2017-2021 Tiffin Bus & Phaeton High Pressure Fuel Rail Assembly May Leak Fuel

April 30, 2021 NHTSA CAMPAIGN NUMBER: 21V306000

High Pressure Fuel Rail Assembly May Leak Fuel

A fuel leak in the presence of an ignition source increases the risk of a fire.

NHTSA Campaign Number: 21V306

Manufacturer Tiffin Motorhomes, Inc.

Components FUEL SYSTEM, DIESEL

Potential Number of Units Affected 3,198

Summary

Tiffin Motorhomes, Inc. (Tiffin) is recalling certain 2017-2021 Bus and Phaeton vehicles. The sealing washer may not seat correctly in the pilot bore, allowing the high pressure fuel rail assembly to leak.

Remedy

Tiffin will work with Cummins to inspect the rail threads , and replace the rail and fuel lines if damage is found, free of charge. Owner notification letters were mailed August 11, 2021. Owners may contact Tiffin customer service at 1-256-356-8661.

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.safercar.gov.

IMPORTANT SAFETY RECALL

This notice applies to your vehicle, identified by the VIN below

NHTSA Recall # 21V-306
TC Recall # 2021-265
Tiffin Recall # TIF-116

Interim Recall Notice

June 24, 2021

Cummins L9 engine, fuel rail assembly may leak

Dear Tiffin Motorhome Owner or Dealer,

For US Owners: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. For Canadian Owners: This notice is sent to you in accordance with the requirements of the Motor Vehicle Safety Act. This is to inform you that your vehicle may contain a defect that could affect the safety of a person.

Tiffin Motorhomes has decided that a defect, which relates to motor vehicle safety, exists on the following models of motorhomes: 2017, 2018, 2019, 2020 and 2021 Allegro Bus motorhomes built on PowerGlide chassis and 2017, 2018, 2019, 2020 and 2021 Phaeton motorhomes built on PowerGlide chassis that were built between March 1, 2017 and February 28, 2021.

Tiffin Motorhomes was notified by Cummins, Inc of a defect that exists on specific L9 engines manufactured between January 2, 2017 and October 16, 2020. The fuel rail assembly on these engines may develop leaks, which may result in an undetected prolonged diesel fuel spray. The owner/operator may see or smell diesel fuel and, in some cases, the check engine lamp may illuminate. A leak involving spraying/misting fuel in the presence of an ignition source may increase the risk of fire.

Cummins is currently developing the permanent remedy for this issue. You will receive a second notification to inform you when the final remedy is available and to provide instructions to schedule the recall for your engine.

In the meantime, Cummins advises you to periodically check the fuel rail for signs of leaking and seek repairs if leaks are identified. If a leak occurs, the operator may see or smell diesel fuel and, in some cases, the check engine lamp may illuminate.

If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800- CUMMINS (1-800-286-6467) or visit their website at care.cummins.com.

If you do not own the vehicle that corresponds to the identification number which appears on this Recall Notification, please return the notification to the Tiffin Warranty Department with any information you can furnish that will assist us in locating the present owner. You may also call us at 256356-8661 ext. 2176 or email [email protected].

If after contacting Cummins, you have further questions, please contact the Tiffin Recall Department, at 1-256-356-8661, 8:00 a.m. to 3:30 p.m., Central Time. For US Customers: You may also wish to notify the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington DC 20590, or phone 1-888-327-4236 (TTY: 1-800-424-9153): or go to https://www.safercar.gov . For Canadian Customers: If after contacting your dealer and/or manufacturer customer service you have additional questions with regards to this recall, you may contact Transport Canada-Road Safety, 80 rue Noël, Gatineau, Quebec J8Z 0A1, or call 1-800-333-0510.

Federal regulations require that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.

We regret any inconvenience this action may cause, but feel certain you understand our interest in motor vehicle safety.

Tiffin Recall Department

IMPORTANT SAFETY RECALL

This notice applies to your vehicle, identified by the VIN below

NHTSA Recall # 21V-306
TC Recall # 2021-265
Tiffin Recall # TIF-116

August 18, 2021

Cummins L9 engine, fuel rail assembly may leak

Dear Tiffin Motorhome Owner or Dealer,

Cummins will correct this condition by inspecting the rail threads for damage and, if damage is found, replace the rail and fuel lines. If no damage is found, new crush washers will be installed in the rail assembly using a special tool. This repair is currently available at Cummins Distributors and authorized Warranty Dealers. The repair will be completed free of charge and most applications will require approximately 2.5 hours to complete.

Please contact the nearest Cummins Distributor or authorized Warranty Dealer to arrange to have this campaign performed on your engine. The distributor or dealer will work with you to schedule the best date to complete this repair.

In the meantime, Cummins advises you to periodically check the fuel rails for signs of leaking and seek repairs if leaks are identified. If a leak occurs the operator may see or smell diesel fuel and, in some cases, the check engine lamp may illuminate.

Federal regulations require that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.

We regret any inconvenience this action may cause, but feel certain you understand our interest in motor vehicle safety.

Tiffin Recall Department