Name: Exhaust Lambda O2 Oxygen Sensor Hyosung GV125S GV300S
SKU: 37950H99D02JS
Availability: InStock

Exhaust Lambda O2 Oxygen Sensor Hyosung GV125S GV300S

Estimated delivery dates: May 16, 2026 - May 18, 2026

£54.99

💎 EXHAUST OXYGEN O2 LAMBDA SENSOR | GV125S & GV300S

Ensure perfect fueling and a smooth commute. This critical sensor provides accurate data to your ECU, preventing rough idling, high fuel use, and engine warning lights. A necessary replacement to keep your modern Bobber running efficiently.

✅ Restore Efficiency: Ensures correct air-fuel mixture for smooth running.
🛠️ Direct Replacement: Matches OEM specs for the newest GV-S models.
⚙️ Reliability: Fixes common EFi performance issues.
📦 Note: Sold individually (x1)

💡 BUYER’S NOTE (GV125S/GV300S): Check your exhaust setup! Adjust your cart quantity to “2x” if you need a pair.

Description

The engine control unit (ECU) in your modern GV125S or GV300S relies entirely on the oxygen sensor to manage fuel delivery efficiently. As these sensors age, they become slow or fail completely, leading to frustrating performance issues. Replacing a faulty lambda sensor is the quickest way to restore your bike’s reliable performance, fuel economy, and smooth power delivery.

💎 Performance & Efficiency Restored

A vital component to keep your modern Hyosung running flawlessly on daily commutes and weekend rides.

Fixes Rough Idle Ensures stable fuel mapping at all speeds.	Improves MPG Correct fueling reduces wasted petrol.
Clears Warning Lights Fixes O2 sensor related diagnostic codes.	OEM Spec Connector Plug-and-play installation.

📜 Confirmed Fitment Guide

✅ FITS: Hyosung GV125S Bobber (2019+), Hyosung GV300S (2020+)
🔧 OEM REF: 37950H99D0x series
📦 QUANTITY NOTE: Sold as single unit. Order x2 if your exhaust system requires both front & rear sensors.

💡 INSTALLATION HACK:
An O2 sensor wrench makes this job easy. Ensure you apply anti-seize compound to the threads of the new sensor to make future replacements a breeze!

🔧 Fitting Tips

Anti-Seize: Crucial step—apply a thin layer to the threads to prevent the sensor from seizing in the exhaust pipe (a common issue).
Careful Removal: O2 sensors can be stubborn. If the old one is rusted solid, you may need a specific O2 sensor socket wrench.
Plug-and-Play: The connector is a direct match for the factory wiring harness.

📧 FITMENT QUESTIONS? Email us with your bike details. For technical help or community opinions, visit the HyoRiders Forums.