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NHTSA·Cars and vehicles·September 21, 2026

Forest River recalls 2026–2027 Dynamax Grand Sport GT RVs over engine pre-heat pump installation flaw

The engine pre-heat pump may have been installed incorrectly, which can make a coolant hose fail and the engine overheat, raising the risk of a crash.

What to do

Dealers will re-pin the wiring harness, re-route the coolant hoses and replace parts as needed, free of charge. Owners may call Forest River customer service at 1-574-522-1583 and cite recall number 40-2097.

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NHTSA recall page

Recall details

Product
Dynamax Grand Sport Gt 2026–2027
Company
Forest River, Inc.
Hazard
A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.
Units
16 vehicles
Owner notification
October 20, 2026
Reported to NHTSA
September 21, 2026
Identifiers
  • NHTSA campaign number: 26V603000
  • Manufacturer campaign number: 40-2097
  • Model years: 2026–2027

The headline, summary and steps above are written in plain English from the official notice below. Identifiers are copied exactly as the agency published them. Always check the official notice before you act.

Official notice

The notice's own wording from NHTSA.

Component
FUEL SYSTEM, DIESEL: PRE-HEATER
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.
Consequence
A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.
Corrective action
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.

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