Throttle Position Sensor 50231900 50231902 037907385Q 200-1311 for VW Volkswagen Golf

The 50231900 (also listed as 50231902, 037907385Q, WELLS TPS4175, WALKER 200-1311, and STD TH345/TH433) is a throttle position sensor engineered for 1993–1997 Volkswagen Golf models. This TPS sensor detects the throttle opening angle and sends that signal to the engine control unit, which then adjusts fuel injection and ignition timing accordingly. Replacing it with this throttle control sensor restores smooth, predictable engine behavior.
Manufacturing Strength
We have been manufacturing automotive electrical components since 1997. Our modern 10,000-square-meter facility houses over 80 employees, including 6 experienced R&D engineers. Our vertically integrated capabilities cover R&D, production, and sales, ensuring control over every stage of manufacturing.

Our advanced equipment includes CNC lathes, vertical injection molding machines, automatic welding systems, and high-low temperature test chambers. This enables us to maintain a steady monthly output of up to 190,000 units of sensors and related components, meeting the demands of customers worldwide.

Quality Assurance
Each throttle position sensor undergoes rigorous testing to ensure it meets or exceeds original equipment specifications. Our quality control process includes:

Resistance sweep testing – verifies smooth, linear output across the full throttle range

Thermal cycling – validates performance from cold start to operating temperature

Cycle durability – confirms long-term reliability over thousands of actuations

Sealing integrity checks – ensures protection against moisture and contaminants

We follow strict industry standards and keep documented records for every production batch, providing traceability behind every unit.

Q1: Is this throttle position sensor a direct replacement for my Volkswagen Golf?
Yes. It is designed as an OEM replacement for OE numbers such as TH345, TH433, 50231900, 50231902, and 037907385Q, ensuring proper fit and compatibility with Volkswagen Golf models from 1993–1997.

Q2: What does a throttle position sensor do?
The TPS detects the throttle opening angle and sends accurate signals to the ECU to optimize fuel injection, ignition timing, and overall engine performance.

Q3: How can I tell if my throttle position sensor needs replacement?
Common symptoms include unstable engine acceleration, poor throttle response, irregular idling, or reduced fuel efficiency caused by inaccurate throttle position signals.

Q4: How is the quality of this TPS sensor guaranteed?
Each sensor undergoes strict quality control inspections, including material checks, production monitoring, and final performance testing to ensure reliable operation.

Q5: Why choose this TPS sensor instead of a lower-cost alternative?
This sensor offers OEM-level fit, high-quality components, and consistent performance, providing a reliable solution for vehicle repair and maintenance needs.