2021 Jeep Gladiator engine problems
53 owner complaints filed with NHTSA name the engine on the 2021 Jeep Gladiator — 19% of all complaints for this model year.
What owners report
“The contact owns a 2021 Jeep Gladiator. The contact stated that while driving approximately 35 MPH, the vehicle started losing motive power. The contact stated that there were several unknown warnings illuminated, and the instrument cluster had started flashing on and off. The contact stated that…”
filed Nov 4, 2025
“I am writing regarding my 2021 Jeep Gladiator Mojave, which recently suffered engine damage due to a faulty head gasket. I understand the vehicle is approximately 5,000 miles over the 60,000-mile warranty; however, I believe this issue should not be my financial responsibility given the…”
filed Oct 6, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- High pressure fuel pump (HPFP) may fail, causing an engine stallCampaign 22V767000 · Oct 13, 2022
Related service bulletins
CORE – HEATER
113271 · Service Bulletin/Repair Instructions · issued Jul 7, 2026CORE – HEATER
113270 · Service Bulletin/Repair Instructions · issued Jul 7, 2026BOLT - HEX FLANGE HEAD
112842 · Service Bulletin/Repair Instructions · issued Jun 18, 2026Check Engine Light (CEL) Illuminated with Diagnostic Trouble Code (DTC) P0106 Manifold Absolute Pressure Sensor Performance Setting In The Powertrain Control Module (PCM)
S2609000009 · Service Bulletin/Repair Instructions · issued Jun 15, 2026
Engine problems in other Gladiator years
| Year | Reports | Share |
|---|---|---|
| 2024 Gladiator | 3 | 14% |
| 2023 Gladiator | 7 | 13% |
| 2022 Gladiator | 20 | 17% |
| 2020 Gladiator | 45 | 9% |
Other reported problem areas on the 2021 Jeep Gladiator
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.