Glow plug control relay assembly 12217786821 macro shot
BMW glow plug control relay 12217786821 side angle image
Diesel glow plug ECU relay 12217786821 automotive part
Glow plug control unit for BMW 12217786821 close detail
BMW glow plug relay replacement part product shot
Glow plug relay electrical module 12217786821 rear connector view
BMW diesel pre-heater glow plug relay 12217786821 view
Glow plug control relay assembly 12217786821 macro shot
BMW glow plug control relay 12217786821 side angle image
Diesel glow plug ECU relay 12217786821 automotive part
Glow plug control unit for BMW 12217786821 close detail
BMW glow plug relay replacement part product shot
Glow plug relay electrical module 12217786821 rear connector view
BMW diesel pre-heater glow plug relay 12217786821 view

Glow Plug Control Unit Relay For BMW 12217786821

Sale price €94,30
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Glow plug control relay assembly 12217786821 macro shot

Glow Plug Control Unit Relay For BMW 12217786821

Availability: In stock SKU: TB12217801201_313
Categories: ALL Products
Glow plug control relay assembly 12217786821 macro shot

Glow Plug Control Unit Relay For BMW 12217786821

€94,30

Check part compatibility by using our vehicle filter options below. If you find your car, this part is compatible.

The glow plug control unit relay (OEM 12217786821) is a vital engine electrical component designed to regulate the electrical current supplied to the glow plugs on diesel-powered BMW vehicles. This relay works in conjunction with the vehicle’s engine control unit (ECU) to ensure each glow plug receives the correct power and timing during start-up, which is essential for efficient combustion and reliable cold starts. A failing or degraded relay can result in hard starts, long crank times, increased white smoke, and glow plug system warning lights. This replacement control unit is engineered to match the original BMW specification, providing dependable cold-start performance and helping maintain smooth engine operation in variable climates.

OEM Number: 12217788327, 12217801201, 7788327

Operating Mode : Electric

Voltage : 12V

Number of Cylinders : 6 for left-hand/right-hand drive vehicles

Number of connectors : 2

Number of Pins : 1+12

Quantity : 1

Make Model Variant Type Engine Chassis Year
BMW 3 Series Diesel Convertible 325d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E93 2007-2010
BMW 3 Series Diesel Convertible 325d 2993cc 155KW 211HP M57 D30 (306D3) RWD -- E93 2007-2010
BMW 3 Series Diesel Convertible 330Cd 2993cc 150KW 204HP M57 D30 (306D2) RWD -- E46 2005-2007
BMW 3 Series Diesel Convertible 330d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E93 2007-2013
BMW 3 Series Diesel Coupe 325d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E92 2007-2010
BMW 3 Series Diesel Coupe 325d 2993cc 155KW 211HP M57 D30 (306D3) RWD -- E92 2007-2010
BMW 3 Series Diesel Coupe 330Cd 2993cc 150KW 204HP M57 D30 (306D2) RWD -- E46 2003-2006
BMW 3 Series Diesel Coupe 330d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E92 2006-2008
BMW 3 Series Diesel Coupe 330xd 2993cc 170KW 231HP M57 D30 (306D3) AWD -- E92 2006-2008
BMW 3 Series Diesel Coupe 335d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E92 2006-2013
BMW 3 Series Diesel Estate 325d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E91 2006-2012
BMW 3 Series Diesel Estate 330d 2926cc 135KW 184HP M57 D30 (306D1) RWD -- E46 1999-2005
BMW 3 Series Diesel Estate 330d 2993cc 150KW 204HP M57 D30 (306D2) RWD -- E46 2003-2005
BMW 3 Series Diesel Estate 330d 2993cc 155KW 211HP M57 D30 (306D3);N57 D30 A RWD -- E91 2005-2012
BMW 3 Series Diesel Estate 330d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E91 2004-2008
BMW 3 Series Diesel Estate 330xd 2926cc 135KW 184HP M57 D30 (306D1) AWD -- E46 2000-2003
BMW 3 Series Diesel Estate 330xd 2993cc 150KW 204HP M57 D30 (306D2) AWD -- E46 2002-2005
BMW 3 Series Diesel Estate 330xd 2993cc 170KW 231HP M57 D30 (306D3) AWD -- E91 2005-2012
BMW 3 Series Diesel Estate 335d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E91 2006-2012
BMW 3 Series Diesel Saloon 325d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E90 2006-2010
BMW 3 Series Diesel Saloon 330d 2926cc 135KW 184HP M57 D30 (306D1) RWD -- E46 1999-2005
BMW 3 Series Diesel Saloon 330d 2993cc 150KW 204HP M57 D30 (306D2) RWD -- E46 2003-2005
BMW 3 Series Diesel Saloon 330d 2993cc 155KW 211HP M57 D30 (306D3);N57 D30 A RWD -- E90 2005-2011
BMW 3 Series Diesel Saloon 330d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E90 2005-2008
BMW 3 Series Diesel Saloon 330xd 2926cc 135KW 184HP M57 D30 (306D1) AWD -- E46 2000-2003
BMW 3 Series Diesel Saloon 330xd 2993cc 150KW 204HP M57 D30 (306D2) AWD -- E46 2002-2004
BMW 3 Series Diesel Saloon 330xd 2993cc 170KW 231HP M57 D30 (306D3) AWD -- E90 2005-2008
BMW 3 Series Diesel Saloon 335d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E90 2006-2011
BMW 5 Series Diesel Estate 525d 2497cc 120KW 163HP M57 D25 (256D2) RWD -- E61 2004-2007
BMW 5 Series Diesel Estate 525d 2497cc 130KW 177HP M57 D25 (256D2) RWD -- E61 2004-2007
BMW 5 Series Diesel Estate 525d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E61 2007-2010
BMW 5 Series Diesel Estate 525d xDrive 2993cc 145KW 197HP M57 D30 (306D3) AWD -- E61 2008-2010
BMW 5 Series Diesel Estate 525xd 2993cc 145KW 197HP M57 D30 (306D3) AWD -- E61 2007-2008
BMW 5 Series Diesel Estate 530d 2993cc 155KW 211HP M57 D30 (306D2);M57 D30 (306D3) RWD -- E61 2004-2010
BMW 5 Series Diesel Estate 530d 2993cc 160KW 218HP M57 D30 (306D2) RWD -- E61 2004-2005
BMW 5 Series Diesel Estate 530d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E61 2005-2007
BMW 5 Series Diesel Estate 530d 2993cc 173KW 235HP M57 D30 (306D3) RWD -- E61 2007-2010
BMW 5 Series Diesel Estate 530d xDrive 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E61 2007-2010
BMW 5 Series Diesel Estate 530xd 2993cc 170KW 231HP M57 D30 (306D3) AWD -- E61 2005-2007
BMW 5 Series Diesel Estate 530xd 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E61 2007-2007
BMW 5 Series Diesel Estate 535d 2993cc 200KW 272HP M57 D30 (306D4) RWD -- E61 2004-2010
BMW 5 Series Diesel Estate 535d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E61 2007-2010
BMW 5 Series Diesel Saloon 525d 2497cc 120KW 163HP M57 D25 (256D2) RWD -- E60 2004-2010
BMW 5 Series Diesel Saloon 525d 2497cc 130KW 177HP M57 D25 (256D2) RWD -- E60 2004-2010
BMW 5 Series Diesel Saloon 525d 2993cc 145KW 197HP M57 D30 (306D3) RWD -- E60 2007-2010
BMW 5 Series Diesel Saloon 525d xDrive 2993cc 145KW 197HP M57 D30 (306D3) AWD -- E60 2008-2009
BMW 5 Series Diesel Saloon 525xd 2993cc 145KW 197HP M57 D30 (306D3) AWD -- E60 2007-2008
BMW 5 Series Diesel Saloon 530d 2993cc 155KW 211HP M57 D30 (306D2);M57 D30 (306D3) RWD -- E60 2002-2009
BMW 5 Series Diesel Saloon 530d 2993cc 160KW 218HP M57 D30 (306D2) RWD -- E60 2002-2005
BMW 5 Series Diesel Saloon 530d 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E60 2005-2007
BMW 5 Series Diesel Saloon 530d 2993cc 173KW 235HP M57 D30 (306D3) RWD -- E60 2007-2009
BMW 5 Series Diesel Saloon 530d xDrive 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E60 2007-2009
BMW 5 Series Diesel Saloon 530xd 2993cc 170KW 231HP M57 D30 (306D3) AWD -- E60 2005-2007
BMW 5 Series Diesel Saloon 530xd 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E60 2007-2007
BMW 5 Series Diesel Saloon 535d 2993cc 200KW 272HP M57 D30 (306D4) RWD -- E60 2004-2010
BMW 5 Series Diesel Saloon 535d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E60 2007-2010
BMW 6 Series Diesel Convertible 635d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E64 2007-2010
BMW 6 Series Diesel Coupe 635d 2993cc 210KW 286HP M57 D30 (306D5) RWD -- E63 2007-2010
BMW 7 Series Diesel Saloon 730d 2993cc 155KW 211HP M57 D30 (306D2);M57 D30 (306D3) RWD -- E65,E66,E67 2003-2008
BMW 7 Series Diesel Saloon 730d 2993cc 160KW 218HP M57 D30 (306D2) RWD -- E65,E66,E67 2002-2005
BMW 7 Series Diesel Saloon 730Ld 2993cc 170KW 231HP M57 D30 (306D3) RWD -- E65,E66,E67 2005-2008
BMW X3 Diesel SUV 3.0d 2993cc 150KW 204HP M57 D30 (306D2) AWD -- E83 2004-2005
BMW X3 Diesel SUV 3.0d 2993cc 160KW 218HP M57 D30 (306D3) AWD -- E83 2005-2008
BMW X3 Diesel SUV 3.0sd 2993cc 210KW 286HP M57 D30 (306D5) AWD -- E83 2006-2008
BMW X3 Diesel SUV 30d xDrive 2993cc 155KW 211HP M57 D30 (306D3) AWD -- E83 2008-2010
BMW X3 Diesel SUV 30d xDrive 2993cc 160KW 218HP M57 D30 (306D3) AWD -- E83 2008-2010
BMW X3 Diesel SUV 35d xDrive 2993cc 210KW 286HP M57 D30 (306D5) AWD -- E83 2008-2011
BMW X5 Diesel SUV 3.0 3.0d 2993cc 155KW 211HP M57 D30 (306D3) AWD -- E70 2007-2008
BMW X5 Diesel SUV 3.0d 2925cc 135KW 184HP M57 D30 (306D1) AWD -- E53 2001-2003
BMW X5 Diesel SUV 3.0d 2993cc 155KW 211HP M57 D30 (306D2) AWD -- E53 2003-2006
BMW X5 Diesel SUV 3.0d 2993cc 160KW 218HP M57 D30 (306D2) AWD -- E53 2003-2006
BMW X5 Diesel SUV 3.0d 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E70 2006-2008
BMW X5 Diesel SUV 3.0sd 2993cc 210KW 286HP M57 D30 (306D5) AWD -- E70 2007-2008
BMW X5 Diesel SUV 30d xDrive 2993cc 155KW 211HP M57 D30 (306D3);N57 D30 A AWD -- E70 2008-2013
BMW X5 Diesel SUV 30d xDrive 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E70 2008-2010
BMW X5 Diesel SUV 35d xDrive 2993cc 210KW 286HP M57 D30 (306D5) AWD -- E70 2008-2013
BMW X6 Diesel SUV 30d xDrive 2993cc 173KW 235HP M57 D30 (306D3) AWD -- E71,E72 2008-2010
BMW X6 Diesel SUV 35d xDrive 2993cc 210KW 286HP M57 D30 (306D5) AWD -- E71,E72 2008-2010
Make Model Variant Type Engine Chassis Year


Our SKU: TB12217801201_313

All our Glow Plug Control Unit Relay For BMW 12217786821 are OEM quality and reliable after market car parts. This Glow Plug Control Unit Relay For BMW 12217786821 is specifically compatible with BMW: 3 Series, 5 Series, 6 Series, 7 Series, X3, X5, X6, .

Please 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.

If 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 & shipping guide here.

Key Benefits

Regulates Glow Plug Electrical Current Precisely
The relay ensures glow plugs receive consistent and correct current based on ECU signals, supporting effective pre-heating of combustion chambers for optimal starting performance.

Restores Cold-Start Reliability
Replacing a faulty or worn glow plug control unit can significantly improve engine start-up behaviour, particularly in colder conditions where proper pre-heating is critical.

Direct OEM Replacement (12217786821)
Manufactured to meet BMW’s original specifications, this relay fits directly in place of the original unit with OEM reference 12217786821 and requires no modification for correct installation.

Supports Diesel Combustion Efficiency
Reliable glow plug control helps promote smoother combustion immediately after start-up, which can improve fuel efficiency, reduce white smoke emissions, and support overall engine performance.

Compatible with Multiple BMW Models
This relay is commonly used on diesel BMW models equipped with engines requiring part number 12217786821, including various 1 Series, 3 Series, and X-Series vehicles. Always confirm OEM part fitment using your VIN or existing component reference.

Frequently Asked Questions (FAQs)

Q: What does a glow plug control unit relay do?
A glow plug control unit relay manages the electrical current and timing delivered to the glow plugs during engine start-up, enabling effective pre-heating of cylinders to ensure smooth diesel ignition.

Q: What are common symptoms of a failing glow plug relay?
Typical signs include difficulty starting the engine, long crank times (especially in cold weather), glow plug warning lights or engine warning lights on the dashboard, rough idle after start-up, and increased white smoke from the exhaust.

Q: Which vehicles use part number 12217786821?
Part number 12217786821 is used on a range of BMW diesel models — often within 1 Series, 3 Series, X1, X3 and other vehicles equipped with certain 4-cylinder diesel engines. Always check compatibility with your specific VIN or existing part number.

Q: Is this a direct replacement part?
Yes. This glow plug control unit relay is designed as a direct OEM replacement for the original 12217786821 relay and installs without modification when matched to the correct application.

Q: Should I replace glow plugs at the same time?
It is good practice to inspect the glow plugs and related wiring when servicing the relay, as worn glow plugs or poor wiring connections can contribute to cold-start issues even if the relay is functioning correctly.

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    Warranty Coverage: Eligibility: To be eligible for 10-year warranty coverage, the car part must be fitted by a certified professional mechanic. Proof of fitment, including the mechanic's certification, must be submitted to Amesplan LTD within 30 days of the part's purchase date. Please send supporting documentation to us via email.In case a purchased product becomes faulty during its warranty period, for reasons unrelated to your acts, omissions or misuse of the goods, you must promptly notify us and fill out a warranty claim form. 

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