{"product_id":"ntk-24351-air-fuel-ratio-sensor-upstream-left","title":"NTK 24351 Air \/ Fuel Ratio Sensor - Upstream Left","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eNTK 24351 is a direct-fit air\/fuel ratio sensor for specific Volkswagen applications. It is a heated, 5-wire sensor built for precise exhaust feedback and OE-style fitment.\u003c\/p\u003e\u003cp\u003eFits 2004 Volkswagen Touareg, upstream left. Part number 24351 is also referenced for the same application under cross numbers used by other brands.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit design for specific application coverage\u003c\/li\u003e\n\u003cli\u003eHeated sensor construction for faster operating response\u003c\/li\u003e\n\u003cli\u003e5-wire configuration for accurate signal delivery\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter with 0.38 thread length\u003c\/li\u003e\n\u003cli\u003e39.3 harness length for proper routing\u003c\/li\u003e\n\u003cli\u003eNTK OE-focused sensor engineering and manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 24351 is an air\/fuel ratio sensor engineered for the 2004 Volkswagen Touareg, upstream left. As a direct-fit, specific-application sensor, it matches the OE equivalent design called out for this vehicle and uses a heated 5-wire layout to support stable exhaust monitoring. The 18 mm thread diameter and 39.3 harness length help ensure the sensor installs in the intended location without guesswork.\u003c\/p\u003e\u003cp\u003eNTK is part of the NGK family and is known for oxygen sensor manufacturing with tight control over ceramic materials and production processes. That background supports consistent fit, form, and function across NTK sensor applications, including this NTK 24351 replacement.\u003c\/p\u003e\u003cp\u003eThis part cross-references DENSO Auto Parts (e.g., 234-5115) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFaulty air\/fuel ratio sensor readings\u003c\/li\u003e\n\u003cli\u003eCheck engine light concerns related to sensor performance\u003c\/li\u003e\n\u003cli\u003eRough idle or drivability issues tied to exhaust feedback\u003c\/li\u003e\n\u003cli\u003eIncorrect fuel control caused by aging sensor response\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the upstream left position and OE-equivalent design before installation. Confirm connector routing, thread size, and harness length against the original sensor to avoid fitment issues. Use the vehicle’s service procedure for removal and installation, and inspect the exhaust bung threads before threading in the new sensor.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also emphasizes OE application technology and original equipment sensor manufacturing expertise.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731391242421,"sku":"BFPZ-24351","price":202.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_24351_Fro.jpg?v=1794295367","url":"https:\/\/www.partcatalog.com\/products\/ntk-24351-air-fuel-ratio-sensor-upstream-left","provider":"PartCatalog","version":"1.0","type":"link"}