Honda Rebel 1100 radiator cap may spray hot coolant

NHTSA campaign 21V987000 · Reported 2021-12-16 · Honda (American Honda Motor Co.)

medium How serious is it? About this label

Hot coolant leaking or spraying can burn you or lead to a crash, so ride only until you can get the cap replaced; Honda has not told riders to stop riding.

What's wrong, in plain English

The radiator cap on some 2021 Honda Rebel 1100 motorcycles was not shaped correctly when it was made, so it may not seal the cooling system tightly. The engine's coolant is under pressure when hot, and a bad seal can let that hot liquid leak out or spray. Honda dealers will put on a new radiator cap and top up any coolant that was lost, at no cost to you.

What you should do

1. Enter your VIN at nhtsa.gov/recalls to confirm your motorcycle is included.
2. Call a Honda dealer, or Honda service at 1-888-234-2138, and mention recall KN1.
3. Have the dealer replace the radiator cap and refill the coolant — the repair is free.

Affected vehicles (1)

2021 Honda Rebel 1100

Who to contact

Honda — official Honda recall lookup

Customer service: 1-888-234-2138

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Honda engine recalls keep centering on rod bearings and oil leaks · all 11 Honda recalls in this area

Official notice

Component: ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
Summary: 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 risk: An insufficiently sealed radiator cap may leak or spray hot coolant, increasing the risk of injury or crash.
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.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.