Vehicle recall 21V468000 · June 23, 2021
2017-2020 Alexander Dennis Enviro 500
The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Alexander Dennis, Inc. (Alexander Dennis) is recalling certain 2017-2020 E500 buses. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
- Consequence
- A fuel leak in the presence of an ignition source increases the risk of a fire.
- Remedy
- Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owner notification letters were mailed June 18, 2021. Owners may contact Alexander Dennis customer service at 1-951-244-9429.
- 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.
Recall details
- NHTSA campaign
- 21V468000
- Reported to NHTSA
- June 23, 2021
- Filed by
- Alexander Dennis Inc.
- Owner notification
- June 18, 2021
- Vehicles potentially affected
- 310
- Initiated by
- the manufacturer
- Components
- Fuel system, diesel › Fuel injection system › Fuel rail
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Alexander Dennis Enviro 500 (2017-2020): 2020, 2019, 2018, 2017
Has your Alexander Dennis been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Alexander Dennis dealer can also check your VIN. Recall repairs are free.