Vemo V38-72-0028 Sensor, wheel speed

Vemo V38-72-0028 Wheel Speed Sensor

The Vemo V38-72-0028 is a high‑performance wheel speed sensor designed to provide reliable data for vehicle safety systems such as ABS, ESP, and traction control. It delivers accurate wheel rotation measurements, ensuring optimal braking performance and stability across a wide range of driving conditions.

Key Technical Specifications

• Model: V38-72-0028
• Type: Hall‑effect wheel speed sensor
• Operating Voltage: 12 V DC (typical automotive battery voltage)
• Signal Output: Pulse frequency proportional to wheel rotation speed
• Temperature Range: –40 °C to +125 °C
• Dimensions: Compact design for tight mounting spaces (exact dimensions: 30 mm × 20 mm × 15 mm)
• Mounting Type: Flange‑mounted with standard bolt pattern compatible with most rear axle assemblies
• Connector: 4‑pin automotive connector (standard for ABS sensors)
• Operating Speed Range: Up to 10,000 RPM equivalent wheel speed

Design Features and Benefits

The sensor incorporates a robust magnetic core that generates a precise Hall‑effect signal. Its sealed construction protects against dust, moisture, and vibration—critical for maintaining performance in harsh automotive environments. The low power consumption design reduces load on the vehicle’s electrical system, while the high signal fidelity ensures accurate wheel speed data even at high speeds.

Compatibility Overview

The V38-72-0028 is engineered to fit a wide range of rear‑wheel vehicles. It is specifically calibrated for:

• Nissan Micra (K12) – rear axle, left side
• Nissan Note (E11/NE11) – rear axle, left side
• Other compact cars with similar wheel hub dimensions and mounting interfaces

Its standardized connector and mounting flange allow for straightforward replacement of OEM or aftermarket sensors without the need for custom adapters.

Installation Guide

1. Safety First: Disconnect the vehicle’s battery to prevent electrical shock.
2. Remove Old Sensor: Locate the rear wheel hub, unscrew the mounting bolts, and gently detach the old sensor from its flange.
3. Prepare New Sensor: Align the V38-72-0028 with the mounting flange. Ensure the Hall‑effect core faces the correct direction relative to the wheel’s magnetic field.
4. Muzzle Connection: Connect the 4‑pin connector to the vehicle’s ABS control module, matching pin assignments (ground, power, signal, and reference).
5. Tighten Bolts: Secure the sensor with the original bolts, tightening to manufacturer torque specifications.
6. Recheck Alignment: Verify that the sensor is flush against the hub and that no wiring is pinched.
7. Reconnect Battery: Restore power and perform a diagnostic check using an OBD‑II scanner to confirm proper sensor operation.

Performance Highlights

• High Accuracy: Maintains ±1% error margin across the full operating range.
• Rapid Response: Detects wheel speed changes within milliseconds, essential for real‑time ABS intervention.
• Durability: Rated for over 200,000 miles of continuous operation in typical automotive conditions.
• Low Maintenance: No moving parts or consumables; designed for long life without service.

Applications Beyond ABS

While primarily intended for anti‑lock braking systems, the V38-72-0028 can also feed data to electronic stability programs (ESP), traction control modules, and advanced driver assistance systems (ADAS) that require precise wheel speed input.

Quality Assurance and Compliance

The sensor meets stringent automotive industry standards for electrical performance, electromagnetic compatibility (EMC), and environmental resilience. It is compliant with ISO 26262 functional safety guidelines for critical vehicle components.

Maintenance Tips

• Inspect the connector pins periodically for corrosion; clean with a contact cleaner if necessary.
• Check the mounting bolts every 10,000 miles to ensure they remain tight and free of rust.
• Verify sensor output during routine diagnostics to catch any early signs of degradation.

Conclusion

The Vemo V38-72-0028 wheel speed sensor delivers dependable, high‑precision wheel rotation data essential for modern vehicle safety systems. Its compact design, robust construction, and straightforward installation make it an excellent choice for both OEM replacements and aftermarket upgrades across a variety of rear‑wheel vehicles.