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Rear ABS Wheel Speed Sensor Set for the Toyota T100, Tacoma, and Tundra (1998–2006)

If your T100, Tacoma, or Tundra logs a rear wheel speed sensor code, this 2PCS Rear R&L ABS Wheel Speed Sensor Set replaces both rear sensors in one order. The pair is cross-validated against Toyota OEM numbers 89545-0C010, 89542-0C010, and 89545-04010, plus the Denso 550-0117 interchange.

Fitment covers the T100 (1998), Tacoma (1998–2004), and Tundra (2000–2006), rear axle positions, in 2WD and 4WD configurations where rear ABS is equipped. These are passive magnetoresistive (MR) sensors with a self-generating sinusoidal output, so they feed the stock Toyota/Denso ABS ECU and meet the 2026 benchmarks for SAE J2931/1 signal integrity and ISO 11898-1:2024 CAN-bus backward compatibility.

Full Specification Table

What Is Inside the Sensor

The element pairs a samarium-cobalt (SmCo) bias magnet with a thin-film nickel-iron (NiFe) magnetoresistive bridge, chosen for thermal stability over Hall-effect ICs. A Hall sensor needs a 5–12V reference supply and emits a digital square wave. This passive MR unit generates its own sinusoidal signal, and the amplitude scales with wheel speed, which keeps the signal readable at crawl speeds below 3 mph for off-road descent control and low-traction modulation on 4WD builds.

Durability details worth knowing

• Housing: 30% glass-filled PBT with a UL94 V-0 flammability rating. It resists road salt spray (ISO 9227 NSS, 720+ hours), calcium chloride brine, and hydrocarbon exposure.
• Bracket: SUS304 stainless steel, which removes the galvanic corrosion risk against the cast-iron rear axle housing.
• Sealing: a dual-lip silicone rubber grommet at the wiring harness exit achieves IP69K ingress protection per IEC 60529, aimed at high-pressure steam cleaning in fleet and off-road service.
• Heat margin: the SmCo magnet holds a Curie temperature near 800°C, far above NdFeB alternatives, so exhaust proximity degrades it more slowly.

DTC Codes This Set Addresses

Toyota Techstream, Snap-on, Autel, and generic OBD-II scan tools log the fault families below. The rear codes are the primary coverage for this product:

• C0210 / C0215: right rear / left rear wheel speed sensor signal malfunction, the primary coverage for this set
• C0220 / C0225: rear wheel speed sensor circuit open or short
• P0500: vehicle speed sensor malfunction, rear-sensor-derived, on T100/Tacoma/Tundra platforms
• C1233 / C1234: rear speed sensor signal loss during an ABS event, the intermittent open-circuit case under thermal load
• C0200 / C0205: right front / left front sensor codes, listed for full system diagnostic context only

Codes clear once the installed sensors hold the 1.2–1.8 kΩ resistance spec and the 800–1,400 mVpp output envelope, values cross-verified against Toyota's factory ECU threshold calibration for the 1998–2006 range.

Replace in Pairs, Then Verify with a Scan Tool

A single-sensor swap is electrically permissible, but paired replacement is strongly recommended. A new sensor outputs a slightly different amplitude curve than a 100k+ mile unit with magnetic degradation, and that left-to-right delta can read as a wheel-slip differential at the ABS ECU, triggering premature ABS intervention during threshold braking.

This set holds both sensors within a ±3% amplitude tolerance band, factory-validated on a dynamic tone-ring simulator. After the install, connect a scan tool with ABS module access (Toyota Techstream, Autel MaxiSYS, Snap-on ZEUS+) and check two readings at 15 mph on a straight, level surface:

• Rear RL/RR wheel speed values within ±1.5 mph of each other and within ±2 mph of the front sensors.
• Sensor voltage amplitude within 10% between the two rear channels.

Deviations beyond those numbers point to an air gap problem, tone-ring damage, or a defective sensor. Since the 0.4–1.2 mm gap self-adjusts through the integrated spacer ring, a reading that far off usually means hardware damage rather than a mounting error.

Service Life Under Real Duty Cycles

Projected life is 120,000–150,000 miles (193,000–241,000 km) or 8–10 years under normal mixed-duty cycles. Two things shorten it: sustained exposure above 140°C, such as exhaust routing near the sensor on Tundra V8 applications, and chronic submersion in brine or silt.

The SKU carries Koeep's limited lifetime warranty against manufacturing defects, with technical support available for DTC verification and installation guidance.

Related Parts for the Same Trucks

Rear ABS codes often show up alongside other sensor wear on high-mileage Toyotas. If your 1999–2004 Tacoma or T100 2.7L also idles rough or burns extra fuel, check the Mass Air Flow Meter Sensor (MAF) for the 2.7L L4 while the truck is already on the lift.

A tired oxygen sensor can mimic the drivability problems that send people chasing speed sensor codes first. The matching oxygen sensor covers 1994–2004 T100 Pickup, Tacoma, and 4Runner applications.

When the fault points at wiring, the ABS module, or the starting and charging system instead, the starters, alternators, and ECUs collection covers the electrical side of the catalog.

More rear-axle reading

Since you will already be working at the rear axle, the 926-993 differential cover guide for the 4Runner and Tacoma (1995–2004) pairs well with rear brake and sensor service.

Ordering and Support

Need a fitment check before you order? Send the exact DTC and your truck's year to support@koeep.com, message the team on WhatsApp, or submit the request for quote form for bulk and fleet pricing.

Frequently Asked Questions

Published: 2026-05-14 | Koeep.com, auto and motorcycle replacement parts | All specifications come from the source product data and its cited 2026 SAE/ISO compliance matrices.