Standard Ignition ALS501 Tire Pressure Monitoring System Sensor - Rear Left

OE-Style TPMS Sensor for Ford Rear Left Applications

Standard Ignition ALS501 is a tire pressure monitoring system sensor built for rear left wheel applications on select Ford and Mercury vehicles. It uses an OE-matching Hall sensor signal for consistent performance and a fiberglass-filled thermoplastic cover to help resist heat stress over time.

Compatible with 2005-2007 Ford Five Hundred, rear left; 2005-2007 Ford Freestyle, rear left; and 2005-2007 Mercury Montego, rear left. This Standard Ignition ALS501 is engineered for precise signal output and dependable wheel-mounted TPMS operation.

Key Features

• OE-matching Hall sensor signal for factory-style TPMS communication
• Fiberglass-filled thermoplastic sensor cover for added heat resistance
• Wheel-mounted, bolt-mount design
• Female round connector with 1 connector and 2-pin male terminals
• 43.5-inch harness length for the specified rear left installation
• Designed and manufactured with controlled quality processes

Detailed Product Overview

The ALS501 is a direct-fit TPMS sensor solution for rear left wheel positions on the listed Ford Five Hundred, Ford Freestyle, and Mercury Montego model years. Standard Ignition builds this sensor to match OE signal behavior, helping the vehicle’s TPMS system read tire pressure data accurately after installation and relearn. The part number ALS501 is a practical choice when replacing a failed wheel sensor on these applications.

This part cross-references Dorman OE Solutions 695-043 for the same application.

Common Issues This Sensor Can Address

• TPMS warning light staying on after a sensor failure
• Inaccurate or missing tire pressure readings from the rear left wheel
• Sensor signal loss caused by age, heat, or internal component wear
• Need for a replacement TPMS sensor during tire service or wheel repair
• Factory relearn concerns after installing a new rear left wheel sensor

Installation Notes and Tips

Install the sensor at the wheel-mounted rear left position and follow the OEM factory relearn procedure. For the 2007 Ford Freestyle application, no programming is required. Verify connector style, bolt-mount configuration, and harness routing before final assembly to ensure proper fitment and signal transfer.

Quality Assurance

Standard Ignition states that this sensor is designed and engineered for precise performance, with manufacturing quality controlled throughout the production process. The Hall sensor cover is built to withstand heat stress for extended durability and longevity.