Vehicle Compatibility
Compatible with select:
Ford Focus
- 2012-2018 Ford Focus
Ford Fusion
- 2013-2014 Ford Fusion
Includes replacement sensors for:
- Upstream O2 sensor
- Downstream O2 sensor
Reference Part Numbers:
- 234-5068
- 234-4575
Always confirm engine size and connector style before ordering because Ford occasionally changes sensors mid-production just to keep parts catalogs humble.
Compatible Vehicles: Oxygen sensor fit for Ford Center of attention 2.0L L4 (Non Turbo) 2012-2018, for Ford Fusion 1.6l L4 Turbocharged 2013-2014
What Do Oxygen Sensors Do?
Oxygen sensors monitor the oxygen content in the exhaust stream and send real-time data to the ECU for fuel adjustment.
Upstream Sensor
Controls:
- Air/fuel mixture
- Fuel trims
- Engine efficiency
- Combustion performance
Downstream Sensor
Monitors:
- Catalytic converter efficiency
- Emissions system performance
When either sensor fails, your ECU starts making fuel decisions like a sleep-deprived intern with a calculator.
OEM Numbers: 234-5068 Upstream and Downstream 234-4575, replacement numbers: DS7Z9F472A, BB5Z9G444A, CM5Z9G444A, CT4Z9G444A, CV6Z9G444A, CV6Z9G444B
Common Symptoms of Bad O2 Sensors
Failing oxygen sensors can cause:
- Check engine light
- Poor fuel economy
- Rough idle
- Hesitation during acceleration
- Increased emissions
- Failed smog inspection
- Sluggish performance
- Rich fuel smell
And occasionally the wonderful experience of replacing parts until the CEL finally gives up emotionally. Learn how to replace your Ford Fusion oxygen sensor using this DIY article.
Excellent Performance: Products made of high-quality materials don’t seem to be only durable, but also resistant to high temperatures and corrosion. The double laser-welded stainless steel body design effectively reduces the frequency of replacement and extends the overall service life of the product
Key Features
Complete Upstream & Downstream Set
Replacing both sensors together helps:
- Restore balanced fuel monitoring
- Improve emissions performance
- Reduce future sensor failures
- Simplify maintenance
OEM-Style Fitment
Designed for direct replacement installation on compatible Ford applications.
Durable Heated Sensor Design
Built to withstand:
- High exhaust temperatures
- Daily driving vibration
- Long-term heat cycling
- Harsh engine conditions
Which matters because modern engine bays operate at approximately “surface of the sun” temperatures.
Main Functions: Helps be sure that your engine is regularly monitored and operates efficiently, can appropriately detect the air-fuel mixture ratio, fortify fuel economy, reduce harmful emissions, and prevent premature failure of the catalytic converter
Attentions: Please be sure you again and again confirm the compatibility of your vehicle model with this product, especially the connector part. Please carefully check whether the original vehicle connector matches this product. Plug and play design, may also be right away replaced, easy to install
Benefits of Replacing Both O2 Sensors
Installing fresh oxygen sensors may help:
- Restore fuel economy
- Improve throttle response
- Eliminate hesitation
- Reduce emissions
- Clear O2-related fault codes
- Improve idle quality
And potentially stop your Focus from acting personally offended every time you accelerate onto the freeway.
Installation Notes
Typical installation steps:
- Disconnect battery
- Remove old sensors
- Install replacements
- Connect harnesses
- Clear ECU codes
An O2 sensor socket is highly recommended unless your preferred repair method includes stripped threads and emotional breakdowns.
Final Thoughts
This 2PCS Upstream & Downstream Oxygen Sensor Kit is a smart maintenance upgrade for Ford Focus and Fusion owners experiencing fuel economy loss, rough idle, or check engine lights.
Replacing both sensors at the same time helps restore proper ECU fuel management and emissions performance while reducing the likelihood of chasing future oxygen sensor codes one at a time.
Because nothing says “modern car ownership” quite like solving one CEL only for another sensor to immediately join the chat.
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