2021 RAM ProMaster City Problems: 9 Known Issues
2021 model year · 3,600+ owner reports · Updated August 2026
According to Au7o's analysis of 3,600+ owner reports, the 2021 RAM ProMaster City has 9 documented known issues, with 6 rated critical. The most serious are ZF 9HP 9-Speed Automatic Transmission Problems ($0-$5,000 repair), Electrical System Faults and Stalling ($200-$1,200 repair), Seat Belt Automatic Locking Retractor Deactivates Early, Failing to Hold a Child Restraint (2021 Recall Y61) ($0-$0 repair), Anti-Lock Brake System Module Internal Damage Causing Loss of Braking Assist (2020-2021 Recall Y11) ($0-$1,800 repair), 2.4L Tigershark MultiAir II (ED6) Excessive Oil Consumption from Piston Ring Coking Leading to Engine Seizure ($4,500-$9,000 repair) and MultiAir II Hydraulic Valve Actuator ("Brick") Solenoid Failure Causing Misfire and Limp Mode ($1,300-$3,000 repair). The most commonly reported issue is ZF 9HP 9-Speed Automatic Transmission Problems with 1,950 owner reports. Across all issues with published estimates, repair costs range from $150 to $9,000. DIY maintenance guides at .