NHTSA campaign 21V987000 · Honda campaign KN1
Honda Recall 21V-987: Radiator Cap May Leak or Spray Hot Coolant
NHTSA recall 21V987000 (Honda campaign KN1) was reported by Honda (American Honda Motor Co.) on December 16, 2021, with 1,022 vehicles potentially affected (per NHTSA). NHTSA's record lists the Honda Rebel 1100 for the 2021 model year. Owners were notified on February 22, 2022, 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 21V987000 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.
Honda VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V987000 (also written 21V-987 or 21V987)
- Filed by
- Honda (American Honda Motor Co.)
- Honda campaign number
- KN1
- Report received
- Potentially affected
- 1,022 vehicles (per NHTSA)
- Component
- Engine and Engine Cooling — Cooling System — Radiator Assembly
- Owners notified
Repair completion: 63.21% (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 21V987000. 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.
Honda
Honda Rebel 1100
NHTSA's recall notice
As NHTSA's recall record states it for campaign 21V987000.
Defect description
Honda (American Honda Motor Co.) is recalling certain 2021 Honda Rebel 1100 (CMX1100) motorcycles. The radiator cap may have been improperly formed during manufacturing, which could create an insufficient seal.
Safety consequence
An insufficiently sealed radiator cap may leak or spray hot coolant, increasing the risk of injury or crash.
Manufacturer remedy
Dealers will replace the radiator cap and refill any lost coolant, free of charge. Owner notification letters were mailed February 22, 2022. Owners may contact Honda service at 1-888-234-2138. Honda's number for this recall is KN1.
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 21V987000
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.