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antimony

Pungent egg smell from air vents

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I'm getting an eggy smell from the vents - most noticeable when just started, but just about detectable when waiting at a junction.  Still there whether AC is on or off.  Google suggests its a failing catalytic converter.  Is this correct with a diesel 520 (2011)?  Any idea how much this is likely to cost me?  Cheers

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I had the same last winter, I would say this is nothing more than moisture and bacteria building up in the HVAC system. What I did to remove this

 

# Change the cabin filters

# Run the car for a long journey with full heat changing the selection of where the air is coming from using the button (windows down if too hot)

# If still present then buy one of these: https://www.halfords.com/motoring/engine-oils-and-fluids/air-con/stp-auto-air-con-cleaner-150ml-149876.html (Mine didnt need this)

 

Edited by percha

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45 minutes ago, antimony said:

I'm getting an eggy smell from the vents - most noticeable when just started, but just about detectable when waiting at a junction.  Still there whether AC is on or off.  Google suggests its a failing catalytic converter.  Is this correct with a diesel 520 (2011)?  Any idea how much this is likely to cost me?  Cheers

 

It could be the aircon evaporator that needs chemically cleaned - This is where they remove the pollen filters and spray a disinfectant chemical on the evaporator getting rid of any bacterial build up. I had this done on my old F11 and it made a big difference. Mine was a musty smell rather than egg but I'd get that done first. You can buy a can of aircon cleaner from Halfords that you release into the rear footwell.

  

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I have this every year, starting beginning autum. I have to clean the evaporator every year. And change also the interiour filters. I remove cabin filters and spray the cleaner on the evaporator. Difficult to reach, i use some selfmade tool to gide the hose through the opening of the filter housing, finally to the top of the evaporator. The simple sprayer placed before the front seat does not work effective.

Edited by Goos

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Guys 

 

 

Did the above solutions do the trick? I have a F10 M5 that has a similar smell which I thought was the battery as the battery had started bulging, but since changing the battery the smell is still there although no longer in the boot area. The cabin smells prior to starting the car. Any ideas on what this could be please?

 

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Thanks will try that and see if it changes. The smell goes soon after starting the car. Its only there when you first get in.

 

 

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21 hours ago, AbidK said:

Thanks will try that and see if it changes. The smell goes soon after starting the car. Its only there when you first get in.

 

 

 

You need to get the matrix cleaned though as having the aircon on all the time helps but will not clean away the bacterial build up. Done properly, the specialist will remove the pollen filters and insert a wand into the air box spraying a chemical cleaner directly onto the matrix. I always run my cars with the aircon on but still needed to have this cleaning done and for the small price, well worth it. You don't want to be breathing in that bacteria.

Edited by Matthew Ashton

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