{"product_id":"n-903-663-01-genuine-vw-audi-internal-transmission-socket-head-bolt","title":"N-903-663-01 Genuine VW\/Audi Internal Transmission Socket Head Bolt","description":"\u003ch2\u003eGenuine VW\/Audi M8 × 22mm Transmission Socket Head Bolt\u003c\/h2\u003e\u003cp\u003eN-903-663-01 is an original M8 × 22mm socket head bolt listed at specified manual-transmission selector and clutch-actuation fastening points in the applications below. It provides the correct size of fastening hardware for that original location. This listing supplies \u003cstrong\u003eone individual bolt\u003c\/strong\u003e; selector parts, clutch-actuation components and additional bolts are separate items.\u003c\/p\u003e\u003ch3\u003eTechnical details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM number:\u003c\/strong\u003e N-903-663-01 \/ N90366301.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory catalog size:\u003c\/strong\u003e M8 × 22mm; 8mm nominal metric thread diameter and 22mm nominal bolt length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead and drive:\u003c\/strong\u003e Socket head with an internal drive recess, as shown in the original archive photograph.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirmed location:\u003c\/strong\u003e DHW internal selector position 17, or the assigned RS4 clutch-actuation position 7. Match the application-specific diagram.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplied quantity:\u003c\/strong\u003e One bolt. Quantity used varies by assembly; order the quantity required by the specific repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication control:\u003c\/strong\u003e Exact original part number, transmission code and fastening position.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe diameter, length and head seating arrangement must all match the assigned joint. A bolt with the same M8 thread can still be unsuitable if its length or bearing surface differs. Incorrect hardware can bottom in the receiving hole or provide inadequate engagement instead of clamping the intended component. No unverified strength grade, material treatment or adhesive specification is claimed.\u003c\/p\u003e\u003cp\u003eThe factory parts table also lists N-903-663-03 as a separate self-locking entry at this assembly position. Confirm which revision and fastening treatment the actual transmission and current repair procedure require. This listing is for N-903-663-01 and does not establish that the earlier bolt can replace every later self-locking arrangement.\u003c\/p\u003e\u003ch3\u003eCommon reasons to replace\u003c\/h3\u003e\u003cp\u003eReplace the original bolt when its internal drive is rounded, its threads are stripped or cross-threaded, corrosion compromises the seating surfaces, or the hardware is missing during gearbox service. Correct an unsuitable substitute found during a prior repair. Follow any requirement in the applicable factory procedure to renew fastening hardware after disassembly.\u003c\/p\u003e\u003cp\u003eInspect the receiving threads and retained component before installation. Damaged threads, a cracked component or distortion at the mounting point need separate attention. A replacement bolt cannot restore worn selector parts, damaged synchronizers or a malfunctioning clutch. Diagnose a shifting complaint before treating this fastener as the cause.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eIdentify the installed transmission by its stamped code and match the original parts diagram. A gearbox replacement can change the required hardware even when the vehicle's model, engine and year remain the same. Each confirmed profile is limited to its stated transmission and fastening point.\u003c\/p\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 A4\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e1.8L turbo gasoline inline-four\u003c\/td\u003e\n\u003ctd\u003eB5 sedan; front-wheel drive; original DHW transmission; Five-speed manual 012 \/ 01W; DHW code only for this confirmed profile\u003c\/td\u003e\n\u003ctd\u003eOriginal internal selector assembly position 17 specifying N90366301, M8 × 22. Match original hardware and current factory repair requirements; the catalog separately lists self-locking N90366303. Not a universal replacement for that other revision, a quattro gearbox, or an external linkage bolt.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi RS4\u003c\/td\u003e\n\u003ctd\u003e2007–2008\u003c\/td\u003e\n\u003ctd\u003e4.2L naturally aspirated gasoline V8\u003c\/td\u003e\n\u003ctd\u003eB7 sedan; quattro; six-speed manual; Factory six-speed manual\u003c\/td\u003e\n\u003ctd\u003eSpecified clutch actuation assembly bolt at catalog position 7, PR TK7, assigned N90366301 M8 × 22mm. Confirm current original-number assignment and required fastening treatment. Do not substitute this bolt wherever N90366303 self-locking hardware is required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi RS4 Cabriolet\u003c\/td\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003e4.2L naturally aspirated gasoline V8\u003c\/td\u003e\n\u003ctd\u003eB7 convertible; quattro; six-speed manual; Factory six-speed manual\u003c\/td\u003e\n\u003ctd\u003eSpecified clutch actuation assembly bolt at catalog position 7, PR TK7, assigned N90366301 M8 × 22mm. Confirm current original-number assignment and required fastening treatment. Do not substitute this bolt wherever N90366303 self-locking hardware is required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation and service guidance\u003c\/h3\u003e\u003cp\u003eAccess to the specified selector or clutch-actuation attachment depends on the factory repair procedure and may involve removing or disassembling the transmission. Keep the work area clean, protect exposed gearbox components from debris and use the correctly fitting driver fully seated in the bolt head. Align the original components before tightening so the bolt is not used to pull a misaligned part into place.\u003c\/p\u003e\u003cp\u003eFollow the specified tightening procedure and any required fastening treatment for the exact original revision. Use the applicable instructions for the specified DHW selector or RS4 clutch-actuation assembly; there is no universal tightening value based solely on an M8 diameter. Renew any seals or additional hardware required by that procedure and verify selector operation before completing assembly.\u003c\/p\u003e","brand":"Genuine VW\/Audi","offers":[{"title":"Default Title","offer_id":48018133778609,"sku":"N-903-663-01","price":5.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/1379\/3201\/files\/n-903-663-01-genuine-vw-audi-1.jpg?v=1791768196","url":"https:\/\/hstuning.com\/products\/n-903-663-01-genuine-vw-audi-internal-transmission-socket-head-bolt","provider":"HS Tuning ","version":"1.0","type":"link"}