{"product_id":"holley-efi-oxygen-sensor-sniper-efi-terminator-x-replacement","title":"Holley EFI Oxygen Sensor – Sniper EFI \u0026 Terminator X Replacement","description":"\u003cp\u003eThe \u003cstrong\u003eHolley EFI Bosch Wideband Oxygen Sensor\u003c\/strong\u003e is a genuine replacement sensor designed for \u003cstrong\u003eHolley Sniper EFI\u003c\/strong\u003e and \u003cstrong\u003eTerminator X EFI\u003c\/strong\u003e systems. This wideband lambda sensor delivers accurate air\/fuel ratio feedback to the ECU for precise fuel control, self-learning operation, and engine tuning.\u003c\/p\u003e\n\u003cp\u003eFeaturing an M18 x 1.5 screw-in thread and factory-applied anti-seize compound, this replacement sensor installs quickly while providing the reliability expected from Bosch OEM technology. Whether replacing a worn sensor or keeping a spare in the trailer, this service part helps maintain accurate fueling and optimal EFI performance.\u003c\/p\u003e\n\u003ch4\u003eIncludes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Bosch Wideband Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003ePre-Applied Anti-Seize on Sensor Threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eHolley EFI \/ Bosch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e554-155\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWideband Oxygen Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eWideband Lambda\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBand Type\u003c\/td\u003e\n\u003ctd\u003eWideband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003eM18 x 1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eScrew-In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Gender\u003c\/td\u003e\n\u003ctd\u003eFemale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit Type\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Preparation\u003c\/td\u003e\n\u003ctd\u003eAnti-Seize Pre-Applied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEFI System\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolley Sniper EFI\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolley Terminator X\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement oxygen sensor for compatible Holley Sniper EFI systems.\u003c\/li\u003e\n\u003cli\u003eDirect replacement oxygen sensor for compatible Holley Terminator X systems.\u003c\/li\u003e\n\u003cli\u003eUses an M18 x 1.5 oxygen sensor bung.\u003c\/li\u003e\n\u003cli\u003eUniversal screw-in design.\u003c\/li\u003e\n\u003cli\u003eVerify connector style and ECU compatibility before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ch3\u003e1. Why is a wideband oxygen sensor important?\u003c\/h3\u003e\n\u003cp\u003eA wideband oxygen sensor continuously measures the engine's air\/fuel ratio and provides feedback to the ECU for fuel corrections, self-learning, and accurate tuning.\u003c\/p\u003e\n\u003ch3\u003e2. When should the sensor be replaced?\u003c\/h3\u003e\n\u003cp\u003eReplacement is recommended if the sensor becomes contaminated, damaged, slow to respond, or no longer provides accurate air\/fuel ratio readings. Keeping a spare sensor is common for race and off-road vehicles.\u003c\/p\u003e\n\u003ch3\u003e3. Does the sensor come ready to install?\u003c\/h3\u003e\n\u003cp\u003eYes. The threads feature factory-applied anti-seize compound to help simplify installation and future removal.\u003c\/p\u003e\n\u003ch3\u003e4. What thread size does it use?\u003c\/h3\u003e\n\u003cp\u003eThis sensor uses the industry-standard M18 x 1.5 oxygen sensor thread and installs into a compatible welded sensor bung.\u003c\/p\u003e\n\u003ch3\u003e5. Is this an original Bosch sensor?\u003c\/h3\u003e\n\u003cp\u003eYes. This replacement uses a genuine Bosch wideband oxygen sensor specified for compatible Holley Sniper EFI and Terminator X systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":56901568888998,"sku":"554-155","price":152.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/554-155-Holley-EFI-Oxygen-Sensor-1_2d4c16c1-9a14-43b3-a1b9-46c487bc8877.jpg?v=1785792738","url":"https:\/\/wideopendesign.com\/products\/holley-efi-oxygen-sensor-sniper-efi-terminator-x-replacement","provider":"Wide Open Design","version":"1.0","type":"link"}