O2 Sensor Adapter Stainless Steel Oxygen Extension With Hex Base And Threaded Fitting For Exhaust System Modification
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Connect your oxygen sensor with a secure, corrosion-resistant fit
o2 sensor adapter is a durable, stainless steel extension designed to modify oxygen sensor fitment in exhaust systems. This oxygen sensor adapter features a threaded M18*1.5 connection and a hexagonal base for easy installation with standard tools. Constructed from high-quality SS304 stainless steel, it resists rust and corrosion, ensuring long-term reliability. The o2 sensor extension includes a filter mesh at the tip to protect internal components while maintaining accurate readings.

A customer favourite — This stainless steel O2 sensor adapter with a built-in mini catalytic converter effectively eliminates check engine lights after exhaust modifications.
Popular choice with fast dispatch — Ordered today, dispatched within 24–48 hours.
Why You’ll Love This O2 Sensor Adapter
- Built-in Mini Cat A miniature catalytic converter inside the adapter helps filter exhaust gases to prevent the check engine light from turning on after exhaust modifications.
- Corrosion-Resistant Build Constructed from SS304 stainless steel with a stainless steel filter mesh, this adapter resists rust for long-lasting performance in harsh under-vehicle conditions.
- Simple M18 Threading The M18*1.5 thread size screws directly into your exhaust system for a secure, no-hassle installation without special tools.
- Lightweight Design Weighing just 40 grams, the adapter adds minimal mass to your exhaust setup while providing reliable sensor fitment.
Perfect For
- Exhaust Modifications After installing a new exhaust system or deleting a catalytic converter, this adapter helps clear the check engine light.
- Sensor Fitment Issues Useful when an oxygen sensor threading needs to be extended or repositioned for a proper connection.

Specifications
- Product type: O2 sensor adapter
- Material: SS304 stainless steel and stainless steel filter mesh
- Thread size: M18 x 1.5
- Weight: 40 g
- Design: Integrated mini catalytic converter
What's in the Box
- 1 x Car O2 Sensor Adapter
Your o2 sensor adapter delivers a dependable fix for that persistent check engine light after exhaust modifications, thanks to its built-in mini catalytic converter and durable SS304 stainless steel construction. Simply screw the M18*1.5 threaded fitting into place for a straightforward installation that gets you back on the road without distractions. Install your adapter and drive with confidence today.
Free tracked shipping
Alegri offers free tracked shipping on every order. Once your order is on its way, you’ll receive a tracking number so you can follow its journey.
30-day returns
You can request a return within 30 days of receiving your order. Once approved, the refund is sent to your original payment method within 10 business days.