Pre-purchase inspection checklist — 2021 Proterra Catalyst
The 2021 Proterra Catalyst presents noticeable issues, particularly with its electrical system and parking brake, both subject to recalls. Prospective buyers should be alert to these concerns, particularly during inspections and test drives.
NHTSA data on file today
The 2021 Proterra Catalyst has 5 NHTSA recall campaigns and 1 owner complaint on file as of . Recall data is refreshed daily from NHTSA.
Recall campaigns on file
- NHTSA #24V655000 Radiator Fan Electrical Circuit May Overheat NHTSA notice
- NHTSA #23V697000 Inverter May Fail Causing Loss of Power NHTSA notice
- NHTSA #23V078000 Windshield Wiper Motor May Fail NHTSA notice
- NHTSA #22V855000 Parking Brake Can Unintentionally Engage NHTSA notice
- NHTSA #22V114000 Steering Gearbox May Loosen NHTSA notice
Most-cited components in owner complaints
- Electrical System 1 complaint
Known issues to inspect
Radiator fan circuit overheating
How to check: Inspect the electrical system and software version; overheating signs.
Inverter overheating and failure
How to check: Check for software updates and inspect the inverter.
Wiper motor failure
How to check: Test wipers for consistent operation.
Parking brake engages unintentionally
How to check: Test the parking brake; listen for unexpected engagement.
Steering gearbox bolts loosen
How to check: Check for loose bolts or unusual noises during steering.
Test-drive walkthrough
- 01
Cold start
What to check: Check dashboard for electrical warning lights.
Red flag: Persistent warning lights
- 02
First minute idling
What to check: Listen for unusual radiator fan noises.
Red flag: Loud or inconsistent noise
- 03
Low-speed turns
What to check: Test steering responsiveness and noise.
Red flag: Steering wheel noise or play
- 04
Highway acceleration
What to check: Ensure consistent power steering with no noise.
Red flag: Loss of power steering
- 05
Windshield wiper use
What to check: Test if wipers operate smoothly and continuously.
Red flag: Wipers fail to operate
- 06
Parking brake check
What to check: Engage and disengage brake for smooth operation.
Red flag: Brake engages while driving
Questions for the seller
Use this exact phrasing.
- Has the inverter issue been addressed?
- Are there any outstanding recalls?
- Has the radiator fan software been checked?
- Have wiper motors been replaced?
- Is the parking brake operating correctly?
Documents to request
Don't sign anything until you have these.
- Recall repair records
- Service history
- Warranty documentation
- Software update logs
- Safety inspection report
Generated by gpt-4o on from the NHTSA recall campaigns and owner-complaint counts on file for the 2021 Proterra Catalyst at the time. AI output can be wrong; confirm anything you find with a mechanic.
Next step
Looking at a specific 2021 Proterra Catalyst? Check the actual car
This checklist covers the model. From your free try.vin dashboard you can go further — paste the seller's listing for a deal score, or drop their photos for an AI condition report.