Standard Ignition ALS1278 rear left ABS wheel speed sensor for the 1996-2002 Toyota 4Runner reads wheel rotation and sends the speed signal to the ABS system. This Standard Ignition ABS wheel speed sensor is engineered specifically for Toyota vehicles.
An ABS or traction control warning light can mean this sensor is worn, though a damaged harness or a damaged tone ring at the same wheel can be behind it too, so rule those out before you replace the sensor.
It fits the 1996-2002 Toyota 4Runner, which takes one sensor at the rear left. This listing is one sensor, and the rear right is a separate part.
Fit and size
Build and materials
One ABS wheel speed sensor. Mounting hardware is not included, so plan on a new bolt for the mounting hole, since the old one may not be reusable.
Product information is for general reference and may contain errors. See our Disclaimer.
Does the Standard Ignition ALS1278 fit the rear left of a 1996-2002 Toyota 4Runner?
Yes. The Standard Ignition ALS1278 is the rear left ABS wheel speed sensor for the 1996-2002 Toyota 4Runner, and the car takes one at that position.
Does the ALS1278 sensor come with mounting hardware?
No. Mounting hardware is not included; the sensor has one bolt hole, and the harness carries grommets and wire clips for routing.
How long is the harness on the Standard Ignition ALS1278?
The Standard Ignition ALS1278 harness is 46 inches (1165 mm) long and ends in a rectangular female connector with two male blade terminals.
What does a bad rear left ABS wheel speed sensor look like on the dash?
An ABS warning light can come on, and the ABS may not work as normal. A shop can scan the system and test the sensor to confirm.
Where does the ALS1278 sensor mount?
It mounts on the spindle at the rear left wheel and has one bolt hole.
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Standard Motor Products
Standard Motor Products
Standard Motor Products
Standard Motor Products
Standard Motor Products
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
