2021 Forest River Sierra problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just 4 complaints on file for the 2021 Forest River Sierra — too few to judge reliability from owner reports alone — but one recall campaign applies to this year, so any used example should have its VIN checked for completed recall work.

NHTSA complaints

Recalls

Investigations

Crash-involved

Fires reported

Injuries

Deaths

—

NCAP overall

How does 2021 compare to other Sierra years?

Sierra NHTSA complaints by model year, 2021 highlighted. Red bars are years to avoid.

See all Sierra years to avoid →

What are the most common 2021 Forest River Sierra problems?

Component	Complaints	Share	vs prior year
Other	2	50%	▲ up
Brakes	1	25%	new
Electrical System	1	25%	— flat

Does the 2021 Forest River Sierra have recalls?

1 NHTSA recall campaign on file. Recall repairs are free at franchised dealers.

21V378000OtherMay 24, 2021 · 18 units

Defect

Forest River, Inc. (Forest River) is recalling certain 2021 Sierra and Sandpiper Fifth Wheel and Travel Trailers. The bolts that hold the floor to the chassis were improperly tightened.

Consequence

Improperly tightened bolts could cause the trailer body to detach from the chassis, increasing the risk of a crash.

Remedy

Dealers will tighten the bolts to the chassis outriggers, free of charge. Owner notification letters were mailed June 9, 2021. Owners may contact Forest River customer service at 1-574-534-4574. Forest River's number for this recall is 03-1347.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“The contact owns a 2021 Forest River Sierra Model 379FLOK travel trailer. The contact stated that while the travel trailer oven was in use, the heat vent on the back of the oven melted the backsplash. The travel trailer was not diagnosed nor repaired. The dealer and manufacturer were not made aware…”
Complaint filed with NHTSA · Other · September 28, 2021 · fire

“The contact owns a 2021 Forest River Sierra fifth wheel trailer. The contact stated while driving approximately 55 mph, the trailer brakes failed to engage while the brake pedal was depressed. The contact stated that the "trailer wiring fault" message was displayed. The vehicle was diagnosed and…”
Complaint filed with NHTSA · Brakes · July 1, 2021

“The contact owns a 2021 Forest River Sierra fifth wheel trailer. The contact stated while driving approximately 55 mph, the trailer brakes failed to engage while the brake pedal was depressed. The contact stated that the "trailer wiring fault" message was displayed. The vehicle was diagnosed and…”
Complaint filed with NHTSA · Electrical System · July 1, 2021

2021 Forest River Sierra — common questions

Is the 2021 Forest River Sierra reliable?

The record is thin — 4 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 1 recall should be verified as completed.

Does the 2021 Forest River Sierra have recalls?

Yes — NHTSA lists 1 recall campaign affecting the 2021 Forest River Sierra. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.

How does 2021 compare to other Sierra years?

What are the most common 2021 Forest River Sierra problems?

Does the 2021 Forest River Sierra have recalls?

Consumer complaints filed with NHTSA

2021 Forest River Sierra — common questions

Is the 2021 Forest River Sierra reliable?

Does the 2021 Forest River Sierra have recalls?

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