# Service bulletin SSM 50131

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: 10201596
- Published by NHTSA: 2021\-09\-28
- Manufacturer's number: SSM 50131
- Manufacturer's date: 2021\-09\-20
- NHTSA component: POWER TRAIN; ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

## NHTSA's summary

Some 2021 Bronco Sport vehicles may exhibit a hiss or rattle noise in the engine compartment while driving which may be originating from the manual park release cable. Disconnect the cable from the transmission and road\-test to confirm the noise is eliminated. If the noise is still present, refer to Workshop Manual \(WSM\), Section 100\-04 for diagnostic and repair information. If the cable is causing the noise, reconnect the cable and inform the customer that Ford is working on a solution which is expected to be available by mid\-December 2021. Advise the customer that the vehicle is safe to drive and schedule a follow\-up appointment for mid\-December. Once the solution becomes available, contact the customer and confirm the service appointment is going forward. Monitor OASIS for updates.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10201596-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10201596-9999.pdf)

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

## Components

Engine, Equipment and accessories, Labels and manuals, Transmission and driveline

## Vehicles listed

- 2021 FORD BRONCO SPORT

## Recalls for the same vehicles and component

- [25V685000](/recalls/nhtsa/25V685000.md), 2025-10-10: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER
- [2025376](/recalls/tc/2025376.md), 2025-07-14: Engine
- [2025134](/recalls/tc/2025134.md), 2025-03-14: Engine
- [25V158000](/recalls/nhtsa/25V158000.md), 2025-03-14: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM
- [24V267000](/recalls/nhtsa/24V267000.md), 2024-04-12: ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [2022152](/recalls/tc/2022152.md), 2022-03-29: Engine
- [22V191000](/recalls/nhtsa/22V191000.md), 2022-03-25: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION
- [2021011](/recalls/tc/2021011.md), 2021-01-18: Powertrain
- [21V011000](/recalls/nhtsa/21V011000.md), 2021-01-15: POWER TRAIN:DRIVELINE:DRIVESHAFT

## Other bulletins for the same vehicles and component

- [TSB 26\-2328](/bulletins/11035099.md), 2026-07-20, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER. This bulletin supersedes 26\-2194. Reason for update: update the Parts list to correct a part description " Loctite 638", update the claim quantity for the drain/fill plug, update the claim quantity of the wheel hub bolts \(Corsair\) and limited the parts list for Edge/Nautilus to only the rear drive unit fluid. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No relevant diagnostic trouble codes \(DTCs\) present This may be due to internal rear drive unit \(RDU\) fluid contamination.
- [SSM 54939](/bulletins/11034017.md), 2026-06-22, Service bulletin: POWER TRAIN. Some 2020\-2026 Corsair/Escape, 2021\-2026 Bronco Sport, and 2022\-2026 Maverick vehicles equipped with an 8F35 transmission may exhibit a shudder condition, most noticeable at speeds below 60 mph \(100 km/h\), with no relevant diagnostic trouble codes \(DTC\) stored in the powertrain control module \(PCM\). Sometimes, this may be perceived/felt as an engine misfire. This may be due to the torque converter. If Pinpoint Test K: Torque Converter Clutch Operation in Workshop Manual \(WSM\), Section 307\-01 \> Diagnosis and Testing \> Diagnosis by Symptom directs to replace the torque converter, remove and replace the torque converter and torque converter seal. Refer to WSM, Section 307\-01 \> Removal and Installation \> Torque Converter Seal. Remove the main control valve body. Refer to WSM, Section 307\-01 \> Removal and Installation \> Main Control Valve Body. Overhaul and thoroughly clean the main control valve body. Refer to WSM, Section 307\-01 \> Overhaul \> Main Control Valve Body. Reverse the removal procedure to reassemble the transmission. Install the transmission. Refer to WSM, Section 307\-01 \> Installation. For claim
- [25B51](/bulletins/11033577.md), 2026-06-05, Other: ENGINE. Certain 2021\-2024 Model Year Bronco, 2021\-2024 Model Year Bronco Sport, 2020\-2022 Model Year Corsair and Escape, 2016\-2024 Model Year Explorer, 2019\-2020 Model Year Fusion, 2016\-2018 Model Year Focus RS, 2022\-2024 Model Year Maverick, 2016\-2019 Model Year MKC and 2019\-2024 Model Year Ranger Vehicles Equipped with a 2.0L or 2.3L Engine and Engine Block Heater System Block Heater Replacement
- [SSM 54797](/bulletins/11032566.md), 2026-05-08, Service bulletin: POWER TRAIN. Some 2020\-2026 Corsair/Escape, 2021\-2026 Bronco Sport, and 2022\-2026 Maverick vehicles equipped with an 8F35 transmission may exhibit a shudder condition, most noticeable at speeds below 60 mph \(100 km/h\), with no relevant diagnostic trouble codes \(DTC\) stored in the powertrain control module \(PCM\). Sometimes, this may be perceived/felt as an engine misfire. This may be due to the torque converter. If Pinpoint Test K: Torque Converter Clutch Operation in Workshop Manual \(WSM\), Section 307\-01 \> Diagnosis and Testing \> Diagnosis by Symptom directs to replace the torque converter, remove and replace the torque converter and torque converter seal. Refer to WSM, Section 307\-01 \> Removal and Installation \> Torque Converter Seal. Remove the main control valve body. Refer to WSM, Section 307\-01 \> Removal and Installation \> Main Control Valve Body. Overhaul and thoroughly clean the main control valve body. Refer to WSM, Section 307\-01 \> Overhaul \> Main Control Valve Body. Reverse the removal procedure to reassemble the transmission. Install the transmission. Refer to WSM, Section 307\-01 \> Installation.
- [TSB 26\-2194](/bulletins/11031619.md), 2026-04-28, Service bulletin: POWER TRAIN. This bulletin supersedes 25\-2627. Reason for update: To add a Step to reprogram the all\-wheel drive \(AWD\) module for Bronco Sport vehicles. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No relevant diagnostic trouble codes \(DTCs\) present This may be due to internal rear drive unit \(RDU\) fluid contamination.
- [TSB 25\-2627](/bulletins/11028804.md), 2026-02-12, Service bulletin: POWER TRAIN. This article supersedes TSB 25\-2552 to update the Parts List Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No diagnostic trouble codes DTCs present This may be due to rear drive unit internal \(RDU\) fluid contamination.
- [25M02](/bulletins/11026929.md), 2026-01-05, Other: ENGINE; FUEL/PROPULSION SYSTEM; UNKNOWN OR OTHER. Customer Satisfaction Program 25M02 Certain 2021\-2024 Model Year Bronco Sport and 2020\-2022 Escape with 1.5L Engine and 8F35 Transmission Upstream Catalytic Converter Replacement, If Required
- [TSB 25\-2581](/bulletins/11026504.md), 2025-12-09, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. This article supersedes TSB 25\-2511 to update the Service Procedure and Parts List. Some of the vehicles listed in the Model statement above may exhibit a loss of engine coolant from a leak at the coolant pump. This may be due to contamination in the engine's cooling system.
- [SSM 54403](/bulletins/11025820.md), 2025-12-01, Service bulletin: POWER TRAIN. \* 2021\-2024 Bronco Sport built on or before 15\-Dec\-2024\<br /\> \* 2022\-2024 Mustang Mach\-E\<br /\> \* 2022\-2025 Escape built on or before 22\-May\-2025\<br /\> \* 2024 Maverick vehicles built on or after 17\-Jan\-2024\<br /\> \<br /\> Some of the above vehicles may exhibit an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P0929 stored in the gear shift module \(GSM\). This may be due to the software in the GSM. To correct the condition, reprogram the GSM module using the latest software level of the Ford Diagnosis and Repair System \(FDRS\). For claiming, use causal part 7P155 and labor operation numbers 7001D and 7001D4.
- [TSB 25\-2552](/bulletins/11025530.md), 2025-11-13, Service bulletin: POWER TRAIN. This article supersedes TSB 25\-2351 to update the Service Procedure Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No diagnostic trouble codes DTCs present This may be due to rear drive unit internal \(RDU\) fluid contamination.

JSON: [/v1/bulletins/10201596](/v1/bulletins/10201596)

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