Standard Ignition TH438 Throttle Position Sensor

Throttle Position Sensor for BMW Applications

Standard Ignition TH438 is a throttle position sensor built for direct replacement on select BMW models. It uses a female plug-in connector and a 3-terminal bullet-style interface to match the original electrical layout on the vehicle.

Compatible With 1985-1989 BMW 635CSi, 1988 BMW 535is, 1985-1987 BMW 535i, and 1985-1986 BMW 735i. This Standard Ignition TH438 throttle position sensor supports accurate throttle signal feedback for drivability-focused BMW repair work.

Key Features

• Throttle position sensor for emission control and engine management systems
• Female connector with plug-in connection style
• 3-terminal design with bullet terminals
• Direct-fit electrical configuration for select BMW models
• Standard Ignition TH438 replacement part number

Detailed Description

The Standard Ignition TH438 is a throttle position sensor used to report throttle angle to the engine control system. On BMW 635CSi, 535is, 535i, and 735i applications, this sensor helps maintain proper throttle signal input so the vehicle computer can respond correctly to changing accelerator position. The connector and terminal layout are specified to match the original-style connection points for the listed fitments.

This part cross-references 2-60060 and EC3394 for the same application. When replacing a worn or inconsistent BMW throttle position sensor, TH438 provides a service part option identified by the Standard Ignition TH438 part number.

What It Helps Solve

• Erratic throttle signal readings
• Hesitation during acceleration
• Unstable idle related to throttle input faults
• Check engine light conditions tied to throttle position sensor output
• Poor throttle response on listed BMW models

Installation Notes and Tips

Verify connector style, terminal layout, and throttle body mounting points before installation. Confirm the sensor is matched to the exact BMW year and model listed above, including 1985-1989 BMW 635CSi and the other supported applications. After installation, inspect the connector for a secure fit and check throttle signal operation with the engine running.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. TH438 is built to serve as a replacement throttle position sensor for the listed BMW applications.