Standard Ignition TX78 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Nissan and INFINITI

Standard Ignition TX78 is an engine coolant temperature sensor built with a brass body, a square female connector, and a bolt-on attachment method. It uses a 2-blade male terminal layout and 12-volt electrical specification for direct replacement service on a wide range of Nissan and INFINITI applications.

Use this TX78 coolant temperature sensor when you need accurate coolant temperature input for engine management, gauge operation, and cooling-system control on vehicles such as the Nissan Frontier, Nissan Pathfinder, INFINITI G35, and INFINITI QX80.

• Brass sensor body for coolant-system service
• Bolt-on attachment method for secure mounting
• Square female connector with 2 male blade terminals
• 12-volt electrical specification
• Direct-fit replacement for many Nissan and INFINITI models

Fitment and application details

Fits 2024 Nissan Armada, N/A. Fits 2021-2022 Nissan Armada, N/A. Fits 2005-2015 Nissan Armada, N/A. Fits 2017-2022 INFINITI Q60, located on coolant crossover tube. Fits 2022 INFINITI QX55, located on water outlet. Fits 2020-2022 INFINITI QX80, located on water outlet. Fits 1998-2021 Nissan Frontier, N/A. Fits 2012-2021 Nissan NV1500, N/A. Fits 2020-2021 Nissan NV200, N/A. Fits 2013-2016 Nissan NV200, N/A. Fits 2012-2021 Nissan NV2500, N/A. Fits 2012-2021 Nissan NV3500, N/A. Fits 2019-2020 INFINITI Q50, radiator. Fits 2014-2019 INFINITI Q70, N/A. Fits 2014-2019 INFINITI QX80, N/A. Fits 2009-2019 Nissan GT-R, N/A. Fits 2002-2019 Nissan X-Trail, N/A. Fits 2014-2018 Nissan NV350 Urvan, N/A. Fits 2011-2017 Nissan Juke, located on water outlet. Fits 2017 Nissan Kicks, N/A. Fits 2015 INFINITI Q40, N/A. Fits 2014-2015 INFINITI Q50, N/A. Fits 2014-2015 INFINITI Q60, N/A. Fits 2015 INFINITI Q70L, N/A. Fits 2014-2015 INFINITI QX50, N/A. Fits 2014-2015 Nissan Note, N/A. Fits 2011-2015 Nissan Quest, N/A. Fits 2004-2009 Nissan Quest, N/A. Fits 1996-2002 Nissan Quest, N/A. Fits 2014-2015 Nissan Rogue Select, compatible with vehicles equipped with Federal Emissions. Fits 2004-2015 Nissan TITAN, N/A. Fits 2000-2015 Nissan Xterra, N/A. Fits 2014 INFINITI QX70, N/A. Fits 2009-2014 Nissan Cube, located on water outlet. Fits 2014 Nissan Murano, N/A. Fits 2003-2008 Nissan Murano, N/A. Fits 2014 Nissan Rogue Select, w/ Calif. Emissions; alternate number. Fits 2013 INFINITI EX37, N/A. Fits 2013 INFINITI FX37, N/A. Fits 2012-2013 INFINITI FX50, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2008-2013 INFINITI G37, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2012-2013 INFINITI M35h, N/A. Fits 2011-2013 INFINITI M37, N/A. Fits 2011-2013 INFINITI M56, N/A. Fits 2004-2013 INFINITI QX56, N/A. Fits 2009-2013 Nissan Murano, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2008-2013 Nissan Rogue, compatible with vehicles equipped with Federal Emissions. Fits 2008-2013 Nissan Rogue, w/ Calif. Emissions; alternate number. Fits 2009-2012 INFINITI EX35, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2008-2012 INFINITI FX35, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2011-2012 INFINITI G25, N/A. Fits 1996-2012 Nissan Pathfinder, N/A. Fits 2009-2012 Nissan Sentra, compatible with vehicles equipped with Federal Emissions. Fits 1995-2012 Nissan Sentra, N/A. Fits 2007-2012 Nissan Versa, N/A. Fits 2009-2012 Suzuki Equator, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2011 INFINITI FX50, located on cylinder head; alternate number. Fits 2009-2010 INFINITI FX50, located on cylinder head. Fits 2010 INFINITI FX50, on side of block; alternate number. Fits 2009-2010 INFINITI M35, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2006-2010 INFINITI M45, N/A. Fits 2003-2004 INFINITI M45, N/A. Fits 1996-2010 Nissan Pickup, N/A. Fits 2009 INFINITI FX50, on engine; alternate number. Fits 2007-2009 Nissan 350Z, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2008 INFINITI EX35, incl. O-ring; alternate number. Fits 2003-2008 INFINITI FX45, N/A. Fits 2007-2008 INFINITI G35, prior to purchase, ensure compatibility with vehicle's alternator for proper fit. Fits 2006-2008 INFINITI M35, N/A. Fits 1995-2008 Nissan Maxima, N/A. Fits 2003-2007 INFINITI FX35, N/A. Fits 2003-2006 INFINITI G35, N/A. Fits 1994-2006 INFINITI Q45, N/A. Fits 2003-2006 Nissan 350Z, N/A. Fits 1995-2006 Nissan Altima, N/A. Fits 2002-2004 INFINITI I35, N/A. Fits 2004 Nissan Pathfinder Armada, N/A. Fits 1997-2003 INFINITI QX4, N/A. Fits 1999-2002 INFINITI G20, N/A. Fits 1996 INFINITI G20, N/A. Fits 1996-2002 Mercury Villager, N/A. Fits 1996-2001 INFINITI I30, N/A. Fits 1995-1998 Nissan 200SX, N/A. Fits 1996-1998 Nissan 240SX, N/A. Fits 1996-1997 INFINITI J30, N/A. Fits 1996 Nissan 300ZX, N/A.

Common symptoms this sensor can address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough cold operation caused by inaccurate temperature input
• Cooling fan or engine management concerns tied to coolant temperature signal loss
• Check engine light conditions related to coolant temperature sensor faults
• Intermittent drivability issues on Nissan Frontier, Pathfinder, and INFINITI applications

Installation notes and quality assurance

Confirm connector shape, terminal style, and mounting location before installation, especially on applications noted at the water outlet, radiator, coolant crossover tube, cylinder head, or side of block. This part cross-references Anchor 9339 for the same application. Standard Ignition TX78 also cross-references T Series TX78T.

Standard Ignition supplies this engine coolant temperature sensor as a replacement part for service on the listed Nissan, INFINITI, and select Mercury and Suzuki applications. Verify the vehicle year, make, model, emissions configuration, and sensor location before ordering.