AI Damage2021 Forest River Sierra: common problems
The maker issued 5 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 5
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 3 |
| Wheels | 0 | 0 | 2 |
| Equipment | 0 | 0 | 1 |
| Tires | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Wheels. Wheel runout, cracks, signs of a wheel strike.
- Tires. Tire age by DOT code, bulges, wear pattern.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Technical Document of how to diag
a fan speed in an Aircxel Air Conditioner.
- Progressive Dynamics model PD1610 Power Inverter with error code(s) "E-8" and/or "E-9"
This is due to an error in shipping the incorrect remote control for the power inverter. This document has been posted on Forest River's DealerConnect to direct the user to contact the appropriate Forest River…
- As per Lippert Components Technical Service Bulletin 11-004-21
The slide room actuator was assembled incorrectly, which may cause the room to become stuck in the out position and prevent from fully retracting.
- It was discovered that the manufacturing plant did not cut a stress relief line in the upper deck Driver…
It was discovered that the manufacturing plant did not cut a stress relief line in the upper deck Driver Side and in on certain models, Passenger Side under the slide room(s). The upper deck in the Impression…
- The Federal Placard indicates an incorrect tire size of ST235/85R16/F whereas the correct tire size and…
The Federal Placard indicates an incorrect tire size of ST235/85R16/F whereas the correct tire size and tire/rim combination installed on the vehicle is ST255/85R16/E.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Forest River Sierra?
There are no owner complaints in the NHTSA data for this year; the data comes from 5 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Forest River Sierra?
NHTSA lists 5 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Forest River Sierra from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.