Q
I think I should replace the oxygen sensors. I would like to know where they are located, and how many are there are on my 02′ 745 LI.
A
The oxygen sensors on your 2002 745Li have a recommended replacement interval of 100,000 miles. There are four oxygen sensors, in total. There is one
Continue reading 2002 BMW 745li Oxygen Sensors – E65 E66 E60 E61 E65 E66
This answer is applicable for many BMWs in addition to the one listed below.
Q
1995 325is
250,000 miles
Just failed my emmissions test in CT. The test that failed is the HC. My results were 211 ppm versus a test limit of 120 ppm. Can you suggest the likely cause of the failure? A sensor, tune up, any
Continue reading BMW Emissions Test Failure & Pinging / Knock (Detonation) – E36 & Others
This answer is applicable for many BMWs in addition to the one listed below.
Q
car year: 2001
car model: 740i
I am getting a service engine light and after using an obdII scanner I am getting codes p0171 system too lean bank 1 and p0174 system too lean bank 2. I have cleaned the mass air flow sensor
Continue reading BMW V8 Fault Codes P0171 & P0174 – M60 & M62 – PCV – Crankcase Ventilation Valve
This answer is applicable for many BMWs in addition to the one listed below.
Q
My wife and I have had a 1995 325i convertible for the past ten or so years (80k miles now). From time to time during the early period of our ownership, when the ambient temperature and humidity were just right in the
Continue reading BMW Exhaust Smell (Sulfur / Rotten Eggs)
This answer is applicable for many BMWs in addition to the one listed below.
Q
car year: 1997
car model: Z3 1.9
I would like to know the details about the trouble codes that were displayed when I took my car to the smog inspection to have it tested recently. The mechanic there looked them up and wrote down
Continue reading BMW Z3 M44 Fault Code – P0420 & P0500 – Catalyst Efficiency
Q
I noticed in an old newsletter you had a reader ask about gas smell and the response was that the canister may be saturated, sounds likely. I have a 1988 528e. Where would this canister be located? The newsletter gave three different locations.
And for my 1991 325i, how difficult is it
Continue reading Charcoal Canister – 1988 BMW 528e E28 & OBC – 1991 325i E30
Q
I own a 1997 BMW 740iL, which currently has 123,000 miles. Currently it is idling rough when the engine is cold and goes away once the car heats up to normal operating temperatures. The colder it gets meaning 5-20 degrees the worst it runs. I have used an OBDII fault code meter and have
Continue reading Fault Codes, Camshaft Sensor – 1997 BMW 740iL V8 E38
This answer is applicable for many BMWs in addition to the one listed below.
Q
I am using the excellent article in the 2008 newsletter (Diagnosing Secondary Air Systems – DIY) to troubleshoot my P0492 code (and check engine light) on my 2002 X5 3.0 (M54 engine).
Last May I had this light come on and the dealer
Continue reading BMW P0492 Secondary Air Flow Too Low M54 M56 6-cylinder & M62 V8
Q
Can you tell me what these codes mean; 16, E9, EA
I bought a Bavarian Autosport scan tool and I can pull the codes with no problem, but my problem is figuring out where in the booklet I go to understand what the codes mean. I have a 1997 M3. What do you suggest?
A
When
Continue reading Fault Codes, Catalytic Efficiency – 1997 M52 E36
This answer is applicable for many BMWs in addition to the one listed below.
Q
car year: 1998
car model: 740iL
I just purchased this car. After driving it for few weeks I noticed a rattling noise coming out of the converters(cats) area. Only when you start it till it warms up and then it goes away. Do I
Continue reading BMW Catalytic Converters Rattling – 540i, 740i, 840i, X5
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