54.70 GBP
ABS 30129 Wheel Speed Sensor
Wheel speed sensor for accurate vehicle control and safety systems, providing reliable data on wheel rotation.
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ABS 30129 Wheel Speed Sensor
The ABS 30129 Wheel Speed Sensor is a critical component in modern automotive safety systems. It monitors the rotational speed of each wheel, providing real‑time data to the Anti‑Lock Braking System (ABS) and other vehicle stability modules such as Electronic Stability Control (ESC) and Traction Control (TC). By detecting rapid changes in wheel velocity, the sensor enables the braking system to modulate brake pressure, preventing wheel lockup during hard braking or on slippery surfaces.
Key Functional Characteristics
- High Accuracy: Delivers precise wheel speed measurements with minimal error margin, essential for effective ABS operation.
- Robust Construction: Encased in a durable housing that resists impact, vibration, and exposure to road salts, oils, and extreme temperatures.
- Compact Design: Small footprint allows easy integration into existing wheel hub assemblies without requiring extensive modifications.
- Low Power Consumption: Operates efficiently within the vehicle’s electrical system, ensuring reliable performance over long periods.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | 30129 |
| Mounting Type | Replacement part (Pièce de rechange) |
| Quantity per Order | 1 piece |
| Operating Temperature Range | -40°C to +120°C (typical automotive range) |
| Signal Output | Hall‑effect or inductive output, depending on vehicle application |
| Electrical Requirements | 12V DC supply with current draw < 50 mA |
| Physical Dimensions | Approx. 30 mm diameter, 15 mm height (varies by manufacturer) |
| Weight | ~0.17 kg |
Compatibility and Vehicle Applications
The ABS 30129 sensor is engineered to fit a wide range of front‑wheel and rear‑wheel assemblies across multiple vehicle brands. Common applications include:
- Ford: Fiesta, Fusion, Focus, Mustang, and other models equipped with standard ABS modules.
- Mazda: Mazda3, Mazda6, CX‑5, and other vehicles featuring integrated stability control systems.
- Other manufacturers that use the same sensor architecture for wheel speed monitoring.
Installation typically involves removing the existing wheel hub assembly, aligning the sensor with the wheel’s magnetic or inductive pickup, and securing it with the supplied mounting hardware. The sensor’s wiring harness connects to the vehicle’s ABS control unit via a standard 3‑wire connector (signal, power, ground).
Operational Principles
The ABS 30129 Wheel Speed Sensor operates on one of two common technologies:
- Hall‑Effect Sensors: Detect changes in magnetic flux as a magnet embedded in the wheel hub passes by. The sensor outputs a square wave whose frequency is proportional to wheel speed.
- Inductive (Resistive) Sensors: Use a coil and a rotating metal disc with slots or teeth. As the disc spins, it induces voltage pulses in the coil, again producing a frequency‑to‑speed relationship.
In both cases, the sensor’s signal is fed to the ABS control module, which compares wheel speeds across all four wheels. Any discrepancy indicating potential lockup triggers an electronic brake pressure modulation algorithm that reduces hydraulic pressure to the affected wheel(s) and then restores it once traction is regained.
Maintenance and Troubleshooting
- Regular Inspection: Check for visible damage, corrosion, or debris on the sensor housing and wiring. Clean gently with a soft brush if necessary.
- Signal Verification: Use an oscilloscope or diagnostic scan tool to confirm that the sensor outputs a clean square wave at expected frequencies during wheel rotation.
- Common Faults: Loose wiring, damaged connector pins, or excessive vibration can cause intermittent signals. Replace or secure affected components promptly.
Benefits of Using the ABS 30129 Sensor
- Enhanced Safety: Reliable wheel speed data ensures that the ABS and related stability systems function correctly, reducing stopping distances on slippery roads.
- Longevity: Designed for long service life under harsh automotive conditions, minimizing replacement frequency.
- Ease of Integration: Standard mounting interface allows straightforward swap with existing sensors in most vehicles.
Conclusion
The ABS 30129 Wheel Speed Sensor is a cornerstone component for vehicle safety, delivering accurate wheel speed information that powers critical braking and stability functions. Its robust design, compatibility across multiple brands, and straightforward installation make it an essential part of any automotive maintenance or repair workflow focused on preserving the integrity of ABS and related systems.
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 61.90 EUR  60.59 EUR  67.78 EUR  82.49 EUR |
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| Identifiers | |
| Brand |  ABS All Brake Systems is a brake system manufacturer that produces high-quality brake systems for cars, trucks, and motorcycles. The company is known for its innovative products, excellent customer service, and competitive prices. |
| Model | ABS All Brake Systems 30129 |
| MPN | ABS All Brake Systems 30129 |
| ID | 7008467 |
| Dimensions / Weight | |
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