O2 Sensor Spacer Adapter | Mini Catalytic Converter M18x1.5

O2 Sensor Spacer Adapter with Built-In Mini Catalytic Converter

Keep your check engine light off and your vehicle running smoothly with this stainless steel O2 sensor spacer adapter. Featuring a built-in mini catalytic mesh (400 cell, Euro 3 spec), this adapter creates just enough distance between your downstream oxygen sensor and the exhaust stream to deliver accurate readings — no costly repairs or complicated modifications required.

Key Features

• Universal Fitment: Fits all standard oxygen sensors with M18 x 1.5 threaded O2 sensor ports.
• Straight Bolt-On Installation: No drilling, cutting, or welding needed — installs quickly and easily.
• Built-In Mini Catalytic Mesh: 400-cell Euro 3 mini catalyst inside helps manage exhaust readings for downstream sensors.
• Premium SS304 Stainless Steel: Corrosion-resistant and built to handle extreme exhaust temperatures without cracking or warping.
• Nickel-Plated Surface: Additional layer of protection against heat expansion and oxidation.
• Silver Finish: Clean, factory-looking appearance once installed.
• Lightweight: Weighs just 74g — no added stress on your exhaust system.

Specifications

• Material: Stainless Steel 304 (SS304)
• Thread Size: M18 x 1.5
• Internal Cell Structure: 400-cell mini catalytic mesh (Euro 3)
• Color: Silver
• Weight: 74g
• Packaging: OPP Bag
• Country of Origin: Made in China

What's in the Box

Choose from a 1-piece or 2-piece pack to suit your vehicle's configuration (upstream/downstream sensors).

Installation Tips

Simply thread the spacer adapter into your existing O2 sensor bung, then thread your oxygen sensor into the adapter. Use appropriate thread sealant tape if desired. No special tools are required beyond a standard O2 sensor socket.

For guidance on vehicle emissions and sensor standards, visit the U.S. EPA Vehicle Inspection & Maintenance Programs page.

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Frequently Asked Questions

Q: What thread size does this O2 sensor spacer adapter fit?

A: This adapter is designed for standard M18 x 1.5 threaded oxygen sensor bungs, which covers the vast majority of modern vehicles. Always verify your vehicle's O2 sensor thread size before ordering.

Q: Will this O2 sensor spacer adapter turn off my check engine light?

A: This spacer adapter is designed for downstream (post-catalytic converter) oxygen sensors. The built-in 400-cell mini catalytic mesh helps manage sensor readings, which can address check engine light codes triggered by downstream O2 sensor signals. Results may vary depending on your specific vehicle and fault code.

Q: Is the installation difficult or does it require special tools?

A: Installation is a straight bolt-on process — no cutting, welding, or modifications needed. A standard O2 sensor socket wrench is all you need. Most users complete the installation in under 15 minutes.

Q: Is this adapter durable enough for long-term use?

A: Yes. The adapter is constructed from SS304 stainless steel with a nickel-plated surface, making it highly resistant to the intense heat and corrosive conditions found in an exhaust system.