{"product_id":"genuine-bmw-e23-e24-e28-m30-auxiliary-air-bypass-housing-11631271342","title":"Genuine BMW E23 E24 E28 M30 Auxiliary Air Bypass Housing – 11631271342","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOriginal used BMW auxiliary-air bypass housing for selected BMW E23, E24 and E28 models equipped with an M30 petrol engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis aluminium housing forms part of the engine’s auxiliary-air and cold-idle system. It connects and routes the relevant air hoses used together with the auxiliary air slide valve.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe housing carries casting number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1 271 344\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The corresponding BMW catalogue number is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e11631271342\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is a passive aluminium housing without electrical or moving components. Several similar housings and hose arrangements were used depending on the vehicle model, production date and country specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eProduct details\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eProduct: Auxiliary-air bypass housing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAlternative description: Air bypass hose connector\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGerman description: Umleitgehäuse\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eManufacturer: Genuine BMW\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eBMW part number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e11631271342\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFormatted BMW number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e11 63 1 271 342\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eShort BMW reference number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1271342\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCasting number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1 271 344\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCompact casting number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1271344\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngine family: BMW M30\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNumber of hose connections: Three\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaterial: Cast aluminium\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMounting bracket: Integrated\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstallation position: Engine intake and auxiliary-air system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCondition: Used\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuantity: One\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eVehicle compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSuitable for selected M30-powered BMW models using the corresponding auxiliary-air hose system.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eBMW 5 Series E28\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW 525i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 528i\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eBMW 6 Series E24\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW 628CSi\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 633CSi\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 635CSi\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eBMW 7 Series E23\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW 728i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 728iS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 732i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 733i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 735i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW 745i with the corresponding M30 intake system\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCompatibility depends on the model, production date, engine version, transmission, emissions equipment and country specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCertain Australian, Swedish, Swiss and other market-specific vehicles used different auxiliary-air valves, hoses or connection arrangements. Always compare the BMW part number, casting number, mounting point and all three hose connections with the original component before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eBMW and casting numbers\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11631271342\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – BMW auxiliary-air bypass housing\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11 63 1 271 342\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Formatted BMW catalogue number\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e1271342\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Short BMW catalogue reference\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e1 271 344\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Casting number visible on the housing\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e1271344\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Compact casting reference\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe casting number is not identical to the BMW catalogue number. The part should be ordered and identified primarily using BMW number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e11631271342\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFunction\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe housing connects the hoses in the auxiliary-air bypass circuit. During cold operation, additional air can be routed around the closed throttle through the auxiliary air slide valve, helping the engine maintain a higher and more stable cold-idle speed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe exact hose arrangement varies between different models and production periods. This listing includes only the aluminium bypass housing.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCondition\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOriginal used BMW component with visible age- and use-related wear, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDirt and storage marks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAluminium oxidation and surface discolouration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDeposits inside and around the hose connections\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMarks from previously fitted hoses and clamps\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCosmetic wear around the mounting point\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGeneral wear consistent with an original classic BMW engine component\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNo cracks are clearly visible in the photograph, but the housing has not been pressure- or leak-tested.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe housing should be thoroughly cleaned and inspected before installation. Supplied exactly as shown in the photograph.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOne original BMW auxiliary-air bypass housing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated mounting flange\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNo hoses, hose clamps, auxiliary air slide valve, O-ring, gasket, mounting bolt or other installation hardware are included.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation recommendation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore installation:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThoroughly clean all internal passages\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove corrosion and old hose deposits carefully\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the aluminium housing for cracks or porosity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck all hose connections for deformation or damage\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompare the hose diameters and orientation with the original housing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse suitable replacement hoses and clamps\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace any required seal or O-ring\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck the complete auxiliary-air system for vacuum leaks after installation\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAir leaks in this system may cause an excessively high, low or unstable idle speed. Installation should preferably be carried out by someone familiar with classic BMW M30 intake systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eStorage location:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 203\u003c\/span\u003e\u003c\/p\u003e","brand":"Tayushi","offers":[{"title":"Default Title","offer_id":57480136982903,"sku":null,"price":34.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/3704\/2551\/files\/84622F45-ED5E-4E63-9008-0CAAA49802A8_1_105_c.jpg?v=1790018322","url":"https:\/\/www.tayushi.com\/de\/products\/genuine-bmw-e23-e24-e28-m30-auxiliary-air-bypass-housing-11631271342","provider":"Tayushi","version":"1.0","type":"link"}