# Service bulletin 09\-018\-25

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11020832
- Published by NHTSA: 2025\-07\-23
- Manufacturer's number: 09\-018\-25
- Manufacturer's date: 2025\-07\-16
- NHTSA component: ENGINE

## NHTSA's summary

Engine Cylinder Block Porosity Inspection \- Engine Cold Start Rough Idle Customers may experience the following: ● Rough engine idle when cold starting the engine. ● Low coolant level in coolant recovery bottle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11020832-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11020832-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2021 to 2024 JEEP COMPASS
- 2021 to 2024 JEEP GRAND CHEROKEE
- 2021 to 2024 JEEP GRAND CHEROKEE 4XE
- 2021 to 2024 JEEP GRAND CHEROKEE L
- 2021 to 2024 JEEP WRANGLER
- 2021 to 2024 JEEP WRANGLER 4XE

## Recalls for the same vehicles and component

- [2025617](/recalls/tc/2025617.md), 2025-11-06: Engine
- [25V766000](/recalls/nhtsa/25V766000.md), 2025-11-06: ENGINE
- [24V926000](/recalls/nhtsa/24V926000.md), 2024-12-12: STRUCTURE:FRAME AND MEMBERS; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
- [23V412000](/recalls/nhtsa/23V412000.md), 2023-06-08: ENGINE
- [22V865000](/recalls/nhtsa/22V865000.md), 2022-11-23: ENGINE
- [2022584](/recalls/tc/2022584.md), 2022-10-14: Engine
- [22V767000](/recalls/nhtsa/22V767000.md), 2022-10-13: ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
- [2022217](/recalls/tc/2022217.md), 2022-04-28: Engine
- [22V284000](/recalls/nhtsa/22V284000.md), 2022-04-28: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)

## Other bulletins for the same vehicles and component

- [18\-081\-26](/bulletins/11038538.md), 2026-10-16, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0607 \- Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction \(injection\) warning lamp illuminated in the Instrument Panel Cluster \(IPC\). This bulletin involves reprogramming the PCM with the latest available software.
- [18\-081\-26](/bulletins/11038501.md), 2026-10-16, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0607 \- Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction \(injection\) warning lamp illuminated in the Instrument Panel Cluster \(IPC\). This bulletin involves reprogramming the PCM with the latest available software.
- [S2609000011](/bulletins/11037354.md), 2026-09-17, Service bulletin: ENGINE. MIL\-On and/or Engine Oil Leak
- [09\-022\-26](/bulletins/11037275.md), 2026-09-10, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Right Engine Insulator Noise \*\*Customers may comment on the following:\*\* SYMPTOM: ● Metallic clicking noises when when moving the vehicle forward and reverse. \*\*This bulletin involves replacing the right engine insulator.\*\*
- [9100363 Rev 3](/bulletins/11036762.md), 2026-09-03, Service bulletin: ENGINE. Turbocharger Kit Please note that many turbo components are serviceable separately and full turbo replacement may not be required. If the turbo is being inspected for: Noise/Rattle: Inspect heat shield fasteners for looseness and check the wastegate actuator/linkage for binding. The actuator kit is serviced separately. Oil Leak: Inspect the turbo oil feed O\-ring area for leaks. O\-ring is serviced separately.
- [09\-018\-26](/bulletins/11036159.md), 2026-08-13, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Cylinder Head Screw Not Specific Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P1212 \- Engine Oil Temperature High \- RPM Limited. Customers may also experience the following: ● Engine overheating. This bulletin involves replacing the cylinder head to block bolts and head gasket.
- [07\-005\-26](/bulletins/11035310.md), 2026-07-29, Service bulletin: STRUCTURE:BODY; ENGINE. Not applicable to vehicles built for US market. M1 H1 Coolant Leak Customers may comment on one or more of the following: SYMPTOM: ● Possible overheat light on instrument cluster. ● Coolant leak from hose that contacts exhaust heat shield. This bulletin involves replacing an engine coolant hose.
- [113271](/bulletins/11035078.md), 2026-07-18, Service bulletin: ENGINE. CORE – HEATER
- [113270](/bulletins/11035077.md), 2026-07-18, Service bulletin: ENGINE. CORE – HEATER
- [S2609000010](/bulletins/11034921.md), 2026-07-08, Service bulletin: ENGINE. Mis\-Machined Engine Block

JSON: [/v1/bulletins/11020832](/v1/bulletins/11020832)

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