Subaru made a design change to the rear anti-lock braking system (ABS) wheel speed sensors on 2015-2018 Legacy and Outback vehicles. The change involves an additional shielding cover to protect the harness from road debris damage.
RIGHT REAR SPEED SENSORS
2015 Outback.................. 27540AL 10B
2015-2018 Outback...............27540AL 12B
2015-2018 Legacy..................27540AL 08B
LEFT REAR SPEED SENSORS
2015 Outback...................... 27540AL 11B
2015-2018 Outback............. 27540AL 13B
2015-2018 Legacy................ 27540AL 09B
Note: Order the most up-to-date parts based on the vehicle’s specific VIN.