{"product_id":"glow-plug-control-unit-relay-bmw-12217801200","title":"Glow Plug Control Unit Relay – BMW (12217801200) Diesel Relay","description":"\u003cp\u003eThe \u003cstrong data-start=\"263\" data-end=\"313\"\u003eglow plug control unit relay (OEM 12217801200)\u003c\/strong\u003e is a critical electrical control module for diesel-powered BMW engines, responsible for regulating the current delivered to the vehicle’s glow plugs during engine start-up. By precisely controlling the activation timing and power to each glow plug, this control unit helps ensure efficient cylinder pre-heating, smoother cold starts, and reduced emissions, especially in colder conditions. A faulty glow plug relay can result in hard starting, extended crank time, excessive exhaust smoke, or glow plug warning lights, making timely replacement essential for reliable diesel engine performance and start-up behaviour. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Number:\u003c\/strong\u003e 12217786821, 12217801200, 12237786869, H7285681, 132302, 0884030, 75614324, GSE101\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eOperating Mode :\u003c\/strong\u003e 12V \u003cbr\u003e\u003cbr\u003e4 CYLINDER MODELS ONLY! \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eQuantity :\u003c\/strong\u003e 1\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor the Following Cars :\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eAlpina D3 (E90) 2.0 Saloon 12.2005-04.2008\u003cbr\u003eAlpina D3 (E91) 2.0 Estate 12.2005-04.2008\u003cbr\u003eBMW 1 (E87) 118 d Hatchback 06.2004-02.2007\u003cbr\u003eBMW 1 (E87) 120 d Hatchback 06.2004-06.2011\u003cbr\u003eBMW 3 (E46) 318 d Saloon 09.2001-03.2003\u003cbr\u003eBMW 3 (E46) 320 d Saloon 09.2001-05.2005\u003cbr\u003eBMW 3 (E90) 318 d Saloon 03.2005-08.2007\u003cbr\u003eBMW 3 (E90) 320 d Saloon 12.2004-09.2007\u003cbr\u003eBMW 3 Compact (E46) 318 td Hatchback 03.2003-02.2005\u003cbr\u003eBMW 3 (E46) 320 Cd Convertible 02.2005-12.2007\u003cbr\u003eBMW 3 (E46) 320 Cd Coupe 11.2003-07.2006\u003cbr\u003eBMW 3 Touring (E46) 318 d Estate 03.2003-02.2005\u003cbr\u003eBMW 3 Touring (E46) 320 d Estate 09.2001-02.2005\u003cbr\u003eBMW 3 Touring (E91) 318 d Estate 09.2005-08.2007\u003cbr\u003eBMW 3 Touring (E91) 320 d Estate 12.2004-08.2007\u003cbr\u003eBMW 5 (E60) 520 d Saloon 09.2005-02.2007\u003cbr\u003eBMW 5 Touring (E61) 520 d Estate 04.2005-05.2010\u003cbr\u003eBMW X3 (E83) 2.0 d SUV 09.2004-08.2007 \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eAll our Glow Plug Control Unit Relay For BMW 12217801200 are OEM quality and reliable after market car parts. This Glow Plug Control Unit Relay For BMW 12217801200 \u003cspan\u003eis specifically compatible with Alpina D3, BMW 1, 3, 5 \u0026amp; X3.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003ePlease use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eIf you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing \u0026amp; shipping guide here.\u003c\/p\u003e\n\u003ch2 data-start=\"976\" data-end=\"991\"\u003eKey Benefits\u003c\/h2\u003e\n\u003cp data-start=\"993\" data-end=\"1217\"\u003e\u003cstrong data-start=\"993\" data-end=\"1039\"\u003e\u003cbr\u003eRegulates Glow Plug Current with Precision\u003c\/strong\u003e\u003cbr data-start=\"1039\" data-end=\"1042\"\u003eThis control unit manages the electrical current supplied to the glow plugs, ensuring they heat consistently at each ignition cycle for effective cold starting and combustion.\u003c\/p\u003e\n\u003cp data-start=\"1219\" data-end=\"1515\"\u003e\u003cstrong data-start=\"1219\" data-end=\"1261\"\u003eDirect Replacement for OEM 12217801200\u003c\/strong\u003e\u003cbr data-start=\"1261\" data-end=\"1264\"\u003eManufactured to match the original equipment specifications, this relay installs directly in place of the factory unit with no modifications required, maintaining correct electrical and engine control integration.\u003c\/p\u003e\n\u003cp data-start=\"1517\" data-end=\"1754\"\u003e\u003cstrong data-start=\"1517\" data-end=\"1552\"\u003eImproves Cold Start Reliability\u003c\/strong\u003e\u003cbr data-start=\"1552\" data-end=\"1555\"\u003eBy ensuring the glow plugs receive the correct power and timing, this unit helps reduce difficult starts, especially in cold weather, lower crank times, and decreases visible white smoke at start-up.\u003c\/p\u003e\n\u003cp data-start=\"1756\" data-end=\"1988\"\u003e\u003cstrong data-start=\"1756\" data-end=\"1801\"\u003eSupports Engine Performance and Emissions\u003c\/strong\u003e\u003cbr data-start=\"1801\" data-end=\"1804\"\u003eAccurate glow plug control contributes to complete combustion right from start-up, helping reduce unburnt fuel emissions, improve fuel economy, and maintain optimal engine performance.\u003c\/p\u003e\n\u003cp data-start=\"1990\" data-end=\"2266\"\u003e\u003cstrong data-start=\"1990\" data-end=\"2022\"\u003eWide BMW Model Compatibility\u003c\/strong\u003e\u003cbr data-start=\"2022\" data-end=\"2025\"\u003eCompatible with a variety of BMW 1, 3, 5, 6, 7 Series and X-Series diesel models that use part number \u003cstrong data-start=\"2127\" data-end=\"2142\"\u003e12217801200\u003c\/strong\u003e or equivalent references, ensuring broad applicability across popular diesel engines.\u003c\/p\u003e\n\u003ch2 data-start=\"2273\" data-end=\"2309\"\u003eFrequently Asked Questions (FAQs)\u003c\/h2\u003e\n\u003cp data-start=\"2311\" data-end=\"2685\"\u003e\u003cstrong data-start=\"2311\" data-end=\"2362\"\u003e\u003cbr\u003eQ: What does a glow plug control unit relay do?\u003c\/strong\u003e\u003cbr data-start=\"2362\" data-end=\"2365\"\u003eA glow plug control relay regulates the electric current to the glow plugs based on signals from the engine control unit (ECU), allowing the glow plugs to pre-heat each combustion chamber properly prior to engine start-up. This improves start-up performance and reduces engine wear. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.onlinecarparts.co.uk\/oenumber\/12217801200.html?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.onlinecarparts.co.uk\/oenumber\/12217801200.html?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-[15ch] grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2687\" data-end=\"3005\"\u003e\u003cstrong data-start=\"2687\" data-end=\"2745\"\u003eQ: What are the symptoms of a failing glow plug relay?\u003c\/strong\u003e\u003cbr data-start=\"2745\" data-end=\"2748\"\u003eCommon symptoms include difficulty starting the engine in cold conditions, extended crank time, illumination of the glow plug warning light, rough idle shortly after starting, and increased white smoke from the exhaust. \u003c\/p\u003e\n\u003cp data-start=\"3007\" data-end=\"3386\"\u003e\u003cstrong data-start=\"3007\" data-end=\"3059\"\u003eQ: Which BMW models use part number 12217801200?\u003c\/strong\u003e\u003cbr data-start=\"3059\" data-end=\"3062\"\u003eThis glow plug control relay fits various diesel-powered BMW models — including many 1, 3, 5, 6, and 7 Series, as well as X3\/X5 vehicles — that specify \u003cstrong data-start=\"3214\" data-end=\"3229\"\u003e12217801200\u003c\/strong\u003e for their glow plug system control. Always verify compatibility with your VIN or existing part number before ordering. \u003c\/p\u003e\n\u003cp data-start=\"3388\" data-end=\"3652\"\u003e\u003cstrong data-start=\"3388\" data-end=\"3429\"\u003eQ: Is this part a direct replacement?\u003c\/strong\u003e\u003cbr data-start=\"3429\" data-end=\"3432\"\u003eYes. This control unit is a direct replacement for the original glow plug relay with OEM number \u003cstrong data-start=\"3528\" data-end=\"3543\"\u003e12217801200\u003c\/strong\u003e, designed to match the factory electrical and mounting specifications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.onlinecarparts.co.uk\/oenumber\/12217801200.html?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.onlinecarparts.co.uk\/oenumber\/12217801200.html?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-[15ch] grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3654\" data-end=\"3952\"\u003e\u003cstrong data-start=\"3654\" data-end=\"3697\"\u003eQ: Do I need professional installation?\u003c\/strong\u003e\u003cbr data-start=\"3697\" data-end=\"3700\"\u003eInstallation requires access to the engine’s glow plug wiring harness and relay location. While experienced DIYers may complete the replacement, professional installation is recommended to ensure correct connections and avoid potential ECU fault codes.\u003c\/p\u003e","brand":"globalcarpart.com","offers":[{"title":"Default Title","offer_id":56438143975801,"sku":"TB12217801200_94","price":79.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/4740\/1441\/files\/TB12217801200_7.jpg?v=1767687085","url":"https:\/\/www.globalcarpart.com\/products\/glow-plug-control-unit-relay-bmw-12217801200","provider":"globalcarpart.com","version":"1.0","type":"link"}