Product Description
Restore proper engine performance, smooth throttle response, and optimal air-fuel ratios with this high-precision 4-Wire Heated Oxygen (O2) Sensor. Designed for small-displacement powersports vehicles equipped with Delphi Electronic Fuel Injection (EFI) systems, this sensor measures exhaust oxygen levels to help your engine control unit (ECU) regulate fuel delivery efficiently.
Whether you are replacing a failed sensor on a factory adventure bike or building a custom fuel-injected pit bike, ATV, or motorcycle, this sensor delivers fast light-off times and accurate feedback for closed-loop EFI operation.
Key Features & Benefits:
- Delphi EFI Compatible: Standard 4-pin keyway connector designed to plug directly into Delphi powersports wiring harnesses.
- Rapid Operating Warm-Up: Features an integrated internal heating element (4-wire) for rapid sensor activation and accurate closed-loop fuel monitoring shortly after starting.
- Durable Construction: Built with a stainless steel body and protective perforated probe guard to withstand extreme exhaust temperatures and vibration.
- Pre-Greased Threads: Standard M12 thread comes equipped with a high-temperature sealing washer/gasket and protective thread shield for an airtight seal upon installation.
Technical Specifications:
- Sensor Type: Heated Oxygen (O2) / Lambda Sensor (Narrowband)
- Wire Count: 4 Wires (Power, Ground, Signal, Signal Ground)
- Connector Type: 4-Pin Sealed Delphi Male/Female Style Plug with Locking Tab
- Thread Size: M12 x 1.25 Pitch
- Harness Sleeve: High-Temperature Protective Loom Shield
Confirmed Fits & Applications:
This O2 sensor is a direct-fit component for many CSC Motorcycles models and Chinese powersports vehicles using Zongshen / Delphi EFI systems, including:
- CSC Motorcycles: RX3 Adventure (ZS250GY-3), RX4 Adventure (ZS450GY), SG400 Cafe Racer, RZ3S Haylon
- Engine Compatibility: Zongshen NC250 (177MM), NC450 (194MQ), TC250, and TC380 engine setups
- Broad Universal Powersports Fitment: Compatible with various 125cc, 250cc, 300cc, 400cc, and 450cc Motorcycles, Enduros, Dual-Sports, ATVs, UTVs, Scooters, and Go-Karts equipped with Delphi EFI systems and an M12x1.25 exhaust bung.
Note for Custom & Universal Applications: Please verify your original sensor's thread size (M12x1.25), wire count (4-wire), and connector plug shape against the detailed listing photos before purchasing to ensure proper fitment.
