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Coolant Smell In Interior (Cabin) – Leaking Heater Core – E32 & Others

Q The latest article cover smelling gasoline but my question is this:
Sometimes I get anti-freeze smell inside my 1990 735i and sometimes I get an overheat warning with the temperature gauge red lining if I don’t turn on the heat quickly. I am going to change my thermostat this weekend but are these related?

A
If

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BMW E39 525i, 528i, 530i, 530i, M5 – Blower Final Stage Unit (Resistor) Replace

Q
car year: 2000
car model: 528i
How do your remove and replace the blower motor final stage resistor pack.

A
On later model BMWs, when the heat & A/C blower motor seems to have a mind of its own (erratic and/or intermittent speed operation), the most likely fault is the Blower Final Stage Unit (also called, blower resistor).

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BMW E36 Cabin Filter / Microfilter / Micro Filter Replacement

Q
How do I replace the cabin air filter in a 1995 BMW 325i. Can you send me a diagram?

A
We don’t have any real written instructions for the microfilter install for your 325i. I can certainly give you a few pointers though. The microfilter slides into the heater box from the passenger side footwell area.

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BMW Heat & AC Blower – High Speed Only

This answer is applicable for many BMWs in addition to the one listed below.

Q
1987 325es
The fan blower only works on high and makes a sound as though it is hitting something. What’s the fix and how difficult will it be?

A
If your blower assembly sounds like it is hitting something, this may be due to

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Heater Blower Motor/Resistor – 1994 BMW 530i E34

Q
My heater fan stopped working. So I called (800) 535-2002 and they told me that the blower motor resister goes out on these cars and asked “hows your micro filter?”. They said the parts install behind the glove box. So I ordered the parts, dropped the glove box door down, and

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Heating Issue – 1985 BMW 325e E30

Q
My heater isn’t working, however the blower is fine. Any suggestions?

A
There can be a variety of reasons that you are not getting heat in your 325e. Here are some thoughts:

The engine coolant level may be low.
The engine thermostat may be stuck open. How long does it take the engine temp

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BMW E36 M52 Intermittent Heat & Running Hot

This answer is applicable for many BMWs in addition to the one listed below.

Q
car year: 1997
car model: 328i Convertible
There is something unusual going on in my cooling system. I am not sure what is wrong. Symptoms: – Heater/Defroster only gets hot intermittently even when the engine is up to normal temperature (engine does not take

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Heating Issue – 2000 323i E46

Q
I have a 2000 323i. The heat is not coming on, and if it does it’s very mild – not hot at all. The engine never reaches the half-way point on the temperature gauge either.

A
If the actual engine temp (according to the temp gauge) takes a long time to come up,

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BMW Heat & A/C Blower High Speed Only

This answer is applicable for many BMWs in addition to the one listed below.

Q
I read in “Fast Times” that you are willing to help. I have a 1994 325i series and the A/C Blower only works on high speed. It is as if the switch is broken. Can you tell me what part I may

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BMW Blower Speed High Only

Q I have a 1991 535i. The blower speed switch only works on High. It is annoying because if you want heat or A/C it has to be cranked all the way up on High. I was wondering what the problem could be.

A The problem of the blower motor only working on the high speed

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