do not start the car. Lower the driver's...
Question
Battery light on while driving but then goes off?
This may be a sign of a failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage...

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