Description
Keep your vehicle’s engine management and exhaust emissions systems operating efficiently with the OX867 Oxygen Sensor, listed for the Hyundai i30 SX and Trophy FD DB51E, covering the 2007–2012 model years with a 2.0-litre inline-four, 16-valve engine. An oxygen sensor is an important component of a modern engine management system because it measures the oxygen content in the exhaust gases and sends information to the engine control unit (ECU).
Using this information, the ECU can adjust the air-fuel mixture to help the engine operate efficiently under different driving conditions. A correctly functioning oxygen sensor supports smooth engine operation, appropriate fuel control and emissions management. If your original sensor has become worn, contaminated or faulty, replacing it with a compatible unit may help restore accurate exhaust feedback.
The OX867 is intended for customers looking for an oxygen sensor replacement for a compatible Hyundai i30 application. Before ordering, confirm the exact vehicle configuration and sensor position to ensure the replacement matches the original component.
Product Specifications
- Product name: Oxygen Sensor
- Product code: OX867
- Vehicle make: Hyundai
- Vehicle model: i30 SX – Trophy
- Model series: FD
- Vehicle code listed: DB51E
- Model years listed: 2007–2012
- Engine capacity listed: 2.0 litres
- Engine configuration listed: Inline-four (I4)
- Valve configuration listed: 16 valves
- Body style listed: 4-door
- Part category: Engine management and exhaust emissions component
- Primary function: Measures oxygen content in exhaust gases for engine management feedback
Important: These details are based on the supplied product listing. Compatibility may vary according to the production date, engine code, market specification and original equipment. Always compare the replacement with the existing sensor before purchasing.
What Does an Oxygen Sensor Do?
An oxygen sensor, sometimes called an O2 sensor or lambda sensor, monitors the amount of oxygen remaining in the exhaust gases. The ECU uses this information to assess combustion and adjust fuel delivery when the vehicle’s control system supports closed-loop operation.
Maintaining an appropriate air-fuel mixture is important for engine performance, emissions control and fuel consumption. When the sensor provides inaccurate readings, the ECU may receive misleading information and make unsuitable adjustments.
Depending on the vehicle’s exhaust configuration, an engine may use more than one oxygen sensor. An upstream sensor is generally positioned before the catalytic converter and helps the ECU regulate the air-fuel mixture. A downstream sensor is generally located after the catalytic converter and helps monitor catalytic converter performance.
These sensors may differ in design, wiring, connector shape and function. For this reason, selecting the correct sensor position is essential when purchasing a replacement for your Hyundai i30.
Key Features and Benefits
- Engine management feedback: Provides oxygen-content readings to the vehicle’s engine management system when correctly installed and compatible.
- Supports air-fuel control: Helps the ECU make appropriate fuel mixture adjustments during normal operating conditions.
- Emissions system support: Contributes to the operation of the vehicle’s emissions control system.
- Potential drivability improvement: Replacing a confirmed faulty sensor may help address related hesitation, rough running or mixture-control problems.
- Potential fuel-efficiency benefits: Restoring accurate sensor feedback may help avoid unnecessary fuel consumption caused by incorrect mixture control.
- Replacement option: Offers a potential replacement solution when the existing sensor is confirmed to be faulty or damaged.
- Vehicle-specific listing: Catalogued for the Hyundai i30 SX/Trophy FD DB51E 2.0L I4 16V application described above.
Actual performance depends on the sensor’s specifications, the condition of the engine and exhaust system, and correct installation. Replacing an oxygen sensor will not resolve problems caused by unrelated faults.
Signs of a Faulty Oxygen Sensor
An oxygen sensor can deteriorate over time because it is exposed to high exhaust temperatures, combustion by-products and environmental contamination. Common symptoms associated with a faulty sensor may include:
- Illuminated check-engine light: The ECU may store a diagnostic trouble code related to oxygen-sensor performance or air-fuel mixture control.
- Increased fuel consumption: Incorrect readings can contribute to unsuitable fuel mixture adjustments.
- Rough idle: The engine may idle unevenly if the sensor fault affects mixture control.
- Hesitation during acceleration: In some cases, inaccurate feedback may contribute to inconsistent engine response.
- Unusual exhaust emissions: A sensor-related mixture problem may increase emissions.
- Failed emissions inspection: A sensor fault or related engine problem may prevent the vehicle from meeting applicable emissions requirements.
- Stored diagnostic codes: A scan tool may identify a circuit, heater, response or mixture-related code.
These symptoms do not automatically mean the oxygen sensor has failed. Vacuum leaks, damaged wiring, exhaust leaks, ignition faults, fuel delivery problems and catalytic converter issues can produce similar symptoms. A proper diagnosis is recommended before replacing parts.
Why Choose the Correct Replacement?
Selecting the correct oxygen sensor helps ensure that its electrical characteristics, connector and response are appropriate for the vehicle’s engine management system. A sensor that looks similar to the original may still have a different connector, wiring arrangement or operating specification.
For the Hyundai i30 FD listed here, check whether the required component is the upstream or downstream sensor. Compare the original part number, connector, wire count, mounting thread and overall design wherever possible. Also verify the engine code and production date, as specifications can differ between markets and model variants.
Do not rely on the model name and year alone if the vehicle has previously undergone engine, exhaust or emissions-system modifications.
Installation Recommendations
Oxygen sensors are fitted in the exhaust system, where components can become extremely hot. Allow the exhaust to cool completely before beginning any work. If you are unfamiliar with automotive electrical systems or exhaust components, professional installation is recommended.
General installation considerations include:
- Confirm the fault using a suitable diagnostic scan tool.
- Identify the correct sensor location and compare the replacement with the original unit.
- Inspect the wiring harness and electrical connector for corrosion, heat damage or broken wires.
- Remove the old sensor using an appropriate tool without damaging the exhaust threads.
- Install the replacement according to the vehicle manufacturer’s service instructions and specified tightening torque.
- Route the wiring away from hot exhaust surfaces and moving components.
- Clear diagnostic codes if appropriate, then perform the recommended checks and road test.
Use thread lubricant or anti-seize compound only when permitted by the sensor manufacturer; some replacement sensors are supplied with a prepared thread coating. Avoid contaminating the sensing element. Never work beneath a vehicle supported only by a jack.
Fitment and Buyer Information
The OX867 listing identifies the following intended application: Hyundai i30 SX-Trophy FD DB51E, 2007–2012, four-door, 2.0-litre I4, 16-valve engine.
Before purchasing, please verify:
- Vehicle year and exact model variant.
- Engine code and fuel type.
- Original oxygen sensor part number.
- Upstream or downstream installation position.
- Connector shape, wire count and sensor design.
- Compatibility with the vehicle’s emissions equipment and market specification.
The supplied application details should be treated as a fitment guide rather than a guarantee for every Hyundai i30 produced during these years. If you are uncertain, compare the original component or confirm compatibility with a qualified parts specialist.
Conclusion
The OX867 Oxygen Sensor is listed as a replacement option for the Hyundai i30 SX-Trophy FD DB51E 2007–2012 with a 2.0-litre, 16-valve inline-four engine. As part of the engine management and emissions control system, a correctly specified oxygen sensor helps provide the ECU with information needed for air-fuel mixture control and exhaust monitoring.
If your original sensor has been diagnosed as faulty, choosing the correct replacement may help restore proper sensor feedback and address related warning lights or drivability concerns. Confirm the sensor position, original part number, connector and exact vehicle specifications before ordering to help ensure a suitable fit.






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