2019 Subaru Ascent · Transmission & drivetrain
Powertrain defect may interrupt drive
A programming error in the Transmission Control Unit (TCU) may allow the clutch to engage before the drive chain is completely clamped.
What the reviewed source says
Start with the documented condition, not a parts guess.
NHTSA campaign 21V955000 includes certain 2019 to 2020 Subaru Ascent vehicles. Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2020 Legacy and Outback vehicles. An improperly secured drive chain may slip and break, causing a loss of drive power and increasing the risk of a crash.
Words owners may use
Does this match the moment?
Symptoms in the pattern
- The vehicle may hesitate, shift unexpectedly or lose drive, depending on the recalled part
- An open campaign appears when the complete VIN is checked
- Some recalled vehicles may show no advance warning before the component fails
Vehicles and scope
- 2019 to 2020 Subaru Ascent
- NHTSA campaign 21V955000
- The manufacturer filing lists 198,255 potentially affected units across the complete campaign.
- VIN eligibility determines whether this recall applies to an individual vehicle
Manufacturer position
What the official procedure directs
Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guide. If evidence of chain slippage or damage is found, the transmission will be replaced. Repairs will be performed free of charge.
Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.
Original evidence
Open the documents behind this page.
Repair paths and safe checks
Separate the diagnosis from the action.
Use the official recall remedy
Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guide. If evidence of chain slippage or damage is found, the transmission will be replaced. Repairs will be performed free of charge.
Do not buy parts from the campaign description alone. VIN scope, superseded remedies and parts availability can change.
What owners reported
Did this repair fix the same symptom on your car?
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Check the complete VIN before arranging work
Enter the 17-character VIN in NHTSA's recall lookup and ask the manufacturer or an authorised dealer to confirm whether the campaign is open for this vehicle.
A year, make and model match does not prove that every vehicle is included. The VIN result controls eligibility.
What owners reported
Did this repair fix the same symptom on your car?
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Useful before authorizing work
Read the method beside the problem
These guides explain the safety and evidence checks that apply to this problem file.
Check recalls by VIN
A VIN search checks the displayed NHTSA records for an unrepaired safety recall associated with one vehicle. A model search shows only the wider campaign population.
Read guide ↗When a car is unsafe
A warning light does not always mean the same thing, but weak brakes or smoke leave little room for experimentation. Damaged tires and certain recall instructions can do the same.
Read guide ↗Car shudders or vibrates
A useful diagnosis starts with when the vibration happens and where you feel it. The word shudder alone does not identify a transmission fault.
Read guide ↗More for this model
Other reviewed Subaru Ascent conditions
2019 Subaru Ascent · Electrical & electronic systems
Heater ground connection may melt behind the dashboard
NHTSA campaign 22V907000 lists the 2019 Subaru Ascent for a condition in which heater ground connection may melt behind the dashboard.
2019 Subaru Ascent · Engine & cooling
Engine defect may cause power loss or damage
The aluminum Positive Crankcase Ventilation (PCV) valve can separate, allowing the separated components to enter the engine, resulting in a loss of power while driving.
2019 to 2020 Subaru Ascent · Fuel system
Fuel pump or delivery fault may cause a stall
The low-pressure fuel pump inside the fuel tank may fail.