QIJIAUTO O2 Oxygen Sensor for Ford Focus/Fusion & Lincoln MKC — Upstream or Downstream, Heated 4/5-Wire (460/720mm)

The QIJIAUTO O2 oxygen sensor is a direct-fit upstream and downstream replacement engineered to restore accurate exhaust oxygen readings for specified Ford and Lincoln models.

This heated oxygen sensor comes in vehicle-matching configurations for upstream (pre-cat) and downstream (post-cat) positions, offering a corrosion-resistant design and correct connector/wire lengths to simplify installation. It addresses common symptoms related to an aging sensor—such as poor fuel trim, check-engine lights, rough idle, and reduced fuel economy—by returning the exhaust monitoring system to factory-like operation when installed on compatible vehicles.

Which vehicles and sensor positions does this QIJIAUTO unit fit?

The sensor is made to fit specific model years and positions to guarantee plug-and-play compatibility. Confirm the part picture and connector type match your existing sensor before ordering to ensure the right fit for your vehicle.

• Compatible models: Ford Focus (2012–2014), Ford Fusion (2013–2014), Lincoln MKC (2015)
• Available placements: Upstream (front/upper) and downstream (rear/post-cat)
• Wire options: 4-wire and 5-wire harnesses with 460mm or 720mm lengths
• Mounting: threaded sensor body sized to original equipment

How will replacing the oxygen sensor affect vehicle performance?

A properly functioning oxygen sensor helps the engine control unit maintain the correct air–fuel ratio. Installing a new QIJIAUTO sensor can reduce erratic idling and improve throttle response by delivering reliable oxygen readings to the ECU.

• Improves fuel-trim accuracy to reduce wasted fuel
• Helps clear fault codes related to oxygen sensor readings
• Smoother acceleration and fewer hesitation events
• Stainless and silver-alloy joints help resist contamination and heat

What are the technical features and build details of this sensor?

This is a heated oxygen sensor built with a protective outer layer and silver-alloy melt-joint to resist poisoning and mechanical stress. It matches OEM dimensions and connector genders to make replacement straightforward and durable under normal driving conditions.

• Sensor type: heated O2 sensor for faster warm-up and stable readings
• Connector gender: available in both male and female configurations
• Wire harness lengths: 720 mm and 460 mm options to suit routing needs
• Wire counts: choose between 4-wire and 5-wire versions depending on vehicle wiring

How should I confirm fitment and install the replacement sensor?

Always compare the new part’s connector, thread size, and wiring configuration with the sensor currently on your vehicle. Basic mechanical skill and common hand tools are typically sufficient for replacement; use anti-seize on the threads and follow torque specs to avoid damage.

• Verify part image against your sensor before purchase
• Check connector shape and wire count for exact match
• Use appropriate socket and torque—avoid overtightening
• Clear related codes after installation and recheck for leaks or errors

Who is this for: The QIJIAUTO O2 oxygen sensor is intended for DIY mechanics, independent shops, and owners of the specified Ford and Lincoln models who need a direct-fit heated sensor to restore proper exhaust monitoring. If your vehicle shows an oxygen-sensor-related code, experiences rough running, or has declining fuel economy, this replacement sensor provides an OEM-like option with protective construction and correct wiring options. Remember to confirm compatibility by matching the connector, wire count, and mounting style to your original sensor before ordering to ensure a trouble-free fit.