Just got a 2007 BMW 525XI, the previeuse owner was a smoker. whenever I turn the air circulation on, I get this strong tobacco smell coming through the vent. could it be the Air filter dirty? if yes, how can I replace it(DIY) I have been creaning the car with leather cleaning, wet wipe and it did help a bit for the last week but still have the Cigarette Odor. Thanks
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You'll get new engine air filter and mircofilter (a/c) whenever your
computer tells you that they're bad. Otherwise, if you want to do it for
you own driving enjoyment, just do it when the a/c smells bad, or do
the engine filter when ever you look at the existing one and feel
Them, when you make this job in the dealer os BMW shop, they could reset and reprogrammed this time at next change/replacement.
Yes it makes a difference. You can never go wrong following the manufactures recommendations in your owner's manual. Saying that, I recommend every 5,000 miles if you use conventional oil and every 7,000 miles if you use synthetic and drive normally. If you drive mainly highway driving you can extend these 1,000 miles. Just as important is to change the filter at every oil change and to use a quality filter such as Purolator, Wix, AC/Delco, Motorcraft, or Bosch. Avoid cheap filters. Also important to a clean engine is to change the air filter every 30,000 miles.
If you run your Air cond on recirculate always try using an air sanitizer in your return vent. Or switch your A/C to outside air flow for for half an hour and raise the rear of your sunroof panel to vent the stale air do this till the smell dissipates and then close he sunroof and reset the A/C to recirculate if desired.
AS SILLY AS IT SOUNDS ITS YOUR MAX AIR FLOW METER,OR COULD EVEN BE A REALLY DIRTY AIR FILTER, SERIUOSLY BMW HAD MY CAR IN COULDNT FIX IT, MISSED THE FACT THE AIR FILTER WAS FILTHY AND NOT LETTING ENOUGH AIR THROUGH, ICHANGED IT AND IT STARTED FIRST TURN
It also helps to spray some Fridgi-Fresh or Fridgi-Freeze stuff on the cabin air filter and into the A/C condensor. It kills the odor causing bacteria. A local auto parts store should stock it. Might run you about $20 for a bottle of it.