Recall 20V277 affects 3,116 2015-2018 Yamaha XC155F and XC155 scooters for loose cylinder head nuts. Repair is free at any franchised Yamaha dealer.
Yamaha is recalling 3,116 2015-2018 XC155F and XC155 scooters because cylinder head nuts can loosen if they were not tightened properly, allowing coolant to foul the spark plug. A fouled spark plug can stall the engine at idle and keep it from restarting, which increases crash risk; Yamaha dealers will complete the recall repair free of charge.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The cylinder head on 2015-2018 Yamaha XC155F and XC155 scooters seals the top of the engine's combustion chamber. The cylinder head nuts clamp that head and gasket tightly against the engine block, so coolant stays in its cooling passages and the spark plug can ignite the fuel-air mixture cleanly.
On affected scooters, those nuts were not tightened correctly during assembly. As the engine runs and heats up, loose head nuts let the cylinder head gasket lose its seal. Coolant then enters the combustion chamber and wets the spark plug. A wet spark plug cannot fire reliably, so the scooter can fail to start or stall while idling.
Owners can see or feel warning signs before the failure. The coolant temperature warning light can illuminate, the engine idle can become unstable, and the engine can misfire at idle.
Who's affected?
Spans two XC155 variants across the 2015-2018 model years, all tied to the engine.
| 2015 Yamaha XC155F | Engine |
|---|---|
| 2016 Yamaha XC155 | Engine |
| 2017 Yamaha XC155 | Engine |
| 2018 Yamaha XC155 | Engine |
| 2015 Yamaha XC155 | Engine |
| Units affected | 3,116 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific scooter is included.
What's the safety risk?
A fouled spark plug can make the engine stall at idle and fail to restart, which increases the risk of a crash. Watch for a coolant temperature warning light, unstable idle, or misfire at idle. If that happens, pull over safely and arrange service soon. Repair is free at any franchised Yamaha dealer.
What should I do?
- Check your VIN to confirm your 2015-2018 Yamaha XC155F or XC155 scooter is included in this recall.
- Contact a franchised Yamaha dealer to schedule the free cylinder-head-gasket replacement and cylinder-head-nut tightening that addresses coolant fouling of the spark plug and engine stalling at idle.
- Bring the recall notice if Yamaha mailed one. If not, reference recall number 20V277 when you call.
- Call Yamaha customer service at 1-800-962-7926 with questions, and mention Yamaha recall 990137.
- Avoid extended idling until the repair is complete, and be ready to pull over safely if the engine stalls.
What happens at the repair
At the dealer, a Yamaha technician replaces the cylinder head gasket and tightens the cylinder head nuts to the proper specification. That repair addresses loose cylinder head nuts that let coolant reach the spark plug. The recall repair is available now, and parts and labor are free at a Yamaha dealer. Ask the service desk to confirm the recall campaign on your VIN before the work starts so the repair is handled under the open recall.
Timeline
| May 15, 2020 | NHTSA published the recall |
|---|---|
| May 29, 2020 | Owner notification mailed |
| May 29, 2020 | Dealer notification began |
| May 29, 2020 | Interim owner notification (was planned for this date) |
| June 2, 2020 | Dealer notification ended |
Frequently asked questions
What is recall 20V277?
Recall 20V277 covers 3,116 2015-2018 Yamaha XC155F and XC155 scooters with cylinder head nuts that were not tightened properly. If the nuts loosen, coolant can foul the spark plug. Yamaha dealers will replace the cylinder head gasket and tighten the nuts for free.
What should I do if my 2015-2018 Yamaha XC155F or XC155 is on this recall?
Check your VIN to confirm your specific scooter is included in recall 20V277. If it is, contact a franchised Yamaha dealer to schedule the cylinder head gasket replacement and cylinder head nut tightening. Reference recall number 20V277 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Yamaha will replace the cylinder head gasket and tighten the cylinder head nuts free of charge at any franchised Yamaha dealer.
What is the safety risk?
A fouled spark plug can make the engine stall at idle and stop the scooter from restarting. That loss of engine power increases crash risk, especially in traffic. If your scooter stalls or fails to restart, call a Yamaha dealer before riding it again.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V277000 |
|---|---|
| Yamaha customer service | 1-800-962-7926 |
| NHTSA recall # | 20V277 |
| NHTSA recall # (full) | 20V277000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Misc. Document (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →