Dynamax Grand Sport GT, model years 2026 to 2027. Filed by Forest River, Inc. and reported to NHTSA on 21 September 2026. 16 vehicles potentially affected.
What the notice says 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.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
CarsMultiverse/Recalls/Dynamax
Dynamax's own number for this recall: 40-2097. That is the number on the owner letter and on the dealer paperwork. 26V603 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 26V603 cover?
- Dynamax Grand Sport GT, model years 2026-2027.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Dynamax calls this recall 40-2097, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
affected
in the notice
caught
| Campaign | 26V603 |
|---|---|
| Filed by | Forest River, Inc. |
| System at fault | Fuel System, Diesel |
| Reported to NHTSA | 21 September 2026 |
| Model years | 2026-2027 |
| Vehicles named | DYNAMAX GRAND SPORT GT |
What the notice says today
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 consequence
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.
What it said before
Nothing has changed while we have been watching. We first read this campaign on 26 September 2026 and last read it on 26 September 2026.
The copy we hold today hashes to d347799564dcd9f6e5109162bfb839b8…, so if it is ever edited the change is provable rather than a matter of memory.
Last checked . No change has been recorded in the wording.
Official record: NHTSA campaign 26V603. Every Dynamax campaign we hold: Dynamax recalls.
Owners of these cars
No register publishes what happens after the letter. Owners do: tell us, in two taps.
Anonymous: no account, no cookie, nothing you type is stored beyond these choices. Figures appear once 3 owners have answered, and are published with the record under CC BY 4.0.