# Service bulletin SSM 52178

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: 10248998
- Published by NHTSA: 2024\-01\-18
- Manufacturer's number: SSM 52178
- Manufacturer's date: 2024\-01\-15
- NHTSA component: ENGINE; UNKNOWN OR OTHER; STRUCTURE: UNDERRIDE

## NHTSA's summary

Some 2021\-2024 Bronco vehicles may exhibit a rattle from the front windows with the windows placed in the partially down position and driving over rough roads and/or bumps. This condition is currently under investigation and repairs and/or component replacement is not expected to reduce the rattle. Inform customers that they can continue to drive the vehicle and that engineering is currently developing a solution which will be available in Q3 2024. Monitor OASIS and schedule a follow up appointment with the customer when the fix becomes available.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10248998-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10248998-9999.pdf)

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

## Components

Body and frame, Engine

## Vehicles listed

- 2021 to 2024 FORD BRONCO

## Recalls for the same vehicles and component

- [26V468000](/recalls/nhtsa/26V468000.md), 2026-07-20: ENGINE; ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
- [26V403000](/recalls/nhtsa/26V403000.md), 2026-06-24: STRUCTURE:BODY
- [2026229](/recalls/tc/2026229.md), 2026-05-12: Structure
- [26V299000](/recalls/nhtsa/26V299000.md), 2026-05-12: STRUCTURE:BODY:ROOF AND PILLARS
- [2025253](/recalls/tc/2025253.md), 2025-05-09: Structure
- [2024492](/recalls/tc/2024492.md), 2024-08-23: Engine
- [24V635000](/recalls/nhtsa/24V635000.md), 2024-08-23: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [2024248](/recalls/tc/2024248.md), 2024-04-26: Structure
- [2024157](/recalls/tc/2024157.md), 2024-03-11: Structure
- [2024123](/recalls/tc/2024123.md), 2024-02-23: Structure

## Other bulletins for the same vehicles and component

- [SSM 55228](/bulletins/11038440.md), 2026-10-12, Service bulletin: ENGINE; UNKNOWN OR OTHER. Some 2020\-2026 Aviator/Explorer/F\-150/Bronco/Ranger vehicles equipped with a 2.7L or 3.0L \(non\-diesel\) engine may need the front engine cover removed and reinstalled for various reasons. The Workshop Manual \(WSM\), Section 303\-01 Engine \> Removal and Installation \> Engine Front Cover service procedure has been updated to include a new essential special service tool \(ESST\) guide pin alignment tool \(303\-1790\) that is used to align the engine front cover to the engine block, preventing the O\-ring seal on the engine oil galley feed tube from getting damaged during installation.
- [TSB 26\-2380](/bulletins/11037537.md), 2026-09-29, Service bulletin: SUSPENSION; ELECTRICAL SYSTEM; STRUCTURE:BODY; UNKNOWN OR OTHER. This article supersedes TSB 25\-2575 to update the Parts list to add the applicable body wiring harnesses and underbody shield bolts. Some vehicles listed in the Model statement above may exhibit a "Sta\-bar Disconnect Service Required" message in the instrument panel cluster \(IPC\) with any of the following diagnostic trouble codes \(DTCs\) stored in the chassis control module \(CHCM\): C103A, C1A99, C1B03, C1B07, C1B14 and/or B1A67. This may be due to water intrusion in the stabilizer bar wiring harness connector.
- [SSM 55118](/bulletins/11036529.md), 2026-09-01, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER; STRUCTURE:BODY. Some of the following vehicles: \* 2023\-2025 F\-Super Duty built on or before 02\-Feb\-2025 \* 2024\-2026 Ranger/Bronco/Mustang \* 2024\-2025 F\-150 built on or before 15\-Jul\-2025 \* 2024\-2025 Nautilus built on or before 16\-Feb\-2025 \* 2025 Explorer/Aviator built on or before 01\-Feb\-2025 may exhibit all of the following symptoms: \- "No Key Detected" message displayed on the instrument panel cluster \(IPC\). \- Key fob does not work in the backup slot. \- Remote keyless entry \(RKE\) \(lock and unlock from the key fob\) functionality will work to lock/unlock the vehicle. If the vehicle exhibits these symptoms, start the vehicle using both key fobs. If the no crank/no start condition with "No Key Detected" concern is present, reprogram both key fobs and retest. If the no crank/no start condition with "No Key Detected" is still present, replace the body control module \(BCM\). Refer to Workshop Manual \(WSM\), Section 419\-10. For claiming, use causal part 15604 and labor operation MT55118SSM up to 1.8 hours.
- [SSM 55009](/bulletins/11035101.md), 2026-07-20, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Some 2021\-2026 Bronco vehicles may exhibit a "Park Brake Limited Function Service Required" message in the instrument panel cluster \(IPC\). This may be due to an issue with the driver door harness connector after removing and installing the removeable doors. If diagnostic trouble code \(DTC\) B1625:29 is stored in the driver door module \(DDM\), inspect connector C322C between the upper and lower door hinges that attaches to the body for proper installation and/or pin fitment. Repair as necessary. If the condition was caused by improper door installation, do not submit a claim for this condition. If no concerns are found with the connector, refer to Workshop Manual \(WSM\), Section 501\-11 \> Diagnosis and Testing for normal diagnostics.
- [TSB 26\-2298](/bulletins/11034123.md), 2026-06-29, Service bulletin: VISIBILITY/WIPER; STRUCTURE:BODY; UNKNOWN OR OTHER. This article supersedes 25\-2551. Reason for update: to correct the descriptions for the liftgate glass weather seals. Some of the vehicles listed in the model statement above may exhibit paint wearing along on the top inner edge of the tailgate where the rear window weather strip contacts the tailgate. This may be due to the accumulation of dirt between the rear window seal and tailgate.
- [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
- [TSB 26\-2210](/bulletins/11033573.md), 2026-06-05, Service bulletin: POWER TRAIN; ENGINE. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: \* Engine misfire condition \* Illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\) P0301, P0302, P0303, and/or P0304 stored in the powertrain control module \(PCM\)
- [HVAC\-22.AA.AC Bronco](/bulletins/11032713.md), 2026-05-15, Over\-the\-air update: POWER TRAIN; ENGINE; UNKNOWN OR OTHER. Quality improvements include: \- Optimizes cabin ventilation strategy at high speeds
- [SSM 54794](/bulletins/11032564.md), 2026-05-08, Service bulletin: STRUCTURE:BODY. Some 2024\-2025 Bronco vehicles may exhibit a wind noise that has been isolated to the hard top front panel seal. An updated part has been released for service \(5\-door: M2DZ\-78503A22\-C and 3\-door: M2DZ\-98503A22\-C\). Refer to Workshop Manual, Section 501\-18B Hard Top \> Removal and Installation \> Hard Top Front Panel Seal.
- [24N12 S2](/bulletins/11030911.md), 2026-04-07, Other: ENGINE. Certain 2021 \- 2022 Model Year Various Vehicles Engine Valve Inspection Test This submission includes : Technical Instructions Updated wording and description with additional photo.

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