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My 2018 Murno, just started emmiting a sweet burt smell that takes your breath away, burns nose and throat. This started 3 weeks ago with the first encounter being very strong, now it is fainter and intermittent. Anyone else had thus problem?
 

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Sweet burned smell sounds like a fan motor overheating. Is the fan working OK at all speeds?

I can't see this having anything to do with the refrigerant charge. We need a better description of the situation.
 

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The Nissan engineers suggested a charcoal cabin filter. We will if that helps.
 

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You spoke to the Nissan engineers in Japan? Impressive! (Nudge, nudge...😉 )

Or did you get that from the service department at the dealer. Sadly, they are not engineers.
 

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Yes you are correct, the service department told me they spoke with a Nissan specialist, who was and engineer. This person suggested a charcoal filter. I can still smell the sweet chemical burning over. Going back again.
 

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Yes you are correct, the service department told me they spoke with a Nissan specialist, who was and engineer. This person suggested a charcoal filter. I can still smell the sweet chemical burning over. Going back again.
I would check your battery and alternator to be sure they're okay. If an alternator overcharges you battery it will emit a strong sulfur odor.
 

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A sweet smell would be antifreeze coolant, but I don't think that would take your breath away, and burn your nose and throat like you mentioned in your initial post. You may want to check your coolant reservoir to see if it's at the correct level.
 

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Yes you are correct, the service department told me they spoke with a Nissan specialist, who was and engineer. This person suggested a charcoal filter. I can still smell the sweet chemical burning over. Going back again.
Have you tried seeing if changing the air circulation to recycle( versus fresh intake air?) This may isolate whether the odor is from something in the cabin, or if it's something from outside the cabin.
 

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Recyled air does have a stronger smell than fresh air.
That would indicate it's most likely something inside the cabin.

It could be a relay that's starting to fail, but that would be more of an overheating electrical odor.
 
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MuranoSL2003
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