Standard Ignition LSH120 Headlight Level Sensor - Rear Left

Headlight Level Sensor for Rear Left Applications

Standard Ignition LSH120 is a plug-in headlight level sensor used on rear left suspension-mounted leveling systems. It is built for direct electrical connection and is listed for select Lexus GX470 and Toyota 4Runner applications from 2003-2009.

Key Features

• Plug-in connector type for straightforward electrical connection
• Headlight level sensor for rear left position
• Fits 2003-2009 Lexus GX470, rear left
• Fits 2003-2009 Toyota 4Runner, rear left
• Standard Ignition part number LSH120

Detailed Description

Standard Ignition LSH120 is a headlight level sensor that monitors vehicle ride height and sends position data to the leveling system. On vehicles such as the Lexus GX470 and Toyota 4Runner, this sensor helps the headlamp system respond to suspension movement so beam aim stays properly adjusted during load changes and driving conditions. This part cross-references HLS554 and HSL120 for the same application.

Common Issues It May Address

• Headlights aiming too high or too low
• Leveling system warning or sensor-related fault codes
• Inconsistent beam height after suspension movement
• Rear left sensor signal loss or electrical connection problems
• Improper headlamp leveling on 2003-2009 Lexus GX470 and Toyota 4Runner models

Installation Notes and Tips

Verify rear left mounting location before installation and confirm connector style matches the vehicle harness. Inspect the linkage, mounting points, and wiring for wear or corrosion before replacing the sensor. After installation, clear any stored fault codes and confirm headlamp leveling operation.

Quality Assurance

Standard Ignition is a recognized aftermarket source for electrical and engine management components. LSH120 is identified for direct-fit use on the listed applications and should be matched by year, make, model, and rear left position before installation.