Home / Latest recalls / 26V603

Dynamax Grand Sport GT Recall 26V603: Coolant Hose Can Fail, Risking Engine Overheating

NHTSA campaign 26V603, reported September 21, 2026, 16 vehicles potentially affected.

What this recall means for you

Some diesel recreational vehicles have an engine pre-heat pump that may have been improperly installed. Over time, this can cause a coolant hose to fail.

If a coolant hose fails, the engine can overheat, which increases the risk of a crash. Owners should take this recall seriously and have their vehicle checked promptly.

Authorized dealers will re-pin the wiring harness, re-route the coolant hoses, and replace parts as necessary, all free of charge. Owners who have questions can contact Forest River customer service at 1-574-522-1583 and reference recall number 40-2097. You can also check your VIN for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 26V603Forest River, Inc.
Component
FUEL SYSTEM, DIESEL: PRE-HEATER
Problem
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.
Risk
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 were mailed October 20, 2026. Owners may contact Forest River customer service at 1-574-522-1583. Forest River's number for this recall is 40-2097.

Affected vehicles

Dynamax Grand Sport GT20262027