7. Seeing a few advertisements for 8line cooling coil clean decided to try the DiY route $15.90
Basically same thing as Tunap remove panels and cabin airfilters snake a tube into the HVAC box and pump it full of the disinfectant foam.
Result masked smell for 2 weeks or so but smell returned thereafter
https://shopee.sg/8line-Aircond-Coi...e-8-Line-Cool-(500-ML)-i.220028777.9291267281
8. Decided to try Ozone treatment and hunted in carousel for a service
Came across this guy and went down to meet him. Seems to help and run a car grooming service, his van was packed with all sorta of grooming stuff as per his ad.
Told him about my issue he suggested to try out some anti bacterial mist instead of the ozone treatment $55. Looks impressive but he didn't remove the airfilters, but the mist was seen pouring out of all the aircon vents so it must still be going through the system.
Result, waste of $55 right there should have stuck to my research instead of trying the anti bacterial mist out. Smell still there on startup and now the car smells like some powdery substance quite strongly.
https://www.carousell.sg/p/ozone-treatment-1114955710/
9. Getting desperate now, Yigo had a solution though, $450 to tear the dash open and manually wash out the cooling and heater coil and flush any crap found in there. They've done quite a lot of F10 and have the proper tools equipment and knowledge to do it well.
https://www.facebook.com/YIGOCARAIRCON/
https://www.carousell.sg/p/bmw-chan...er_request_id=ddz6UtgR5topJeDP&t-tap_index=13
However there are a few issues, the old adage comes to mind, if it ain't broke don't fix it.
Every time you remove something from an aging car you risk breaking something or cause another issue due to age or carelessness.
I firmly belive the cooling coil is stock orignal from bmw factory and so its a little over 8 years old now. Every BMW's cooling coil eventually will leak and require replacing at some point in its life, its just a fact of owning an old car. Therefore its a while your in there replace all the things that WILL eventually break which becomes fantastically expensive in very short while.
A quick call to Eng Soon yields costs for the following
Cooling Coil $200 (Mahle)
Expansion Valve $50 (ACM)
Aircon Drier Insert $130 (BMW)
Various O rings xxx
Add GST (BTW its illegal to quote prices in SG WITHOUT GST included if you are a registered GST entity)
https://www.iras.gov.sg/taxes/goods...-record-keeping/displaying-and-quoting-prices
Additionally replacing all this doesn't mean the problem is solved forever. Due to the constant usage of aircon, moisture builds up in the HVAC system and bacteria grows causing the smell once again and you're right back to square 1 even after spending upwards of $1000 ! Granted it will take sometime depending on usage and conditions etc but its an eventuality