Campaign 26V-603

Engine pre-heat pump may have been improperly installed, causing the coolant hose to fail

Defect summary

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.

Consequence

A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.

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.

Source: NHTSA ODI recalls file, campaign 26V603000. Text as published by NHTSA.

Vehicles covered

One product line is covered

Owner complaints filed with NHTSA about fuel system on these vehicles: 0, of which 0 involved a crash, fire, injury or death. Complaints are not verified by NHTSA.

Vehicles covered by campaign 26V-603
Make	Model	Model years	Complaints on this component
Dynamax	Grand Sport GT	2026 to 2027	0

Source: NHTSA ODI recalls and complaints files. Equipment, tire and child-seat campaigns list products, not vehicles.

Investigation

No NHTSA investigation is linked to this recall

Most recalls are started by the manufacturer. This one lists "Manufacturer" as its origin.

Before the recall

No service bulletins on this component preceded the recall

Distinct manufacturer communications on the same component group, make, model and model year in the 24 months before the report date.

Source: NHTSA manufacturer communications file.

Service bulletins

25V-486 Jul 25, 2025
Fuel line extension connectors may have inconsistent crimps, allowing the fuel line to detach
23V-286 Apr 21, 2023
Fuel hose between the inline fuel filter and the Injection Pump Module (IPM) may have inadequate clamp force, possibly resulting in a gasoline leak
21V-623 Aug 10, 2021
Electric fuel heater within the fuel module may overheat, causing plastic in the fuel heater to melt and potentially catch fire
19V-395 May 24, 2019
Electric fuel heater within the fuel module may overheat and cause plastic in the fuel heater to melt and potentially catch fire
17V-780 Dec 6, 2017
Screws used to secure the floor in these buses may be too long and can damage the fuel lines underneath
15V-525 Aug 18, 2015
Affected vehicles are equipped with Navistar engines that have fuel injectors that may fail