Exoracing O2 Lambda Sensor Adapter Weld In Nut M18x1.5 Stainless Steel

<div class="pdp-buying-guide"> <h2>Choose The Right Weld-In O2 Lambda Sensor Nut For Your Exhaust</h2> <p>The Exoracing O2 lambda sensor adapter weld-in nut is designed to add an M18x1.5 sensor port to stainless exhaust pipework. It is useful when fitting a wideband sensor, adding an extra lambda sensor position for tuning, replacing a damaged sensor boss, or building a custom exhaust, downpipe or turbo setup that needs a clean sensor mounting point.</p> <ul> <li><strong>Thread:</strong> M18x1.5, the common thread used by many narrowband and wideband oxygen sensors</li> <li><strong>Material:</strong> 304 stainless steel</li> <li><strong>Install type:</strong> weld-in sensor nut with machined collar</li> <li><strong>Hole size guidance:</strong> drill a 22mm or 23mm hole before welding</li> <li><strong>Included:</strong> 1 lambda sensor adapter nut and Exoracing lifetime warranty</li> </ul> <p><strong>Important:</strong> this part must be welded into the exhaust. Confirm your sensor thread is M18x1.5, check the sensor angle/location required by your wideband or lambda sensor manufacturer, and use a professional welder if you are not confident fabricating stainless exhaust parts.</p> </div> <h2>Why Do You Need A Weld-In Lambda Sensor Nut?</h2> <p>Most OEM and aftermarket exhaust systems only have the sensor ports needed for the original setup. That can become a problem when you add a wideband for tuning, build a turbo conversion, change the downpipe, or need to move the lambda sensor into a better position.</p> <p>A weld-in lambda sensor nut lets you add a proper threaded port exactly where it is needed. The Exoracing adapter is machined from 304 stainless steel and uses the common M18x1.5 oxygen sensor thread, making it suitable for many narrowband and wideband sensor applications where the sensor also uses M18x1.5.</p> <p>The machined collar helps the adapter sit neatly in the drilled hole before welding. Once installed correctly, it gives the sensor a strong, serviceable threaded mounting point in the exhaust. If you are building or refreshing an exhaust sensor setup, it is also worth checking the <a href="https://exoracing.co.uk/exoracing-o2-lambda-sensor-spacer-m18x1-5-304-stainless/">Exoracing O2 lambda sensor spacer</a>, <a href="https://exoracing.co.uk/exoracing-gold-and-silver-heat-reflective-tape/">Exoracing heat reflective tape</a> for nearby heat protection, and <a href="https://exoracing.co.uk/exoracing-stainless-steel-v-band-clamp-with-flanges/">Exoracing stainless steel V-band clamps</a> for serviceable exhaust fabrication joints.</p> <h2>Fitment And Compatibility Guide</h2> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr> <td style="width: 35%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">Check</span></strong></td> <td style="width: 65%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">What To Confirm</span></strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Sensor thread</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Your oxygen, lambda or wideband sensor must use an M18x1.5 thread.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Exhaust material</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">This adapter is 304 stainless steel and is best suited to stainless exhaust fabrication.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Hole size</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Drill a 22mm or 23mm hole so the adapter can sit correctly before welding.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Sensor angle</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Follow your sensor manufacturer's guidance. Wideband sensors often need a specific angle to avoid moisture damage and poor readings.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Access</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Leave enough space to install, remove and service the sensor after welding.</td> </tr> </tbody> </table> <h2>When Should You Use This Adapter?</h2> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr> <td style="width: 40%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">Use Case</span></strong></td> <td style="width: 60%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">Why It Helps</span></strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Wideband install</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Adds a dedicated M18x1.5 sensor port for tuning and air-fuel ratio monitoring.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Turbo conversion</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Allows you to position the sensor correctly in new downpipe or exhaust pipework.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Custom exhaust fabrication</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Gives the exhaust fabricator a clean weld-in sensor boss.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Damaged sensor port repair</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Can replace a damaged or badly positioned lambda sensor boss during exhaust repair.</td> </tr> </tbody> </table> <h2>Purchase Includes:</h2> <ul> <li>1 x Exoracing O2 lambda sensor adapter weld-in nut</li> <li>1 x Exoracing lifetime warranty</li> </ul> <h2>Features:</h2> <ul> <li>Adds an extra O2, lambda or wideband sensor port when needed</li> <li>M18x1.5 thread for common narrowband and wideband oxygen sensors</li> <li>Machined from 304 stainless steel</li> <li>Weld-in design for exhaust, downpipe and turbo fabrication</li> <li>Machined collar helps locate the adapter during installation</li> <li>Can be used to replace a damaged sensor boss when correctly fabricated</li> <li>Compact 13mm height and 20g weight</li> <li>Includes Exoracing lifetime warranty</li> </ul> <h2>Exoracing O2 Lambda Sensor Weld-In Nut Installation Guide:</h2> <p>Welding and exhaust modification are required. If you are not confident welding stainless exhaust parts, ask a professional fabricator to install the adapter.</p> <ol> <li>Remove the exhaust section, downpipe or pipework you plan to modify.</li> <li>Choose the sensor location carefully, leaving enough room to fit and remove the sensor later.</li> <li>Check your wideband or lambda sensor manufacturer's recommended sensor angle and position before drilling.</li> <li>Clean the exhaust surface where the adapter will be welded.</li> <li>Mark the hole position and drill a 22mm or 23mm hole.</li> <li>Place the adapter into the hole with the machined collar sitting on the outside of the pipework.</li> <li>Weld around the adapter fully and allow it to cool.</li> <li>Once cool, test-fit the M18x1.5 sensor and check that the threads are clean before final installation.</li> </ol> <h2>Technical Specifications:</h2> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">Specification</span></strong></td> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8; background-color: #4b1f73; color: #ffffff;"><strong><span style="color: #ffffff;">Details</span></strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Material</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">304 stainless steel</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Thread</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">M18x1.5</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Height</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">13mm</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Outer Diameter</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">22mm</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Outer Diameter Including Collar</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">24.5mm</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Collar Height</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">7mm</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Recommended Drill Hole</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">22mm or 23mm</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Weight</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">20g</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Warranty</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Exoracing lifetime warranty</td> </tr> </tbody> </table> <h2>Frequently Asked Questions</h2> <h3>What thread is this lambda sensor adapter?</h3> <p>This weld-in adapter uses an M18x1.5 thread, which is commonly used by many O2, lambda and wideband sensors. Check your sensor thread before ordering.</p> <h3>What size hole do I need to drill?</h3> <p>Drill a 22mm or 23mm hole, then sit the adapter into the hole using the collar before welding.</p> <h3>Can this be used for a wideband sensor?</h3> <p>Yes, if your wideband sensor uses an M18x1.5 thread. Always follow the wideband manufacturer's recommended sensor angle and position.</p> <h3>Does this need welding?</h3> <p>Yes. This is a weld-in exhaust fabrication part and should be welded into the pipework by a competent welder or fabricator.</p> <h3>Can I use this to replace a damaged sensor port?</h3> <p>Yes, it can be used as part of a repair or fabrication job if the damaged section is removed or prepared correctly and the new adapter is welded in properly.</p> <h2>Notes:</h2> <ul> <li>Professional welding is recommended.</li> <li>Confirm your sensor thread is M18x1.5 before ordering.</li> <li>Check sensor angle and location before drilling.</li> <li>Test-fit the sensor after welding and before final exhaust installation.</li> </ul> <div class="exo-v2-related-source-grid"> <div class="exo-v2-related-source-card is-current"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/305/images/60785/exoracing-02-lambda-weld-in-adapter__94776.1778776571.386.513.JPG?c=2" alt="Exoracing M18x1.5 O2 lambda sensor weld-in adapter close up" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing O2 Lambda Sensor Adapter Weld In Nut M18x1.5 Stainless Steel</h3> <p class="exo-v2-related-source-text">Adds an M18x1.5 lambda sensor port.</p> <a href="#exo-v2-buy">Choose this product</a></div> <div class="exo-v2-related-source-card"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/302/images/61077/exoracing-5bolt-turbo-downpipe-0.63ar-stainless__74027.1729182548.386.513.JPG?c=2" alt="Exoracing Turbo Downpipe Gasket 5-Bolt A/R 0.63 Stainless Steel" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing Turbo Downpipe Gasket 5-Bolt A/R 0.63 Stainless Steel</h3> <p class="exo-v2-related-source-text">Fits T3 and T4 turbos with a .63 A/R 5 bolt turbo to downpipe outlet</p> <a href="../../../../exoracing-turbo-downpipe-gasket-stainless-5bolt-t3-t4-a-r-0-63/">View product</a></div> <div class="exo-v2-related-source-card"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/303/images/61087/exoracing-downpipe-gasket-stainless-steel-T25__28135.1729182549.386.513.JPG?c=2" alt="Exoracing Turbo Downpipe Gasket 5-Bolt T25 Stainless Steel" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing Turbo Downpipe Gasket 5-Bolt T25 Stainless Steel</h3> <p class="exo-v2-related-source-text">Five-bolt stainless downpipe gasket for a compatible T25 turbo outlet</p> <a href="../../../../exoracing-turbo-downpipe-gasket-5-bolt-t3-t4-t25/">View product</a></div> <div class="exo-v2-related-source-card"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/301/images/61078/exoracing-4bolt-downpipe-gasket-2.5-3__55930.1729182558.386.513.JPG?c=2" alt="Exoracing Turbo Downpipe Gasket 4 Bolt Stainless Steel" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing 4 Bolt Turbo Downpipe Gasket Stainless Steel</h3> <p class="exo-v2-related-source-text">Fits turbos with a 2.5" or 3.0" 4 bolt turbo to downpipe outlet</p> <a href="../../../../exoracing-4-bolt-turbo-downpipe-gasket-stainless-steel/">View product</a></div> </div>

Exoracing Ltd offers a lifetime warranty against manufacturing defects on this Exoracing Ltd product for peace of mind and a risk-free buying experience! We have 100% faith in our products and know they are of the highest quality, so where most manufacturers offer a year, we decided to offer a massive lifetime warranty.

Exoracing Ltd lifetime warranty will cover repairing, replacing, or store credit to the same purchase value if the part has since been discontinued, at our discretion, for any Exoracing Ltd product that is found defective.

Exoracing Ltd's lifetime warranty policy will only apply if the product was purchased through ourselves or an officially licenced distributor in our network.

This warranty policy is non-transferable and all claims under this policy must be accompanied by the original receipt of sale.