2023 Jeep Grand Wagoneer engine problems

What owners report

• “I was at a stoplight, waiting to making a U-turn. The light turned green release the brake and went to hit the gas. The entire vehicle shut off. I lost all power and had to restart the vehicle in the middle of the intersection with vehicles behind me. It took at least 30 seconds and I ended up…”

  filed May 24, 2026

• “An overheating engine causes the truck to shut down completely, block the power steering engine, and become undrivable. Electrical and harness assembly problems The dealership inspected the truck and attempted to repair it, but the same issues have recurred and are nearly causing an accident while…”

  filed Dec 15, 2025

Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.

Related service bulletins

• PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1) Key ON/OFF and let the after-run pump run for at least 20 minutes before moving on to step #2. 2) Inspect the…

  9100861 Rev 3 · Service Bulletin/Repair Instructions · issued Jul 28, 2026

• PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1) Key ON/OFF and let the after-run pump run for at least 20 minutes before moving on to step #2. 2) Inspect the…

  9100861 Rev 1 · Service Bulletin/Repair Instructions · issued Jul 16, 2026

• PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1) Key ON/OFF and let the after-run pump run for at least 20 minutes before moving on to step #2. 2) Inspect the…

  9100861 · Service Bulletin/Repair Instructions · issued Jul 9, 2026

Engine problems in other Grand Wagoneer years

Other reported problem areas on the 2023 Jeep Grand Wagoneer