{"product_id":"n-903-168-02-genuine-vw-audi-coolant-temperature-sensor-o-ring","title":"N-903-168-02 Genuine VW\/Audi Coolant Temperature Sensor O-Ring","description":"\u003cp\u003e\u003cstrong\u003eGenuine VW\/Audi coolant temperature sensor O-ring, part number N-903-168-02.\u003c\/strong\u003e This original sealing ring closes the connection between the assigned clip-in coolant temperature sensor and its coolant flange or hose housing. It is supplied individually for sensor replacement or repair of a diagnosed leak at the sealing connection.\u003c\/p\u003e\u003ch3\u003eTechnical details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOriginal number: N-903-168-02 \/ N90316802.\u003c\/li\u003e\n\u003cli\u003ePublished nominal dimensions: 19.6 x 3.6 mm.\u003c\/li\u003e\n\u003cli\u003eApplication: specified clip-in coolant temperature sensor sealing position.\u003c\/li\u003e\n\u003cli\u003eOne O-ring supplied. Sensor, retaining clip, coolant flange, hoses and coolant are separate.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe O-ring forms the fluid seal around the sensor's mounting connection. The separately specified retaining clip locates and retains the sensor; the ring does not replace that clip. Correct seal size and an undamaged housing are essential to a sound cooling-system connection.\u003c\/p\u003e\u003cp\u003eCooling assemblies can contain several similar-looking seals. Match the original ring number and the actual sensor arrangement rather than selecting by vehicle model alone. This ring is not a thermostat gasket, water pump seal or general-purpose substitute for other cooling connections.\u003c\/p\u003e\u003ch3\u003eCommon reasons to replace\u003c\/h3\u003e\u003cp\u003eRenew the seal during sensor replacement when required by the applicable procedure. Replace a cut, flattened, hardened, swollen or otherwise damaged ring, or a ring that no longer seats correctly in its assigned connection.\u003c\/p\u003e\u003cp\u003eCoolant residue or a diagnosed leak around the sensor can indicate a sealing problem. Inspect the sensor seating area, retaining clip, flange and nearby hoses to establish the actual source before ordering repair parts.\u003c\/p\u003e\u003cp\u003ePrevious installation can pinch the ring or leave an incorrect seal in place. Replace unsuitable or damaged sealing hardware and inspect the housing for damage before refitting the sensor.\u003c\/p\u003e\u003cp\u003eA new O-ring cannot repair a cracked coolant flange, damaged sensor housing, missing retaining clip or a leak from an adjacent hose. Temperature readings and fault codes also require diagnosis of the sensor and electrical circuit; replacing the ring alone does not correct an electrical defect.\u003c\/p\u003e\u003ch3\u003eInstallation and service notes\u003c\/h3\u003e\u003cp\u003eFollow the factory procedure for the exact coolant sensor arrangement. Allow the system to cool and release pressure as prescribed before opening the connection. Collect coolant using the required service method.\u003c\/p\u003e\u003cp\u003eRemove the sensor and old seal carefully. Inspect the sensor sealing area and housing bore, and remove old seal material or debris without damaging the contact surfaces. Correct a cracked or distorted housing before installing a new ring.\u003c\/p\u003e\u003cp\u003eFit the prescribed seal in the proper position. Use only the installation preparation specified by the procedure, and avoid twisting, cutting or pinching the ring as the sensor enters the housing.\u003c\/p\u003e\u003cp\u003eSeat the sensor fully and install the correctly specified retaining clip. Do not force the clip into a partially seated connection or use the retaining hardware to compensate for an incorrect seal. Check the clip, sensor and housing engagement before refilling.\u003c\/p\u003e\u003cp\u003eRestore the cooling system using the specified coolant and filling or bleeding procedure. Do not infer coolant type or fill quantity from the O-ring number. Select fluid and other cooling service components separately for the vehicle.\u003c\/p\u003e\u003cp\u003eComplete the prescribed leakage and operating-temperature checks after service. If seepage remains, inspect the sensor seating, seal condition, clip engagement and housing before continuing operation. This listing supplies one original O-ring.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eModel years\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003eApplication restrictions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi S4\u003c\/td\u003e\n\u003ctd\u003e2000–2002\u003c\/td\u003e\n\u003ctd\u003e2.7L twin-turbocharged gasoline V6, APB\u003c\/td\u003e\n\u003ctd\u003eB5 sedan, quattro; 6-speed manual\u003c\/td\u003e\n\u003ctd\u003eOriginal clip-in coolant temperature sensor sealing position requiring N90316802. Confirm sensor, coolant flange and original seal number; other cooling seals differ.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi S4 Avant\u003c\/td\u003e\n\u003ctd\u003e2001–2002\u003c\/td\u003e\n\u003ctd\u003e2.7L twin-turbocharged gasoline V6, APB\u003c\/td\u003e\n\u003ctd\u003eB5 wagon, quattro; 6-speed manual\u003c\/td\u003e\n\u003ctd\u003eOriginal clip-in coolant temperature sensor sealing position requiring N90316802. Confirm sensor, coolant flange and original seal number; other cooling seals differ.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eConfirm original N90316802 at the actual coolant temperature sensor sealing position before ordering. One O-ring supplied.\u003c\/em\u003e\u003c\/p\u003e","brand":"Genuine VW\/Audi","offers":[{"title":"Default Title","offer_id":48008262287537,"sku":"N-903-168-02","price":4.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/1379\/3201\/files\/n-903-168-02-genuine-vw-audi-1.jpg?v=1791333549","url":"https:\/\/hstuning.com\/products\/n-903-168-02-genuine-vw-audi-coolant-temperature-sensor-o-ring","provider":"HS Tuning ","version":"1.0","type":"link"}