HTMXJA Oxygen O2 Sensor 4-Piece Kit for Ford & Mazda V6 (3.0L–3.7L) – Upstream & Downstream, Direct-Fit Replacement

This complete four-sensor kit from HTMXJA is engineered as a direct-fit replacement for a wide range of Ford, Lincoln, Mercury and Mazda models with 3.0L–3.7L engines from model years 2010–2016. Each sensor follows OEM dimensions so installation requires no modification and plugs into factory harnesses. The set includes both upstream (pre-catalyst) and downstream (post-catalyst) sensors to give you full control of the engine control module's (ECM) oxygen feedback loop after a failure or when restoring emissions readiness.

Which vehicles and engine combinations will accept these HTMXJA oxygen sensors?

These sensors are labeled to fit many Ford and Mazda V6 petrol engines across model years 2010–2016. Always verify your vehicle’s OE part number against 234-5038 or 234-4490 and check connector style before ordering to ensure correct fitment.

• Ford Edge 3.7L & 3.5L (2011–2014)
• Ford F-150 and Mustang 3.7L (2011–2014)
• Explorer 3.5L (2011–2015)
• Escape/Fusion/Mariner/Milan/CX-9/Tribute 3.0L–3.7L (2010–2015)
• Lincoln MKZ/MKS/MKX/MKT and Mercury models listed in spec

How do these sensors affect fuel economy and emissions monitoring?

Worn or failing oxygen sensors send incorrect voltage signals to the ECM, which can force the engine into an aggressive enrichment or lean strategy. Replacing faulty upstream and downstream sensors helps the ECM maintain the intended air-fuel ratio, improving combustion efficiency and helping the catalytic converter work as designed.

• Restores correct oxygen-voltage feedback for the ECM
• Helps return engine control to factory fuel trims
• Supports accurate downstream catalyst monitoring and OBD readiness
• May reduce rough idle and fuel-wasting conditions

What are the build quality and warranty details for HTMXJA sensors?

HTMXJA sensors are manufactured from corrosion-resistant materials and designed to meet OEM fit, form and connector specifications for straightforward installation. The kit comes with a six-month warranty and is intended as a plug-and-play replacement for listed OE reference numbers.

• Durable sensing element and stainless housing
• Factory-style connector and wiring length for direct fit
• Six-month limited warranty included
• Sold as a four-piece set to cover upstream and downstream positions

How do I install and verify these oxygen sensors after replacement?

Installation is typically simple with common hand tools and a sensor socket; always allow the exhaust to cool before starting. After installation, clear any stored codes with an OBD-II scanner and perform a short test drive to confirm the ECU detects correct sensor operation and returns normal fuel trim values.

• Ensure vehicle is cool; disconnect the battery per procedure
• Use an oxygen sensor socket or crowfoot to avoid damage
• Clear codes and cycle the ignition to reset readiness monitors
• Verify no exhaust leaks at threads and check for CEL absence

Who is this for: This HTMXJA four-pack is suited for DIY mechanics, independent repair shops and fleet owners who need a cost-effective, direct-replacement oxygen sensor solution for 2010–2016 Ford, Lincoln, Mercury and Mazda V6 models. Choose this kit when OE part numbers 234-5038 or 234-4490 match your vehicle and you want plug-in compatibility with OEM-style connectors and durable materials for reliable emissions and fuel-trim feedback.