Koso Oxygen Sensor Plug - Harley & Indian V-Twin
About Koso
Koso builds instrumentation, gauges, heated grips and electronic accessories for motorcycles, with digital displays used widely in the custom V-twin scene.
When you're upgrading your V-twin exhaust or tuning your engine, an active oxygen sensor might not be part of the plan. This Koso Oxygen Sensor Plug is purpose-built to seal off the O2 sensor port when the sensor is removed or bypassed. It's an essential component for maintaining exhaust system integrity and preventing unwanted error codes.
Why riders pick this
- Seals O2 sensor ports after removal or bypass
- Prevents exhaust leaks and maintains system integrity
- Helps avoid triggering error codes
- Lightweight aluminum construction
- Fits standard V-twin O2 sensor ports
Removing or bypassing an oxygen sensor is a common step for performance V-twin builds, especially when installing aftermarket exhaust systems or custom engine tunes. This Koso plug ensures that the now-vacant O2 sensor port is properly sealed, preventing exhaust leaks that can compromise engine performance and trigger fault codes. Its straightforward design makes it a simple solution for a critical task, helping you maintain a clean and efficient exhaust setup.
Secure Your Exhaust System
- Designed to seal standard V-twin O2 sensor ports
- Lightweight aluminum construction for durability
- Prevents exhaust leaks after sensor removal
- Helps avoid error codes associated with missing O2 sensors
Seamless Integration for Your Build
This oxygen sensor plug is a small but mighty component in any V-twin customization. It's particularly useful when you're running open exhaust systems or have moved to a closed-loop tuning strategy that no longer relies on O2 sensor input. Ensure your exhaust remains sealed and your engine management system runs smoothly without unnecessary fault warnings. Confirm your bike uses a standard O2 sensor port for a perfect fit.
Specifications
- Brand: Koso
- Manufacturer Part #: BG001801
- Material: Aluminum
- Length: 2.75 in
- Width: 4.25 in
- Height: 0.55 in
- Weight: 0.05 lbs
- Country of Origin: Canada
Common questions
Will this plug eliminate my check engine light after O2 sensor removal?
This plug seals the port to prevent exhaust leaks, but some bikes may still throw a code. A tuner or fuel controller is often needed to clear the error permanently on bikes without an active oxygen sensor.
Does this fit all V-twin motorcycles?
It fits standard V-twin O2 sensor ports. Verify your bike uses a standard port before ordering, as some custom or older V-twins may differ. Please confirm fitment with Shop by Bike.
Is this difficult to install?
Installation is typically straightforward, requiring basic hand tools to thread the plug into the existing O2 sensor port. No special modifications are usually needed.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Koso |
| TYPE | Hardware/Fasteners/Fittings |
| SKU | 27-5728 |
| WEIGHT | 0.05 lb |
