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2021 Thor Motor Coach Ace

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →
3Owner complaints

Model-year median: 3

1Recall campaigns

View recall details →

0Investigations

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How this year compares

Owner complaints by model year

Other model years Selected year
5
20182
20190
20203
20213
20221
2023
Compare all Ace years →

Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Electrical System
2Engine
1Power Train
1Suspension
1Vehicle Speed Control
1

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 0 of 3 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Electrical System. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports0 fire reports0 injury reports

Electrical System complaints

2 reports
Clear category filter
Mileage unknown · Jul 8, 2024
Electrical System

Air conditioner compressor wouldn't engage in rv. Called a mobile technician. Mobile technician found burnt and melted connectors on the control board. Technician stated the connectors used for 120v power were 12v crimp connectors and had burned and melted from the amperage. Technician stated that these used connectors were ill…

Read full complaint

Air conditioner compressor wouldn't engage in rv. Called a mobile technician. Mobile technician found burnt and melted connectors on the control board. Technician stated the connectors used for 120v power were 12v crimp connectors and had burned and melted from the amperage. Technician stated that these used connectors were illegal to use for 120v. This is a safety concern and could result in a fire. Stated we were lucky the control board melted and didn't result in a fire and burn down the coach.

NHTSA ODI #11600287

Mileage unknown · Oct 28, 2021
Electrical SystemEngineVehicle Speed Control

Returning home from trip, route US I26 in NC, heading down 6 degree hill lost all speed control. The following dash lights came on: ABS, Engine Service, the Wrench, anti sway control. We were able to roll to the side of the road just before an entrance ramp. There was no acceleration control.

NHTSA ODI #11438528

Official recalls

1

20V339000 · Visibility:glass, Side/rear

Jun 9, 2020

Thor Motor Coach (TMC) is recalling certain 2020-2021 ACE, 2021 Four Winds and 2020 Gemini, Axis, Compass, Delano, Windsport, Hurricane, Outlaw, and Vegas motorhomes. The adhesive bond between the glass and the metal hinge frame of the frameless windows may fail which would then allow the glass to detach and fall out.

Consequence & remedy

Consequence: If the window glass detaches while the vehicle is moving it could become a projectile, increasing the risk of a crash.

Remedy: TMC will notify owners, and dealers will inspect the frameless windows for proper adhesive bond strength, replacing the windows as necessary, free of charge. The recall began July 10, 2020. Owners may contact TMC customer service at 1-877-855-2867. TMC's number for this recall is RC000192.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.