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GY6 169cc 170cc EFI 2 Pin O2 Oxygen Sensor for Jonway GTX 250
GY6 169cc 170cc EFI 2 Pin O2 Oxygen Sensor for Jonway GTX 250
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Product Overview
Restore accurate air-fuel ratio feedback with this 2 pin oxygen sensor, designed for selected GY6 169cc / 170cc EFI engines and compatible Jonway GTX 250 EFI / 200 EFI scooter applications.
This replacement O2 sensor helps monitor oxygen concentration in the exhaust system and sends air-fuel ratio data to the EFI system. A properly working oxygen sensor helps the engine adjust fuel delivery more accurately, supporting better combustion efficiency, smoother running, and more stable EFI performance.
Built with high-quality materials, this sensor is designed to withstand the high-temperature and high-pressure operating environment of the engine exhaust system. It is a practical replacement for an old, damaged, or inaccurate oxygen sensor.
Product Compatibility
| Brand / Platform | Model | Engine / HP / CC | Year Range | Notes |
|---|---|---|---|---|
| GY6 EFI Platform | EFI Scooter / Moped | 169cc / 170cc | Please verify | Match by 2-pin connector, 12mm thread, and wire length |
| Jonway | GTX 250 EFI | 250-class EFI | Please verify | Verify connector style and original sensor before purchase |
| Jonway | EFI 200 / GTX 200 EFI | 200-class EFI | Please verify | Verify connector style and original sensor before purchase |
| Chinese Scooter Platform | EFI Scooter / Moped | 169cc / 170cc / 200cc | Please verify | Match by thread diameter, plug style, and original sensor layout |
OEM Cross Reference:
No verified universal OEM number is available for this listing. Please match by 2-pin connector, 12mm thread diameter, 325mm wire length, and original sensor appearance.
Specifications
| Specification | Details |
|---|---|
| Part Type | O2 Oxygen Sensor / Lambda Sensor |
| Connector Type | 2 Pin |
| Thread Diameter | 12 mm / 0.47" |
| Wire Length | 325 mm / 12.8" |
| Application Type | EFI engine oxygen sensor |
| Compatible Engine Type | GY6 EFI 169cc / 170cc / selected 200cc applications |
| Function | Oxygen concentration monitoring / air-fuel ratio feedback |
| Fitment Method | Match by connector style, thread size, wire length, and original part layout |
| Condition | 100% New Aftermarket |
Key Features
- 2 Pin EFI Sensor Design – Built for selected GY6 EFI scooter applications
- 12mm Thread Size – Designed for exhaust systems using a matching 12mm oxygen sensor port
- 325mm Wire Length – Suitable for correctly matched EFI wiring layouts
- Accurate Oxygen Monitoring – Helps provide air-fuel ratio feedback to the EFI system
- High-Temperature Resistance – Built for exhaust-side operating conditions
- Stable EFI Performance Support – Helps support cleaner combustion and smoother engine operation
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Fitment FAQ
Will this part fit my specific model and year?
This oxygen sensor is intended for Brand / Platform; Engine / HP / CC. Key physical/spec details from the product data include Match by 2-pin connector, 12mm thread, and wire length, 2 Pin, Thread Diameter: 12 mm / 0.47". Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. If your original part has a stamped OEM or manufacturer number, match that number first before ordering. For this oxygen sensor, also compare the plug style, wire count, thread size, sensor length, heater circuit type, and ECU compatibility. This is especially important for GY6 GY6 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this oxygen sensor for machines outside the listed compatibility, or for units with different wire counts, plugs, thread sizes, sensor lengths, or ECU heater-circuit requirements. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the plug style, wire count, thread size, sensor length, heater circuit type, and ECU compatibility. Recheck listed specs such as Match by 2-pin connector, 12mm thread, and wire length, 2 Pin, Thread Diameter: 12 mm / 0.47". If any connector, mounting point, size, or year detail is different, confirm fitment before installation.