Lambda sensor O2 sensor EFI Euro4 & Euro5 (Rongmao GY6)
Looking for a reliable lambda sensor for your scooter? This 4-pin O2 sensor is specially designed for Euro4 and Euro5 scooters with a Rongmao EFI (injection) system.
The lambda sensor measures the oxygen content in the exhaust gases and ensures that the ECU can regulate the correct fuel-air ratio. This is essential for optimal performance and a fuel-efficient engine.
Suitable for Rongmao EFI systems (GY6 scooters)
This sensor is suitable for various Chinese scooters with an injection system, including:
- Senzo
- The mouse
- TYM
- Riya
- Santini
- Fast
- Other GY6 Euro4 / Euro5 scooters
Why a properly functioning lambda sensor is important
The lambda sensor plays a crucial role within your scooter's injection system.
Benefits of a properly functioning sensor:
✔ Better engine performance
✔ Smoother ride
✔ Lower fuel consumption
✔ Lower emissions (Euro4 / Euro5)
✔ Longer motor lifespan
4-pin connection (plug & play)
This lambda sensor is equipped with a 4-pin connector, allowing for quick and easy installation without modifications.
Recognize a faulty lambda sensor
Are you unsure if your lambda sensor is broken? Look out for these symptoms:
- Poor or irregular running of the engine
- Higher fuel consumption
- Loss of power
- Difficult to start
- Malfunctions in the injection system
Advantages of this Rongmao lambda sensor
✔ Suitable for Euro4 & Euro5 scooters
✔ Works with Rongmao EFI system
✔ 4-pin connection
✔ Accurate measurements
✔ Improves performance and consumption
✔ Easy installation (plug & play)
Specifications
- Product: Rongmao Lambda sensor / O2 sensor
- Type: 4-pin
- Suitable for: GY6 scooters
- System: Rongmao EFI (injection)
- Standard: Euro4 & Euro5
- Condition: New
Why choose this lambda probe?
With this Rongmao lambda sensor, you ensure that your scooter performs optimally again, runs economically, and meets emission requirements. An essential component for every modern injection scooter.

It does its work
Ordered online! Great
Fast, good and affordable
Had engine failure, engine light went out when I connected the new one