HomeBelts and Cooling > Sending UnitsStandard Ignition TS-321 Engine Coolant Temperature Sender
Part #: TS-321

Standard Ignition TS-321 Engine Coolant Temperature Sender

44 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 and Mercury, Quest, Frontier, Tsuru, Xterra, and Villager
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Reliable Engine Coolant Temperature Sender for Mercury and Nissan Vehicles

The Standard Ignition TS-321 Engine Coolant Temperature Sender is designed to provide accurate temperature readings for your vehicle's cooling system. Compatible with select Mercury and Nissan models, this sender ensures your engine temperature is monitored effectively to maintain optimal performance.

  • Bolt-on attachment method for secure installation
  • Single male spade connector with plug-in design
  • Thread size M12-1.25 for precise fitment
  • One male blade terminal for reliable electrical connection
  • Compatible with Mercury Frontier and Nissan Frontier, Quest, Villager, and Xterra models

Product Details and Specifications

The TS-321 Engine Coolant Temperature Sender from Standard Ignition features a bolt-on attachment method, allowing for straightforward installation without the need for additional mounting brackets. It includes one male spade connector designed for plug-in use, ensuring a secure and stable electrical connection. The sender uses a single male blade terminal and has a thread size of M12-1.25, which matches OEM specifications for the supported vehicle models. This part is engineered to provide consistent and accurate temperature readings, essential for engine management and preventing overheating.

Compatible Vehicles and Applications

This temperature sender is compatible with several Mercury and Nissan vehicles, including the Mercury Frontier and Nissan Frontier, Quest, Villager, and Xterra. It is specifically designed to replace the original engine coolant temperature sender in these models, ensuring proper fit and function.

  • Monitors engine coolant temperature to prevent overheating
  • Helps maintain efficient engine performance
  • Prevents inaccurate temperature gauge readings
  • Supports proper operation of cooling fans and engine control systems
  • Reduces risk of engine damage due to temperature sensor failure

Installation Notes and Tips

Installation of the Standard Ignition TS-321 is straightforward due to its bolt-on design and standard thread size. Ensure the engine is cool before removal of the old sender to avoid injury. Use appropriate tools to avoid damaging the thread or connector. Verify the connector type matches your vehicle’s wiring harness for a proper plug-in connection. No mounting brackets are included, but the bolt-on method secures the sender firmly in place.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The TS-321 Engine Coolant Temperature Sender undergoes quality control testing to ensure accurate temperature readings and long service life. Please refer to Standard Ignition’s warranty policy for specific coverage details.

BrandStandard Ignition
Part NumberTS-321
Attachment MethodBolt On
Connector GenderMale
Connector ShapeSpade
Connector TypePlug In
Terminal GenderMale
Terminal TypeBlade
Thread SizeM12-1.25

This part fits 44 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2007NissanQuestN/AFits engines with gauges.
2006NissanQuestN/AFits engines with gauges.
2005NissanQuestN/AFits engines with gauges.
2004NissanFrontier3.3LV6N/AFits engines with gauges.
2004NissanQuestN/AFits engines with gauges.
2004NissanXterraN/AFits engines with gauges.
2003NissanFrontier3.3LV6N/AFits engines with gauges.
2003NissanXterra3.3LV6N/AFits engines with gauges.
2002MercuryVillagerN/AFits engines with gauges.
2002MercuryVillager3.3LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
2002NissanFrontier3.3LV6N/AFits engines with gauges.
2002NissanQuestN/AFits engines with gauges.
2002NissanXterra3.3LV6N/AFits engines with gauges.
2001MercuryVillagerN/AFits engines with gauges.
2001MercuryVillager3.3LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
2001NissanFrontier3.3LV6N/AFits engines with gauges.
2001NissanQuestN/AFits engines with gauges.
2001NissanXterra3.3LV6N/AFits engines with gauges.
2000MercuryVillagerN/AFits engines with gauges.
2000MercuryVillager3.3LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
2000NissanFrontier3.3LV6N/AFits engines with gauges.
2000NissanQuestN/AFits engines with gauges.
2000NissanXterra3.3LV6N/AFits engines with gauges.
1999MercuryVillagerN/AFits engines with gauges.
1999MercuryVillager3.3LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1999NissanQuestN/AFits engines with gauges.
1998MercuryVillagerN/AFits engines with gauges.
1998MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1998NissanQuestN/AFits engines with gauges.
1997MercuryVillagerN/AFits engines with gauges.
1997MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1997NissanQuestN/AFits engines with gauges.
1996MercuryVillagerN/AFits engines with gauges.
1996MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1996NissanQuestN/AFits engines with gauges.
1995MercuryVillagerN/AFits engines with gauges.
1995MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1995NissanQuestN/AFits engines with gauges.
1994MercuryVillagerN/AFits engines with gauges.
1994MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1994NissanQuestN/AFits engines with gauges.
1993MercuryVillagerN/AFits engines with gauges.
1993MercuryVillager3.0LV6N/ACompatible with vehicles equipped with a coolant temperature indicator light on the dashboard.
1993NissanQuestN/AFits engines with gauges.

* 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:

17-1412190211801T1143250800B000379624X-200272-465683006F3XA10884CASU4116SWE2375TS321TTS6699TS6699SBTW191WT668WTC1096

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