{"product_id":"hall-effect-ignition-module-mobiletron-vw-golf-citi-im900b","title":"Mobiletron Hall-Effect Ignition Module for VW Golf, Citi, Jetta \u0026 Audi 500 - IM900B","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eVehicle Fitment \u0026amp; Part Details\u003c\/h2\u003e\n\n  \u003cp\u003eThis Mobiletron Hall-effect ignition module (IM900B) fits VW Golf 1, Golf 2, Golf 3, Golf Citi (all variants), Jetta 1, 2 and 3, Fox, Caddy LDV, Kombi (water-cooled 1.8 \/ 1.9 \/ 2.1), Passat 2.2 CLi, Audi 500 2.2 \/ 2.2 Turbo \/ 500E, and BMW 528i E28, 728i \/ 730i \/ 733i \/ 735i E23 \/ E32. It is a 7-pin Hall-effect ignition module used to trigger ignition coil primary current from the distributor's Hall sender. Confirm compatibility by matching the listed fitment details and 7-pin connector to the module being replaced.\u003c\/p\u003e\n\n  \u003ch3\u003eKey Details\u003c\/h3\u003e\n  \u003cdl style=\"display:grid; grid-template-columns: 140px 1fr; gap: 6px 12px; margin:0;\"\u003e\n    \u003cdt style=\"font-weight:600; margin:0;\"\u003eSKU\u003c\/dt\u003e\n    \u003cdd style=\"margin:0;\"\u003eIM900B\u003c\/dd\u003e\n    \u003cdt style=\"font-weight:600; margin:0;\"\u003eComponent\u003c\/dt\u003e\n    \u003cdd style=\"margin:0;\"\u003eIgnition Module\u003c\/dd\u003e\n    \u003cdt style=\"font-weight:600; margin:0;\"\u003eBrand\u003c\/dt\u003e\n    \u003cdd style=\"margin:0;\"\u003eMobiletron\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch3\u003eKey Benefits\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eGenuine Mobiletron-branded module.\u003c\/li\u003e\n    \u003cli\u003eCovers a wide SA-market VW \/ Audi \/ BMW range including the Citi Golf, Golf 1-3, Jetta, and Kombi water-cooled.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n  \u003cdiv style=\"overflow-x:auto; margin:0 0 24px 0;\"\u003e\n    \u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px; line-height:1.45;\"\u003e\n      \u003cthead\u003e\u003ctr style=\"background-color:#1a1a2e; color:#ffffff;\"\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd; vertical-align:top;\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd; vertical-align:top;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003cth scope=\"row\" style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top; text-align:left; font-weight:normal;\"\u003eNumber of Pins\u003c\/th\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top;\"\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003cth scope=\"row\" style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top; text-align:left; font-weight:normal;\"\u003eSpecification\u003c\/th\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top;\"\u003eHall-Effect Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003cth scope=\"row\" style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top; text-align:left; font-weight:normal;\"\u003eBrand\u003c\/th\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd; vertical-align:top;\"\u003eMobiletron\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n  \u003cdiv style=\"overflow-x:auto; margin:0 0 24px 0;\"\u003e\n    \u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px; line-height:1.45;\"\u003e\n      \u003cthead\u003e\u003ctr style=\"background-color:#1a1a2e; color:#ffffff;\"\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd;\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd;\"\u003eVariant\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd;\"\u003eEngine Code\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"padding:5px 8px; text-align:left; border:1px solid #ddd;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eFox\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1800 Sport\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eHV\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1990-1995\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eGolf 1\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1800 GTi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eDX EV\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1983-1984\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eGolf 2\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 CSL \/ 1800 CSX \/ GTX \/ GTi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eHM, HV, EV DX, KR\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1984-1992\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eGolf 3\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 GS \/ 1800 GSX \/ GTS \/ 2.0 GTi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eACG, ACH, 2E\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1993-1999\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eGolf Citi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1.3 \/ 1.6 \/ Blues \/ Deco \/ Lux \/ Shuttle \/ Sonic \/ 1800 \/ CTi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eGY, HM, HV, DX\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1985-2002\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eJetta 1\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 GL \/ GLS \/ GLi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eEM\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1983-1985\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eJetta 2\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 CSL \/ 1800 CSX \/ CLX \/ CLi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eHM, HV, EV\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1985-1992\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eJetta 3\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 CSL \/ 1800 CSX \/ CLX \/ 2000 CLi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eACG, ACH, 2E\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1993-1999\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eCaddy LDV (Golf-based)\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1600 \/ 1800\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eHM, HV\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1986-2006\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eKombi Water-Cooled\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1800 \/ 1900 \/ 2.1i \u0026amp; Syncro\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eAAX, DG, DJ\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1983-1999\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eVW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003ePassat\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e2.2 CLi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eSG\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1985-1987\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eAudi\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e500 \/ 500E \/ 500E SE\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e2.2 \/ 2.2 Turbo \/ 2.3\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eWB, WC, MC, AAR\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1983-1994\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eBMW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e528i E28 \/ 728i E23 \/ 730i E32\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e2.8 \/ 3.0\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eM30B28, M30B30\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1980-1992\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background-color:#ffffff;\"\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eBMW\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e733i E23 \/ 735i E23 \/ E32\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e3.2 \/ 3.5\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003eM30B32, M30B35, M30B35L\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px; border:1px solid #ddd;\"\u003e1978-1992\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eFitment Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAlways match OEM reference number and vehicle details before ordering. Confirm exact fitment using VIN, engine code, or chassis number if multiple variants exist.\u003c\/li\u003e\n    \u003cli\u003eVerify the 7-pin connector shape on the removed module matches before installation.\u003c\/li\u003e\n    \u003cli\u003eMobiletron-branded version of this module.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation \/ Use \/ Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDisconnect the battery before removing the old module.\u003c\/li\u003e\n    \u003cli\u003eMount on a clean metal heatsink surface - the module relies on the mounting surface for heat dissipation. Apply thermal paste where specified.\u003c\/li\u003e\n    \u003cli\u003eEnsure the earth connection is clean and tight.\u003c\/li\u003e\n    \u003cli\u003eInspect the Hall sender in the distributor, ignition coil, HT leads, and plugs at the same time - failed ignition components can mask or accompany a failed module.\u003c\/li\u003e\n    \u003cli\u003eAfter installation, verify the vehicle starts cleanly, idles smoothly, and has no misfires at cruise.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Questions\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eWill this ignition module fit my VW, Audi, or BMW?\u003c\/strong\u003e\u003cbr\u003e\n  This part (IM900B) is listed for the fitments shown on this page. Confirm by matching the 7-pin connector and Hall-effect triggering on the removed module.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eWhat brand is this module?\u003c\/strong\u003e\u003cbr\u003e\n  This listing is for a Mobiletron-branded module.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eIs there a more affordable option?\u003c\/strong\u003e\u003cbr\u003e\n  A budget-friendly alternative is available (SKU IM1800) covering the same fitments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mobiletron","offers":[{"title":"Default Title","offer_id":41917882269927,"sku":"IM900B","price":549.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/5943\/3703\/files\/hall-effect-ignition-module-mobiletron-vw-golf-citi-im900b-1.jpg?v=1776177113","url":"https:\/\/modernautoparts.co.za\/products\/hall-effect-ignition-module-mobiletron-vw-golf-citi-im900b","provider":"Modern Auto Parts ","version":"1.0","type":"link"}