October 27, 2023 NHTSA CAMPAIGN NUMBER: 23V727000
Low Brake Fluid Warning Inoperative/FMVSS 135
Without a low brake fluid warning light, the vehicle may be driven with low brake fluid, reducing braking performance and increasing the risk of a crash.
NHTSA Campaign Number: 23V727
Manufacturer Ford Motor Company
Components ELECTRICAL SYSTEM
Potential Number of Units Affected 187,922
Summary
Ford Motor Company (Ford) is recalling certain 2020-2023 Mustang vehicles. The brake fluid level sensor may not activate the visual warning indicator when the brake fluid is low. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 135, “Light Vehicle Brake Systems.”
Remedy
Dealers will update the body control module software, free of charge. Interim letters notifying owners of the safety risk are expected to be mailed December 4, 2023. Second letters will be mailed once the remedy is available. Owners may contact Ford customer service at 1-866-436-7332. Ford’s number for this recall is 23C35.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Check if your Vehicle has a Recall
October 30, 2023
NEW VEHICLE DEMONSTRATION / DELIVERY HOLD – Advance Notice –
Compliance Recall 23C35
Certain 2020-2023 Model Year Mustang
Body Control Module (BCM) Configuration Update
AFFECTED VEHICLES
| Vehicle | Model Year | Assembly Plant | Build Dates |
| Mustang | 2020-2023 | Flat Rock | February 28, 2019 through April 5, 2023 |
US population of affected vehicles: 186,934. Affected vehicles are identified in OASIS and FSA VIN Lists.
REASON FOR THIS COMPLIANCE RECALL
The affected vehicles may not conform to the requirements specified by Federal Motor Vehicle Safety Standard (FMVSS) 135 Section 5.5 – Brake system warning indicators. When the brake fluid is depleted from the reservoir, the brake system warning indicator lamp does not illuminate.
SERVICE ACTION
DO NOT DEMONSTRATE OR DELIVER any new in-stock vehicles involved in this compliance recall. A complete Dealer Bulletin will be provided to dealers the week of December 4, 2023, when it is anticipated that parts ordering information and repair instructions will be available to support this compliance recall. For new vehicle storage guidelines, refer to EFC13033, Storage Guidelines for New Vehicles.
IMPORTANT: Dealers should open a Repair Order (RO) only when a full dealer bulletin is published. Opening an RO against an Awareness or Advance Notice will result in warranty rejections against a recall.
CUSTOMER NOTIFICATION
Owners of record will be notified via first-class mail after repair instructions and parts ordering information have been provided to dealers.
PLEASE NOTE:
Federal law requires dealers to complete this recall service before a new vehicle is delivered to the buyer or lessee. Violation of this requirement by a dealer could result in a civil penalty of up to $26,315 per vehicle. Correct all vehicles in your new vehicle inventory prior to delivery.
DEALER-OPERATED RENTAL VEHICLES
The Fixing America’s Surface Transportation (FAST) Act law effective June 2016 prohibits a rental company from selling, renting or leasing vehicles subject to a safety or compliance recall. Please consult your legal counsel for legal advice.
23C35 Chronology
On August 28, 2023, an issue pertaining to 2020-2023MY Mustang brake fluid level warning system was brought into Ford’s Critical Concern Review Group (CCRG) for review after this issue was discovered by the Ford Customer Service Division (FCSD) in South Korea. In reviewing this issue, the CCRG learned that the Body Control Module (BCM) is responsible for configuring the interface to the brake fluid level sensor. The BCM conducts diagnostics on that interface and will illuminate the red brake warning indicator when there is an issue. In the 2018 – 2023MY Mustang, the brake fluid sensor is hard-wired to the BCM. For 2020MY, the BCM design on the Mustang was changed from “Gen1” to “Gen1m” and was incorrectly configured to look for a Controller Area Network (CAN) message from the brake fluid sensor instead of the hardwired message.
September – October 2023: Ford’s BCM and Brake Development teams conducted a read-across of all Ford programs and concluded that this BCM issue is only present on 2020-2023MY Mustang. The read across also confirmed that the brake system was changed and the BCM is configured correctly for the 2024MY Mustang. The Brake Development team tested 2019 – 2024MY Mustangs to the requirements in Section 5.5 of FMVSS No. 135, which requires each vehicle “have one or more visual brake system warning indicators, mounted in front of and in clear view of the driver, which meet the requirements of S5.5.1 through S5.5.5.” When tested, the 2020 – 2023MY Mustang vehicles do not meet these requirements with respect to low fluid level diagnostics only. The testing showed that the 2024 MY Mustang does meet those requirements. The 2020 – 2023MY vehicles meet all other requirements for brake system warning lamp illumination.
Ford reviewed FMVSS 135 certification test data from the 2018MY Mustang, which indicates the brake fluid level warning system was working properly. Based on Ford’s review, the Brake Development team did not originally run certification tests on the 2020 – 2023MY Mustang because the brake system was carryover and the Brake Development team was not aware that the BCM configuration parameter was incorrectly set to “CAN”.
As of September 12, 2023, Ford is aware of 123 warranty claims alleging a loss of brake fluid on these vehicles; however, there were no reports of an inoperative brake fluid level sensor.
On October 20, 2023, Ford’s Field Review Committee reviewed the concern and approved a field action.
Ford is not aware of any accidents or injuries relating to this condition.
4 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| FORD | MUSTANG | 2020-2023 |
4 Associated Documents
Manufacturer Notices(to Dealers,etc) – Dealer Notification re NEW VEHICLE DEMONSTRATION / DELIVERY HOLD – Advance Notice – Compliance Recall 23C35 Certain 2020-2023 Model Year Mustang Body Control Module (BCM) Configuration Update
Noncompliance Notice 573 Report
RCLRPT-23V727-9504.PDF 214.19KB
RCLRPT-23V727-9504
Miscellaneous Document – Chronology of Defect
RMISC-23V727-2989.pdf 78.028KB
RMISC-23V727-2989
Recall Acknowledgement
RCAK-23V727-7460.pdf 645.395KB
RCAK-23V727-7460
Latest Recalls Documents
For the Latest and Most Recent Recalls Information Visit the link below…
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=23V727&docType=RCL
Service Information & Reprogramming
Module Reprogramming
| Diagnostic Software | Interface Device | Complete Vehicle Diagnostics | Module Programming | ||
| 1996-2017 Model Year |
2018-Present Model Year |
1996-2017 Model Year |
2018-Present Model Year |
||
| IDS/FDRS | VCM, VCM II, VCMM | X | X | X | X |
| FJDS/FDRS | Compatible J2534 Devices (Including VCM II and VCMM) |
X | X | X | |
Detailed system requirements, installation, and support information for each product is located under the diagnostics tool support tab for each product.
Integrated Diagnostic Software (IDS) / Ford Diagnosis & Repair System (FDRS)
For use with VCM I, VCM II, VMM and VCMM hardware devices only. The complete factory Ford Motor Company vehicle diagnostic tool that provides complete dealership level vehicle diagnostic coverage for all 1996 to present Ford, Lincoln and Mercury vehicles. The IDS software includes time based access to the IDS software, software updates and calibration files.
Ford J2534 Diagnostic Software (FJDS) / Ford Diagnosis & Repair System (FDRS)
For use with compatible J2534 hardware devices. FJDS software provides Ford Module Programming functionality that covers 1996 to present Ford, Lincoln and Mercury module reprogramming functions, plus complete dealership level vehicle diagnostic software for all 2018 to present Ford and Lincoln vehicles. The FJDS software license includes time based access to the FJDS software, software updates and calibration files.
Latest Calibration Information
Module Build Data (As-Built)
Use VIN to obtain As-Built data
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Last update on 2023-11-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.
SEOCONTENT-START
Ó Copyright 2023 Ford Motor Company Stacy L. Balzer Ford Motor Company Director P. O. Box 1904 Service Engineering Operations Dearborn, Michigan 48121 Ford Customer Service Division October 30, 2023 TO: All U.S. Ford and Lincoln Dealers SUBJECT: NEW VEHICLE DEMONSTRATION / DELIVERY HOLD – Advance Notice – Compliance Recall 23C35 Certain 2020-2023 Model Year Mustang Body Control Module (BCM) Configuration Update AFFECTED VEHICLES Vehicle Model Year Assembly Plant Build Dates Mustang 2020-2023 Flat Rock February 28, 2019 through April 5, 2023 US population of affected vehicles: 186,934. Affected vehicles are identified in OASIS and FSA VIN Lists. REASON FOR THIS COMPLIANCE RECALL The affected vehicles may not conform to the requirements specified by Federal Motor Vehicle Safety Standard (FMVSS) 135 Section 5.5 – Brake system warning indicators. When the brake fluid is depleted from the reservoir, the brake system warning indicator lamp does not illuminate. SERVICE ACTION DO NOT DEMONSTRATE OR DELIVER any new in-stock vehicles involved in this compliance recall. A complete Dealer Bulletin will be provided to dealers the week of December 4, 2023, when it is anticipated that parts ordering information and repair instructions will be available to support this compliance recall. For new vehicle storage guidelines, refer to EFC13033, Storage Guidelines for New Vehicles. IMPORTANT: Dealers should open a Repair Order (RO) only when a full dealer bulletin is published. Opening an RO against an Awareness or Advance Notice will result in warranty rejections against a recall. CUSTOMER NOTIFICATION Owners of record will be notified via first-class mail after repair instructions and parts ordering information have been provided to dealers. PLEASE NOTE: Federal law requires dealers to complete this recall service before a new vehicle is delivered to the buyer or lessee. Violation of this requirement by a dealer could result in a civil penalty of up to $26,315 per vehicle. Correct all vehicles in your new vehicle inventory prior to delivery. DEALER-OPERATED RENTAL VEHICLES The Fixing America’s Surface Transportation (FAST) Act law effective June 2016 prohibits a rental company from selling, renting or leasing vehicles subject to a safety or compliance recall. Please consult your legal counsel for legal advice. Ó Copyright 2023 Ford Motor Company QUESTIONS & ASSISTANCE For questions and assistance, contact the Special Service Support Center (SSSC) via the SSSC Web Contact Site. The SSSC Web Contact Site can be accessed through the Professional Technician System (PTS) website using the SSSC link listed at the bottom of the OASIS VIN report screen or listed under the SSSC tab. Sincerely, Stacy L. Balzer
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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-727 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Ford Motor Company Submission Date : OCT 27, 2023 NHTSA Recall No. : 23V-727 Manufacturer Recall No. : 23C35 Manufacturer Information : Manufacturer Name : Ford Motor Company Address : 330 Town Center Drive Suite 500 Dearborn MI 48126-2738 Company phone : 1-866-436-7332 Population : Number of potentially involved : 187,922 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2020-2023 Ford Mustang Vehicle Type : LIGHT VEHICLES Body Style : Power Train : NR Descriptive Information : The recalled Body Control Module (BCM) configuration file was introduced into production on 02/28/2019 and was taken out of production on 04/05/2023. These vehicles are not produced in VIN order. Information as to the applicability of this action to specific vehicles can best be obtained by either calling Ford’s toll-free line (1-866-436-7332) or by contacting a local Ford or Lincoln dealer who can obtain specific information regarding the vehicles from the Ford On-line Automotive Service Information System (OASIS) database. Production Dates : FEB 28, 2019 – APR 05, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Description of Noncompliance : Description of the Noncompliance : The brake fluid level sensor is not properly configured to activate the visual warning indicator when there is a reduction in brake fluid below the recommended level in the master cylinder brake fluid reservoir. FMVSS 1 : 135 – Light vehicle brake systems FMVSS 2 : NR Description of the Safety Risk : Customers will not receive a warning if there is a reduction in brake fluid below the recommended level in the master cylinder brake fluid reservoir, which can increase the risk of a crash. Description of the Cause : The Body Control Module (BCM) was configured to look for a Controller Area Network (CAN) message from the brake fluid sensor. This was an incorrect configuration because the vehicle was equipped with a brake fluid sensor that Part 573 Safety Recall Report 23V-727 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 was hardwired to the BCM. The incorrect configuration parameter prevented performance of the brake fluid sensor diagnostics. Identification of Any Warning that can Occur : None Involved Components : Component Name 1 : Body Control Module Component Description : Body Control Module Component Part Number : LR3T-15604-A* Supplier Identification : Component Manufacturer Name : Ford Motor Company Address : 1 American Road Dearborn Michigan 48126 Country : United States Chronology : Chronology Attached Description of Remedy : Description of Remedy Program : Owners will be notified by mail and instructed to take their vehicle to a Ford or Lincoln dealer to have the BCM reconfigured. There will be no charge for this service. Ford provided the general reimbursement plan for the cost of remedies paid for by vehicle owners prior to notification of a safety recall in May 2023. Ford will forward a copy of the notification letters to dealers to the agency when available. How Remedy Component Differs The BCM on these vehicles will be reconfigured by the dealer to properly Part 573 Safety Recall Report 23V-727 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 from Recalled Component : illuminate the brake fluid warning indicator when the master cylinder reservoir is low as required by FMVSS 135 S5.5.1. BCM part number: LR3T-15604-A* Identify How/When Recall Condition was Corrected in Production : The brake system was changed and the BCM is configured correctly for the 2024MY Mustang Recall Schedule : Description of Recall Schedule : Notification to dealers is expected to occur on October 30, 2023. Mailing of owner notification letters is expected to begin December 4, 2023 and is expected to be completed by December 8, 2023 instructing customers to take their vehicle to a Ford or Lincoln dealer to have the BCM reconfigured. Planned Dealer Notification Date : OCT 30, 2023 – OCT 30, 2023 Planned Owner Notification Date : DEC 04, 2023 – DEC 08, 2023 * NR – Not Reported
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