very heavy ammonia smell during regen in car

At 40k, 2015 passat sel, very heavy ammonia odor both in car and at exhaust.Never noticed this during any previous regen. Its so heavy you can smell it 15 feet away.

Check the ad blue injector/connector under the hood by the passengers firewall, she may be crystallizing, that'd explain the cabin smell as I think fresh air inlet is not to far away from it.

Also any recent work done on the car?

The injector had been leaking and it was changed 10k ago. Once the regen finished, its back to normal, no odor out exhaust. I had never had this very heavy ammonia odor from any of the three tdi's during regen, or perhaps it occurs unnoticed while driving at speed, not idle.

I've noticed the smell i wouldn't say crazy strong (I am responsible for changing the cat litter box) but never inside the cabin.

I'd say pop the hood again and peak see, dealer repairs are never 100% perfect.