Standard Ignition ABS Wheel Speed Sensor ALS403
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 2
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 3
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 4
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 5
Standard Ignition ABS Wheel Speed Sensor ALS403
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 2
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 3
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 4
Standard Ignition ABS Wheel Speed Sensor ALS403 - view 5

Front Left ABS Wheel Speed Sensor for 1998-2003 Mercedes-Benz ML320 & More - Standard Ignition ALS403

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$107.99
MPN: ALS403
UPC: 707390491455
Item Package Quantity: 1
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Standard Ignition ABS Wheel Speed Sensor P/N:ALS403
Standard Ignition ABS Wheel Speed Sensor P/N:ALS403
$107.99

Track wheel speed on your Mercedes-Benz M-Class with the Standard Ignition ABS Wheel Speed Sensor ALS403. This front-left sensor drops in as a direct-fit replacement for the 1998-2003 Mercedes-Benz ML320, 1998-2001 Mercedes-Benz ML430, 2002 Mercedes-Benz ML500, and 2000-2003 Mercedes-Benz ML55 AMG. It monitors how fast the wheel is turning and reports that signal to the ABS control module, which the system uses to manage anti-lock braking and, where equipped, traction and stability functions.

  • Position-specific: cataloged for the front-left wheel location on the listed applications.
  • Signal generation: reads wheel rotation and sends the corresponding speed input to the ABS module.
  • Direct-fit: designed to install in place of the original sensor for the listed vehicles.

Signs this sensor may need replacing include an illuminated ABS warning light, a stored wheel-speed fault code, or intermittent ABS operation. Because these symptoms can have other causes, diagnose the circuit before replacing. If a failed front-left wheel speed sensor is the cause, this replaces it.

Interchange: Manufacturer part number ALS403.

Frequently Asked Questions

Which vehicles does the ALS403 fit?

It's a direct-fit replacement for the 1998-2003 Mercedes-Benz ML320, 1998-2001 ML430, 2002 ML500, and 2000-2003 ML55 AMG. See the Buyer's Guide tab to confirm your vehicle.

What wheel position is this sensor for?

It is cataloged for the front-left wheel location on the listed applications.

What does an ABS wheel speed sensor do?

It reads how fast the wheel is turning and sends that speed signal to the ABS control module, which uses it to manage anti-lock braking.

What are signs this sensor may need replacing?

An illuminated ABS warning light, a stored wheel-speed fault code, or intermittent ABS operation. Diagnose the circuit first, since these symptoms can have other causes.

Will replacing this fix my ABS light?

If a failed front-left wheel speed sensor is the cause, this replaces it. Confirm the fault with a diagnostic scan before replacing, as other components can trigger the same light.

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