HomeEmission Control > SensorsStandard Ignition TH186 Throttle Position Sensor
Part #: TH186

Standard Ignition TH186 Throttle Position Sensor

40 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$76.92Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Nissan, Mercury, and INFINITI, Frontier, Pickup, Xterra, Villager, Quest, G20, Sentra, 200SX, J30, 300ZX, and D21
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Throttle Position Sensor for Infiniti, Nissan, and Mercury Vehicles

The Standard Ignition TH186 throttle position sensor is designed to provide accurate throttle position readings for a range of Infiniti, Nissan, and Mercury models. This sensor helps maintain optimal engine performance and fuel efficiency by delivering precise data to the vehicle’s engine control unit.

Key Features of the Standard Ignition TH186 Throttle Position Sensor

  • Compatible with Infiniti 200SX, 300ZX, J30, G20, and Villager models
  • Fits Nissan D21, Frontier, Pickup, Quest, Sentra, and Xterra vehicles
  • Also suitable for Mercury models including Pickup and Villager
  • Direct replacement part number TH186 for easy identification
  • Ensures accurate throttle position feedback for improved engine response

Detailed Description of the TH186 Throttle Position Sensor

The Standard Ignition TH186 throttle position sensor is engineered to meet or exceed OEM specifications for emission control sensors. It monitors the position of the throttle valve and sends this information to the engine control module, which adjusts fuel injection and ignition timing accordingly. This sensor is critical for maintaining smooth acceleration, reducing emissions, and optimizing fuel economy in compatible Infiniti, Nissan, and Mercury vehicles.

Common Issues Addressed by the TH186 Sensor

  • Erratic or unstable engine idle
  • Poor throttle response or hesitation during acceleration
  • Check engine light triggered by throttle position sensor faults
  • Reduced fuel efficiency due to inaccurate throttle data
  • Engine stalling or surging at low speeds

Installation Notes and Tips for the TH186 Sensor

  • Ensure the ignition is off before beginning installation
  • Disconnect the battery to prevent electrical shorts
  • Locate the existing throttle position sensor on the throttle body
  • Remove mounting screws and unplug the electrical connector carefully
  • Install the new TH186 sensor, secure mounting screws, and reconnect the electrical plug
  • Clear any diagnostic trouble codes after installation using an OBD-II scanner

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and reliable performance. The TH186 throttle position sensor comes with a limited warranty against defects in materials and workmanship, providing confidence in its long-term operation within compatible Infiniti, Nissan, and Mercury vehicles.

BrandStandard Ignition
Part NumberTH186
Connector GenderFemale; Female
Connector TypePlug In
Terminal GenderMale; Male
Terminal TypeBlade Terminals

This part fits 40 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersPositionNotes
2005NissanFrontier2.5LL4N/A
2004NissanFrontier2.4LL4N/A
2004NissanPickupN/A
2004NissanXterra2.4LL4N/A
2003NissanFrontier2.4LL4N/A
2003NissanPickupN/A
2003NissanXterra2.4LL4N/A
2002MercuryVillagerN/A
2002NissanFrontier2.4LL4N/A
2002NissanPickupN/A
2002NissanQuest3.3LV6N/A
2002NissanXterra2.4LL4N/A
2001MercuryVillagerN/A
2001NissanFrontier2.4LL4N/A
2001NissanQuest3.3LV6N/A
2001NissanXterra2.4LL4N/A
2000MercuryVillagerN/A
2000NissanFrontier2.4LL4N/A
2000NissanQuest3.3LV6N/A
2000NissanXterra2.4LL4N/A
1999INFINITIG20N/A
1999MercuryVillagerN/A
1999NissanFrontier2.4LL4N/A
1999NissanQuest3.3LV6N/A
1999NissanSentraAutomatic2.0LL4N/A
1998MercuryVillagerN/A
1998Nissan200SXAutomatic2.0LL4N/A
1998NissanFrontier2.4LL4N/A
1998NissanQuest3.0LV6N/A
1998NissanSentraAutomatic2.0LL4N/A
1997INFINITIJ30N/A
1997MercuryVillagerN/A
1997NissanQuest3.0LV6N/A
1996INFINITIJ30N/A
1996MercuryVillagerN/A
1996Nissan300ZX3.0LV6N/A
1996NissanPickup2.4LL4N/AFits vehicles equipped with California emissions.
1996NissanQuest3.0LV6N/A
1995NissanPickup2.4LL4N/AFits vehicles equipped with California emissions.
1994NissanD212.4LL4N/AFits vehicles equipped with California emissions.

* 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:

141-292158-06311F5Z9B989AA2-20175213-2692226200S3103-201755S516771-7668754459995EC3170ECC1086SS10318TH186TTPS0005TPS269

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