2021 Jeep Wrangler GMET4 Engine Replacement TSB
This manufacturer communication outlines critical steps for replacing the GMET4 long block engine in 2021 Jeep Wrangler models, specifically regarding the injector wiring harness and fuel pressure sensor.
This manufacturer communication, identified by NHTSA ID 10247903, provides essential guidance for technicians performing engine replacements on the 2021 Jeep Wrangler. Specifically, it addresses the procedures necessary when installing a new GMET4 long block engine. This information is crucial for ensuring proper function and avoiding potential issues after an engine swap.
Issue Description
When a GMET4 long block engine from a 2021 Jeep Wrangler (or older models) requires replacement, there are two key components that need special attention. These steps are vital to maintain the vehicle's original specifications and operational integrity. This specific guidance helps address potential discrepancies that might arise during the engine replacement process for the 2021 Jeep Wrangler manufacturer_communication.
Repair Procedure Summary
For any GMET4 long block engine replacement in a 2021 Jeep Wrangler, technicians must adhere to the following instructions:
- Injector Wiring Harness: The injector wiring harness from the original engine must be carefully carried over and installed onto the new GMET4 long block. This ensures compatibility and correct electrical connections for the fuel injectors.
- Fuel Pressure Sensor: The existing fuel pressure sensor should be replaced with a new one. The specified part number for this replacement is 68212572AB.
Following these steps, as outlined in this manufacturer communication, is critical for a successful engine replacement.
Required Parts
During the GMET4 long block engine replacement for the 2021 Jeep Wrangler, the following specific part is required:
- Fuel Pressure Sensor: Part number 68212572AB
Owner Action
If your 2021 Jeep Wrangler requires a GMET4 long block engine replacement, it is important to ensure that your service center is aware of and follows this manufacturer communication (NHTSA ID 10247903). This ensures that the correct procedures are followed regarding the injector wiring harness and the fuel pressure sensor replacement. This guidance helps prevent potential issues related to the 2021 Jeep Wrangler manufacturer_communication, ensuring your vehicle operates as intended after the repair.
Source: NHTSA ID: 10247903
Frequently Asked Questions
- What is NHTSA manufacturer communication 10247903 about?
- NHTSA manufacturer communication 10247903 details specific procedures for replacing the GMET4 long block engine in a 2021 Jeep Wrangler, focusing on the injector wiring harness and fuel pressure sensor.
- Which part number is required for the fuel pressure sensor during a GMET4 engine replacement?
- During a GMET4 long block engine replacement in a 2021 Jeep Wrangler, the fuel pressure sensor must be replaced with part number 68212572AB.
- Do I need to replace the injector wiring harness when replacing the engine?
- No, the manufacturer communication specifies that the injector wiring harness from the original engine should be carried over and reused with the new GMET4 long block.
- Does this communication apply to all Jeep Wrangler models?
- This particular manufacturer communication specifically applies to the 2021 Jeep Wrangler, particularly when replacing a GMET4 long block engine.
What Jeep Wrangler owners report
Counted from the records in our database across 41 model years.
- 18,838
- Owner complaints
- 104
- Recalls
- 2,758
- Service bulletins
- 572
- Crashes reported
- 552
- Fires reported
- 435
- Injuries reported
The 2021 model year
963 complaints, the 5th most of 41 model years on file. Owners reported 21 crashes, 27 fires and 15 injuries for this year, which also has 17 recalls on file.
Back Over Prevention and Service Brakes and Fuel System and Gasoline, the system this article covers, accounts for 3,212 of 18,838 complaints (17%), including 55 for 2021.
Complaints by model year
| 2006 | 730 | |
|---|---|---|
| 2007 | 1,750 | |
| 2008 | 1,904 | |
| 2010 | 686 | |
| 2012 | 836 | |
| 2014 | 658 | |
| 2018 | 1,827 | |
| 2019 | 747 | |
| 2021 | 963 | |
| 2024 | 970 |
Most-reported systems
- Steering — 3,929
- Electrical System — 3,613
- Power Train — 2,470
- Engine — 2,406
- Fuel System — 2,015
Latest recalls for the 2021 model year
- 26V363000 — Steering (Jun 2026) — Park outside
- 25V741000 — Electrical System (Oct 2025) — Park outside
- 24V720000 — Electrical System (Sep 2024)
Recent owner reports about back over prevention and service brakes and fuel system and gasoline
Manufacturer corporate and its dealer network are failing to provide a safe, timely remedy for a vehicle subject to high-voltage battery fire recalls (Recall 68C / NHTSA Campaign 25V-741) and a power steering fire recall (Recall 21D / NHTSA Campaign 21V-363).
Read owner complaints →The contact owns a 2021 Jeep Wrangler. The contact stated that while driving 40 MPH, the vehicle lost motive power. The contact was able to turn onto a side street and pull over to the side of the road.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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