NHTSA campaign 21V532000 · New Flyer campaign R21-013
New Flyer Recall 21V-532: Excessive Ammonia in Tailpipe Exhaust
NHTSA recall 21V532000 (New Flyer campaign R21-013) was reported by New Flyer of America, Inc. on July 14, 2021, with 28 vehicles potentially affected (per NHTSA). NHTSA's record lists the New Flyer XD35 and New Flyer XD40 for the 2021 model year. Owners were notified on July 23, 2021, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V532000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V532000 (also written 21V-532 or 21V532)
- Filed by
- New Flyer of America, Inc.
- New Flyer campaign number
- R21-013
- Report received
- Potentially affected
- 28 vehicles (per NHTSA)
- Component
- Engine and Engine Cooling — Exhaust System — Manifold/Header/Muffler/Tail Pipe
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 21V532000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
New Flyer
All New Flyer recallsNHTSA's recall notice
As NHTSA's recall record states it for campaign 21V532000.
Defect description
New Flyer of America, Inc. (New Flyer) is recalling certain 2021 XD35 and XD40 vehicles equipped with 2021 Model Year Cummins L9 Diesel Engines. The engine calibration software's management of the injection of Diesel Exhaust Fluid can allow excessive ammonia to be emitted from tailpipe exhaust.
Safety consequence
Exposure to high levels of ammonia can increase the risk of injury.
Manufacturer remedy
Cummins will recalibrate the engine, free of charge. Owner notification letters were mailed on July 23, 2021. Owners may contact New Flyer's customer service at 1-800-204-224-6706. New Flyer's number for this recall is R21-013.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Sources
Official NHTSA notice for recall 21V532000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.