Delphi SS21285 ABS Wheel Speed Sensor - Rear

Rear ABS Wheel Speed Sensor for Audi

The Delphi SS21285 rear ABS wheel speed sensor is built for Audi vehicles that rely on accurate wheel-speed input for braking and stability systems. It uses OE-level development and validation methods, with calibration to OE standards for consistent signal output and reduced comebacks.

Compatible with a wide range of rear applications, including Audi A4, A5, Q5, Q7, Q8, S4, S5, S6, S7, S8, RS models, and e-tron variants, this sensor is a direct-fit service part for the rear position. The Delphi SS21285 is a practical replacement when the original sensor is damaged, contaminated, or no longer reporting correctly.

Key Features

• Rear ABS wheel speed sensor for Audi applications
• Delphi part number SS21285
• OE-standard testing and calibration for accurate readings
• 1 square connector with 2 male terminals
• Blade terminal type
• Package contents: ABS wheel speed sensor and instruction sheet
• No mounting hardware included
• No wiring harness included

Detailed Description

Delphi SS21285 is an ABS wheel speed sensor engineered for rear-wheel installation on select Audi vehicles from 2016 through 2023. It supports braking control systems by sending wheel-speed data used by ABS and related chassis electronics. This part cross-references 4M0 927 807 C and 5S17267 for the same application.

Use this sensor on rear-fit Audi A4, A5, A6, A7, Q5, Q7, Q8, S4, S5, S6, S7, S8, RS5, RS6 Avant, RS7 Sportback, RS Q8, SQ5, SQ7, SQ8, and e-tron models where the OE-style rear sensor is required. The Delphi SS21285 is a direct replacement choice for service work that demands correct signal output and reliable fitment.

What It Helps Address

• ABS warning lights caused by a failed rear wheel speed sensor
• Loss of wheel-speed signal to braking and stability systems
• Intermittent traction control or stability control faults
• Erratic speed data from a damaged or contaminated sensor
• Brake system fault codes related to rear sensor input

Installation Notes and Tips

• Confirm rear position fitment before installation.
• Inspect the connector, tone ring, and wiring path for damage or corrosion.
• Clear fault codes after installation and verify live wheel-speed data.
• Follow the included instruction sheet for vehicle-specific service steps.
• Use the OE connector style and terminal layout to confirm match before assembly.

Quality Assurance

Delphi backs this sensor with OE development and product validation methods, and each unit is tested and calibrated to OE standards for accurate readings. That level of validation helps support dependable operation in Audi braking and stability systems.