The defect
Forest River, Inc (Forest River) is recalling certain 2026-2027 Dynamax Grand Sport GT recreational vehicles. The engine pre-heat pump may have been improperly installed, causing the coolant hose to fail.
The risk
A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.
The remedy
Dealers will re-pin the wiring harness, re-route the coolant hoses, and replace parts as necessary, free of charge. Owner notification letters are expected to be mailed October 31, 2026. Owners may contact Forest River customer service at 1-574-522-1583. Forest River's number for this recall is 40-2097.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Dynamax Grand Sport GT | 2026, 2027 |
Components: FUEL SYSTEM, DIESEL: PRE-HEATER
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Dynamax Grand Sport GT | 2026 | 0 | 1 |
| Dynamax Grand Sport GT | 2027 | 0 | 2 |
Other fuel system, diesel recalls in 2026
12 of the 666 recall campaigns reported to NHTSA in 2026 concerned the fuel system, diesel; Forest River, Inc. filed 592 campaigns in all.
| 26V679000 15 Oct 2026 | Shyft Group |
| 26V669000 12 Oct 2026 | Temsa |
| 26V661000 8 Oct 2026 | Sutphen Corporation |
| 26V662000 8 Oct 2026 | Tiffin Motorhomes, Inc. |
| 26V660000 7 Oct 2026 | Daimler Trucks North America, LLC |
| 26V522000 10 Aug 2026 | Daimler Trucks North America, LLC |
| 26V523000 10 Aug 2026 | Daimler Trucks North America, LLC |
| 26V497000 30 Jul 2026 | Wanco, Inc. |
NHTSA recalls (public domain) · all recalls of 2026