Oxygen Sensor Lambda 4-Wire Air-Fuel Ratio Sensor for Ford C-Max Fiesta Focus Volvo C30/S40/V50
Main description
Meet the Ford C-Max Oxygen Sensor Lambda 4-Wire Air-Fuel Ratio Sensor from WEIDA AUTO PARTS. This direct-fit sensor is designed to match the OEM reference 3M51-9F472-AC, ensuring compatibility with Ford C-Max, Fiesta, Focus, and Volvo C30/S40/V50 models. Its 4-wire heated design accelerates warm-up, delivering stable, accurate oxygen readings from the moment you start the engine. By helping the engine control unit precisely balance the air and fuel mixture, this sensor supports smoother idling, quicker throttle response, and reduced emissions. A reliable replacement that maintains engine efficiency without guesswork, built for durability in challenging driving conditions. Origin: Mainland China.
With the Ford C-Max Oxygen Sensor Lambda 4-Wire, you’ll experience a more consistent fuel mixture, cleaner exhaust, and improved overall drivability—especially during cold starts and city driving where sensor accuracy matters most. This sensor is engineered to slot right into your existing system, making maintenance simpler and keeping your vehicle performing at its best.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Since 2002, intercyprus.com has stood for reliability and quality in automotive parts, giving you peace of mind with every purchase.
Benefits & Tips
- Fast response after startup: the 4-wire heated design reaches operating temperature quickly, delivering reliable readings sooner for optimal fuel trimming.
- Better fuel economy and lower emissions: accurate oxygen readings help the engine run closer to the ideal air-fuel ratio across driving conditions.
- Easy, direct-fit replacement: matches the OEM specification (3M51-9F472-AC) for Ford C-Max, Fiesta, Focus, and Volvo C30/S40/V50—minimizing installation guesswork.
Product specifications
- Brand: WEIDA AUTO PARTS
- OEM No.: 3M51-9F472-AC
- Sensor Type: Piezoelectric
- Wires: 4-wire heated configuration
- Measuring Range: for Ford C-Max, Fiesta, Focus, Volvo C30, S40, V50 (OEM 3M51-9F472-AC)
- Origin: Mainland China
- Resolution: Oxygen Sensor
Package includes:
- 1 x Oxygen Sensor Lambda 4-Wire Air-Fuel Ratio Sensor (OEM 3M51-9F472-AC) for Ford C-Max, Fiesta, Focus, Volvo C30/S40/V50
Warnings/Reminders
- Compatibility confirmation: ensure this sensor matches your vehicle models and OEM number (3M51-9F472-AC) before installation.
- Handle with care: avoid touching the sensing element and keep the connector clean and dry during replacement.
- Installation cautions: disconnect the battery and follow your vehicle’s service manual for proper torque and sealing to prevent exhaust leaks.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Since 2002, intercyprus.com has stood for reliability and quality in automotive parts, giving you peace of mind with every purchase.