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740iL

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Question
Car takes 2-3 tries before starting
A few different things can cause the vehicle to have camshaft sensor codes. The most common would be the failure with the camshaft sensor, timing chain damage, improper timing, or a wiring issue. The Check Engine Light should illuminate when...
Question
Screen is white & blinking on small screen navi
Simply disconnecting the battery should not have any adverse effects on the vehicle. The exception to this is if the battery was hooked up backwards, this could cause strange electrical faults. The most likely cause would be a wiring issue,...
Question
Warning lights after ABS brake flex lines replaced
The ABS and brake light warning switch are on different circuits and do not work with each other. The most likely cause of the Check Brake Light message would be a wiring issue, failed bulb, improper bulb, or a brake...
Question
Car makes scraping sound and rattles
Replacing the transmission fluid and filter is part of the manufacturer's recommended service that should be done at intervals for regular maintenance. The transmission can have issues such as this when it is failing, low fluid level, torque converter malfunctions,...
Question
Two new xenon light bulbs burn out instantly as soon as they are turned out.
If the old bulb wasn't burnt out by the ballast, the new ones shouldn't either. The most likely cause of your woes are the cheap bulbs. I would strongly suggest only purchasing name brand bulbs. They may be much more...
Question
Car in drive push gas gets no power
If the engine won't even rev when the transmission is in drive, then there could be a problem with the transmission itself, or with the engine control module or transmission control module. If it revs up but doesn't go anywhere,...
Question
Screen is white & blinking on small screen navigation
When you disconnected the battery, was the screen on at the time? You may have given the screen a voltage surge and burned it out. Have a mechanic check the screen out to see if the unit is bad and...
Question
Car takes 2-3 tries before starting
You will need to have a mechanic check out both the codes to see if you have a problem with both sensors or have a problem with the timing of the engine is out of position. The codes suggest both...
Question
Smell coming from A/C vents
It sounds like you have a leaking heater core inside the evaporator housing and would need to have it replaced. If you have the heater bypassed then you will not have heat inside the car and the temperature control will...
Question
Car takes 2-3 tries before starting
You will need to have a mechanic diagnose both the codes to see if you have a problem with both sensors or have a problem with the timing of the engine being out of position. The codes suggest that both...
Question
Car makes scraping sound and rattles
Hi there, thanks for writing in about your 2001 BMW 740iL. It sounds like you have more than one problem here, and the scraping noise can be something dragging or rubbing and can only be checked and diagnosed in person....
Question
Warning lights after ABS brake flex lines replaced
The rear lights, including the brake lights, all go through the light control module and should have nothing to do with the ABS system. You may have bad bulbs. Have them checked to see if one or more brake lights...
Question
I'm wondering what would cause my car not to stay when it is warm , I'm changing all pre and post cat sensors today. No power also
Hello there, a variety of faults can cause your 1996 BMW 740iL to not start when cold and run rough. Without knowing the exact code I can only give general advice. A lean condition can be caused by many faults...
Question
I think the guide rails were bad and it just quit. Loss power while traveling.
Hello. To confirm your previously given advice, yes, your engine does have long-term timing chain guide maintenance requirements. The early noise you heard was the timing chain having worn through the plastic guides, and possibly the chain "slapping" due to...
Question
Engine out of time - 1997 BMW 740iL
Hello there, an improperly timed engine can result in serious damage to your 1997 BMW 740iL. When the timing is not set properly, the risk is if the timing is far enough out of the valves can come into contact...
Question
My Bmw will not crank or start.
Hi there: It is very possible that the battery might be fully charged, but be lacking cold cranking amps. As a battery ages, the cells inside will begin to wear out, causing a reduction in the amount of 'cold cranking...
Question
I have white/bluish smoke coming out of the exhaust occasionally. I have no power loss and it happens infrequently.
I suggest you study the smoke and try to recognize a pattern. It might mean that you have to spend a lot of time looking in the mirror, so try not to be unsafe. If you are having a problem...

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