HomeEmission Control > SensorsStandard Ignition TH121 Throttle Position Sensor
Part #: TH121

Standard Ignition TH121 Throttle Position Sensor

12 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Nissan, D21, Pathfinder, and Pickup
Easy Returns — Return within 60 days for a full refund
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Reliable Throttle Position Sensor for Nissan D21, Pathfinder, and Pickup

The Standard Ignition TH121 throttle position sensor is designed to provide accurate throttle position readings for Nissan vehicles including the D21, Pathfinder, and Pickup models. This sensor ensures proper engine performance by delivering precise data to the vehicle’s engine control unit.

  • Connector Gender: Female; female for secure connections
  • Connector Quantity: 2 plug-in connectors for reliable interface
  • Terminal Gender: Male blade terminals for consistent electrical contact
  • Terminal Quantity: 6 terminals to support multiple signal pathways
  • Terminal Type: Blade terminals designed for durability and ease of installation

Detailed Product Description

The Standard Ignition TH121 throttle position sensor features two female plug-in connectors that interface with the vehicle’s wiring harness, ensuring a stable and secure connection. It includes six male blade terminals that provide multiple contact points for accurate signal transmission. This design supports consistent throttle position feedback, which is critical for engine management systems in Nissan D21, Pathfinder, and Pickup models. The sensor’s plug-in connector type simplifies installation and replacement, reducing downtime during maintenance.

Common Applications and Issues Addressed

  • Helps resolve erratic engine idling caused by faulty throttle position readings
  • Addresses hesitation or stalling during acceleration in Nissan D21, Pathfinder, and Pickup vehicles
  • Improves throttle response and fuel efficiency by providing accurate sensor data
  • Prevents check engine light triggers related to throttle position sensor faults
  • Supports smooth transmission shifting by maintaining proper throttle input signals

Installation Notes and Tips

When installing the Standard Ignition TH121 throttle position sensor, ensure the connectors are fully seated to avoid intermittent electrical issues. The female plug-in connectors and male blade terminals are designed for straightforward replacement without the need for special tools. Verify sensor alignment and secure mounting to prevent damage from vibration or movement during vehicle operation.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The TH121 throttle position sensor undergoes rigorous quality control testing to maintain consistent functionality. Please refer to Standard Ignition’s warranty policy for specific coverage details.

BrandStandard Ignition
Part NumberTH121
Connector GenderFemale; female
Connector Quantity2
Connector TypePlug in
Terminal GenderMale
Terminal Quantity6
Terminal TypeBlade terminals

This part fits 12 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersPositionNotes
1995NissanPathfinderAutomatic3.0LV6N/A
1995NissanPickupAutomatic3.0LV6N/A
1994NissanD21Automatic3.0LV6N/A
1994NissanPathfinderAutomatic3.0LV6N/A
1993NissanD21Automatic3.0LV6N/A
1993NissanPathfinderAutomatic3.0LV6N/A
1992NissanD21Automatic3.0LV6N/A
1992NissanPathfinderAutomatic3.0LV6N/A
1991NissanD21Automatic3.0LV6N/A
1991NissanPathfinderAutomatic3.0LV6N/A
1990NissanD21Automatic3.0LV6N/A
1990NissanPathfinderAutomatic3.0LV6N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

2-192642262071L019908EC3076TH121TPS478

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.