Understanding the Wheel Speed Sensor on Your 2021-2024 Ford Bronco
Seeing ABS, traction control, or 'Service AdvanceTrac' warnings? A bad wheel speed sensor is a likely cause.
- The 2021-2024 Bronco uses four individual ABS Wheel Speed Sensors, not a single Vehicle Speed Sensor.
- A cascade of warning lights (ABS, AdvanceTrac, G.O.A.T. Mode fault) is the primary symptom of a failed sensor.
- Before replacing, always inspect and clean the sensor and its mounting surface, as debris or rust is a common cause of failure.
- Replacement is simple, requiring basic tools, making it an excellent DIY-friendly repair.
Why Your Bronco Uses Wheel Speed Sensors
Forget what you might know about older vehicle speed sensors. The modern Ford Bronco relies on a more advanced system. It places a sensor at each wheel hub to get precise speed data. This allows the vehicle's computer to make instant decisions about braking, traction, and stability, which is especially important for off-road G.O.A.T. modes and on-road safety systems like Pre-Collision Assist. When one of these sensors fails, it can cause a cascade of warning lights and disable key features.
Symptoms of a Failing Bronco Wheel Speed Sensor
A bad wheel speed sensor usually makes itself known with a Christmas tree of lights on your dashboard. Because the sensor's data is used by so many systems, a single failure can trigger multiple alerts. Look for:
- ABS Light: This is the most common symptom. The system can't trust the data, so it shuts down the anti-lock braking feature.
- Service AdvanceTrac Light: The stability and traction control system, called AdvanceTrac, will be disabled. 🎬 Watch: Understanding Service AdvanceTrac warnings and how to fix them.
- Disabled G.O.A.T. Modes: The truck may revert to 'Normal' mode and prevent you from selecting other terrain modes.
- Other Warnings: You may also see messages like 'Pre-Collision Assist Not Available' or 'Park Aid Fault'.
Mechanic's Tip: Check Before You Replace
Bronco owners on forums report that off-roading can cause debris, mud, or even bits of factory sealant to get stuck to the magnetic tip of the sensor, causing a fault. Before buying a new part, remove the single 8mm bolt holding the sensor, pull it out, and inspect it. Cleaning the tip and the mounting surface of rust or debris can sometimes fix the problem for free.
🎬 See how cleaning your sensors can clear ABS dash codes.Choosing the Right Aftermarket Sensor: OEM vs. Standard Ignition
When it's time to replace a sensor, you have options. An OEM sensor from Ford costs between $65 and $101. Aftermarket sensors, like those from Standard Ignition, offer a more affordable alternative. Standard Ignition is a well-known brand that has been making quality replacement parts for decades. Their sensors are designed to match the fit and function of the original part, often including the correct wire lengths and mounting clips, which makes installation easier. For a component like a wheel speed sensor, a quality aftermarket part from a reputable brand like Standard is a reliable and cost-effective choice.
| Part Type | Price Range |
|---|---|
| New OEM (Ford) | $65 - $101 |
| New Aftermarket (Standard Ignition) | $22.57 - $63.05 |
| Shop Labor to Install | $85 - $125 |
Frequently Asked Questions
Can I replace a Bronco wheel speed sensor myself?
Yes, this is a very DIY-friendly job. The sensor is typically held in by a single bolt and has a simple electrical connector. The most common tool needed is an 8mm socket or wrench. The job takes less than 30 minutes per wheel.
🎬 Watch this walkthrough on how to replace an ABS sensor.Where is the wheel speed sensor located on the Bronco?
There is one sensor at each wheel, mounted to the back of the wheel hub/knuckle assembly. The front sensors are integrated into the hub assembly, while the rear sensors are inserted into the axle housing.
Is there a recall for the Ford Bronco wheel speed sensor?
As of early 2026, there are no specific recalls issued by the NHTSA for the wheel speed sensors on the 2021-2024 Ford Bronco. There are recalls for other systems, but none that directly address a widespread failure of this part.
Are there any Technical Service Bulletins (TSBs) for this issue?
Yes, Ford has issued TSBs related to the ABS system. For example, TSB 22-2354 addresses illuminated ABS and stability control lights with a specific trouble code (C1013:09). Another, TSB 22-2255, involves a software update to the ABS module to fix issues with the traction control switch. This shows that some issues may be software-related, so a proper diagnosis is key.
What's the difference between a wheel speed sensor and a transmission speed sensor?
Your Bronco has both. The four wheel speed sensors measure individual wheel rotation for ABS, stability control, and the speedometer. The transmission also has input and output speed sensors that are used internally by the transmission control module to manage gear shifts. The warning lights described in this article are almost always caused by a faulty wheel speed sensor.
Helpful Videos
Technical Specifications
OEM Part Numbers: MB3Z-2C205-A BRAB-643 BRAB-642
Typically a 2-terminal, bolt-in magnetic sensor. Includes harness with pre-installed clips.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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