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320i

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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...
Bmw 318i overheating problem. Fan, thermostat alright and no coolant leak. Noticed thin white smoke at idle as car overheated.
It is possible that you could have a restriction in the radiator causing a hot spot. I would recommend having your radiator checked with an infrared temperature gauge to determine if any spots on the radiator are significantly hotter than...
BMW 2014 320i shakes, jerks and pulls back while driving. What to do?
The vehicle engine should be diagnosed on a scope (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection). It is also possible that the poor running condition has already caused diagnostic trouble codes to set and those codes can be downloaded and evaluated by the mechanic. There are...
Valvetronic operation on N42 engine.
The valvetronic motor is stuck or not functioning properly and causing the engine to not start up. I recommend replacing the valvetronic motor. The motor is designed to cycle itself when turning on the ignition, so it is good to...
Car wont start after tipping on side
I'm still suspicious of the Battery Safety Terminal. I would take a really good hard look at that to be sure you aren't missing something. Otherwise, there may be some kind of problem with driver authorization or some other safety...
Car starts on cold mornings, then shuts off while driving
It sounds like you've been addressing a number of issues. Of the parts that you have had replaced, only the crankshaft sensor would be one that would be likely to cause your car to shut off while driving. You could...
Aircon blowing out white stuff.
There shouldn't be any dangerous materials in the AC system. But it is possible that you have a buildup of dust or even mold. Your car has a cabin air filter that is supposed to keep anything out of the...
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 (https://www.yourmechanic.com/services/ignition-coil-replacement), plugs (https://www.yourmechanic.com/services/spark-plugs-replacement), and vacuum pipe. Common faults would...
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...
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....
car starts and 10 seconds laters dies however starts again and drive good
You will need to have the fuel pressure checked to see if the fuel pump is holding pressure over time and not leaking down. You may need to replace the pump and filter.
Car running below operating temp/ check engine light
Hi there. The code you've listed is commonly associated with a temperature control system failure - not necessarily a problem with the radiator thermostat. There are a few easy things you can do to begin the diagnostic process. Check the...
My Electric water pump on my 2014 320i BMW runs constantly after shutdown. Drains the battery dead after about five hours. What
The electric water pump circuit uses both a temperature sensor and a relay to control it's function. The temperature sensor tells the water pump there is a demand for it to circulate coolant based on engine temperature. The relay acts...
Oil light doesn't go away
Hello there. If the oil light that you are referring to is the oil change warning light, it might be possible that a code is stuck in the ECU, which is why completing the manual reset may not be working....
BMW in Limp Mode
Your car has an electronically controlled transmission. If the controller sees a failure in any of the components, it will go into limp home mode to enable you to continue to drive the car but it will not work as...
My BMW 320i has smoke coming from the left side of the engine
You could have a small oil leak or even a coolant leak. When the fluid drops on a hot surface, it burns or boils. Coolant and oil leaks are easy to distinguish if you can get where you can smell...
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 (https://www.yourmechanic.com/article/how-to-read-and-understand-check-engine-light-codes-by-jason-unrau) to pinpoint the source of the ignition issue. Without knowing those codes, telling you...
Car is randomly misfiring
There are a number of things that may cause this such as a faulty or dirty mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement), a potentially a bad idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement), or dirty fuel injectors. The mass air flow sensor is...
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...
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...

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