Question about 2003 BMW 3 Series

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BMW 96 328 IS 112k miles, computer goes on and off which obviously controls all air and heat; any suggestions?

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  • BMW Master
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I think maybe you have a problem with the cabin fan motor. First action is to check the fuse for the circuit, if its loose lighten the connetions....Do the same to the relay and also make sure that its function is correct. It may be defective....Regards Johngee

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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Heater in 2001 chevy tracker blows cold. when i switch from a/c(blue)to heat(red)i do not hear the (thud) like before. how do i repair myself? my mom is disabled & little $


You must remove the entire dash assembly to cure this problem. The cold air and no switch to heated air is a broken air temperature control bleed door is my opinion and most likely right.

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Climate control stopped operating (climate control panel won't come on at all) 2001 BMW 530i


It must be obvious that the system has either a shorted wire or some component in the system, it is a tough job to track down these shorts in a system, that goes 2X for German monsters. I suggest you have a professional look at this or join a BMW forum and ask if other owners have had this issue, I have never seen this problem on a BMW until this one you posted

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My 1988 bmw 325i had the entire a/c system removed will that affect the heat on my climate control also


Hi Vince.
No this shouldn't affect the heat on your climate control, as the air-con is a separate entity the heat is transferred from the engine, but the air-con cold is a complete unit on its own so should not affect heating the car, just cooling it inside. hope that helps

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Bmw series 1


get radiator cleaner put that in your expansion bottle .run it for about 20 miles to clean both the core for your radiator and core for your heater. then drain it .refill with 50/50 mix of anti freeze.put your heating on full .with the cap still off .run the engine till water starts to get hot .then refit the cap.

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I have bmw 318ci and the hot air is not working, the heater is blowing and set to max heat but only blowing cold air, i have checked the fuse box, any ideas??


The heater operates from the hot water from the engine cooling system flowing through the heater radiator which is inside the air ducts under the dash. I suspect that the control wire/cable that goes from the heater control lever has broken or become disconnected from the heater tap that controls the volume of hot water through the heater radiator. Some times there is also a flap in the air ducts that is operated by the heater lever tha varies the amount of air that is heated. The tap may be in the engine bay or tucked in behind the air ducting.

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Where is the timing belt on a 2001 BMW 325i??? Also, where is the ICV (Idle Control Valve) on a 2001 BMW 325i?


iac valve ( idle air control valve) its located on the throttle body, and timing belt, that year does not have a timing belt, good luck.

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1 Answer

BAS/Esp light on with diagnostic symbol


Hi,
As you may know, modern automobiles (from the 1980's to present) have at least one computer controlling them. This computer (or computers) control the fuel to air mixture via either electronic fuel injection or a feedback carburetor. On the newer vehicles the computer also controls the ignition timing (That's when the spark plugs fire).
The newer a vehicle is,the more stuff the computer(s) control. The newest vehicles have the computer shifting the automatic transmission or transaxle as well as controlling spark and fuel mix. Many vehicles also have a climate control computer which controls the A/C and heat. Luxury cars often have vehicle anti-theft controlled by computer: some even will adjust the seat and steering wheel to suit different drivers when they enter the car!!!
The downside to all this "smarts" on a car is obvious: what happens when something breaks? The good thing is that the onboard computers themselves are very reliable. The problem is that the computers rely on a whole flock of sensors and wires to give them the data needed to make your car run. These sensors are not nearly as reliable as the computer itself, in fact they fail quite often!
This is where a "limp home mode" comes into play. Whenever the vehicle computer gets a reading from a sensor that is obviously wrong, it will "assume" a value that it "knows will work". On the earliest computer controlled cars with feedback carburetors, if the computer got bad readings from sensors, it would run the carb at the richest setting. You would get horrible gas mileage, but the car WOULD run. The computer would then turn on an amber "CHECK ENGINE" light. It would also store a trouble code in its memory telling what sensor was giving a "bogus" reading.
The newer computers are much more sophisticated, and just because a "CHECK ENGINE" light comes on doesn't really mean the computer is totally in a "limp home mode". Depending on what sensor reading is out of specs the computer may still be doing a pretty good job of controlling the engine. For example, some cars can have the "CHECK ENGINE" light come on if you don't tighten your gas cap tight enough after filling up!
On most vehicles the "CHECK ENGINE" light will go out if the sensor starts giving normal readings again, although some computers will make you use a scan tool to turn the light off.
This basically looks like the sensor to me, try getting that fixed for good.
Kindly let us know for any future assistance.
Thanks
Fame !

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1 Answer

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I have the same fault , that has just occured out of the blue only 38,000 on clock.
Drives perfectly and brakes fine too.
Warning light indicates Suspension Stability control
but diagnosed as yours at the same cost.
Apparently quite a common fault with series 1 , but BMW do not tell you that !!

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change the pcv valve its under the intake manifold

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