Used OEM Acura ABS Pump & Module — Buyer's Guide & Replacement Cost

Published by GreenGears Auto | 7 min read | ABS System Guide

The ABS warning light is one of the most misdiagnosed faults in automotive repair. Many owners replace the ABS pump immediately after the light comes on — only to find the light returns because the actual fault was a wheel speed sensor that costs $35. This guide walks through how to diagnose an ABS pump failure correctly, what a used OEM pump costs vs new, and what to check before ordering.

What Is a Acura ABS Pump & Module?

The ABS pump assembly — also called the HCU (Hydraulic Control Unit) or ABS modulator — combines two components: the hydraulic valve block and pump motor that physically modulates brake pressure, and the ABS control module that receives wheel speed sensor data and commands the pump. On many vehicles these are sold as a combined assembly. On others they are separate. Always confirm which component has failed before ordering a replacement.

Acura shares platforms with Honda but uses different SH-AWD and VTEC specifications — parts that appear physically identical to Honda units may have different calibration or flow rates.

Diagnosing Acura ABS Pump & Module Failure

ABS pump failure is frequently misdiagnosed because the warning light triggers for many unrelated faults. Always pull chassis fault codes (C-codes) with an ABS-capable scanner before condemning the pump.

C0265 / C0267 — ABS Motor Relay / Pump Motor Fault

These codes confirm the ABS pump motor itself has failed electrically. The relay powering the pump motor is not completing its circuit, or the motor has an open or short internally. This is a genuine pump failure — the unit needs replacement.

C0H00 / C0242 — ABS Control Module Internal Fault

The ABS computer has failed internally. On vehicles where the module is integral to the HCU assembly, the entire unit must be replaced. On vehicles with a separate module, only the module needs replacement — confirm your vehicle's configuration before ordering.

C1234 / C1235 / C1236 / C1237 — Wheel Speed Sensor Faults (NOT the pump)

This is the most common misdiagnosis. Wheel speed sensor faults disable the ABS system and trigger the warning light — but the pump is functioning perfectly. Each code corresponds to a specific wheel. A wheel speed sensor costs $25–$80. Always check for these codes first.

ABS, Traction Control, and Stability Control Lights All On

When the ABS pump fails, traction control and ESC — which depend on the same pump — also disable simultaneously. All three warning lights coming on together is a strong indicator of pump or module failure rather than a sensor fault, which typically illuminates only the ABS light.

⚠️ Basic OBD Scanners Cannot Read ABS Fault Codes The ABS warning light triggers C-codes (chassis codes), not P-codes (powertrain codes). A basic code reader will show no faults even when the ABS light is on. An ABS-capable scanner is required to identify the actual fault before any parts are ordered.

Used OEM vs New vs Aftermarket — Cost Comparison

Option	Typical Cost	Key Consideration
New OEM (Dealer)	$450–$1,800	Maximum reliability but rarely necessary — ABS pump hydraulics don't wear like mechanical components
Used OEM (GreenGears)	$95–$420	Factory original from documented low-mileage donor. Sealed hydraulics unaffected by donor mileage. 15-day warranty.
Remanufactured	$180–$650 + core	Quality varies by rebuilder. Core charge ($80–$200) adds to total cost.
Aftermarket (new)	$120–$380	Pressure calibration and solenoid response may differ from OEM — can cause persistent fault codes on some platforms.

🔧 ABS Bleed Is Mandatory After Replacement Any ABS pump replacement requires a scan-tool-controlled ABS bleed procedure to purge air from the hydraulic unit. A standard gravity or pressure bleed does not reach the ABS modulator chambers. Skipping this step causes a spongy pedal and may trigger fault codes on an otherwise good pump.

What to Confirm Before Ordering a Used OEM Acura ABS Pump & Module

Confirm fault codes are pump codes (C0265, C0267, C0242) — not wheel speed sensor codes (C12XX) before ordering
Confirm whether your vehicle has ABS only, or ABS with traction control and ESC — different pump configurations
Match the part number exactly — ABS assemblies differ between 2WD and AWD on many platforms
Provide your VIN — ABS assembly part numbers can change mid-production-year
Confirm with your installer whether VIN programming is required after installation for your platform
An ABS bleed procedure using a scan tool is required after any pump installation — budget for this

Used OEM Acura ABS Pump & Module — 5 Parts Available

All units sourced from quality-inspected US salvage donors. Free shipping to the contiguous US. 15-day returns from confirmed delivery. Provide your VIN before ordering for fitment confirmation.

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Can't find your specific application? Contact us with your VIN — we'll search our salvage yard network and confirm availability before anything ships.

Shop Used OEM Acura Parts — Verified, Warranted, Free Shipping

Every unit from a documented low-mileage US donor. VIN fitment confirmed before dispatch.

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