• MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502
  • MMR BMW Billet 90mm Coolant Expansion Cap MMR03-1502

MMX BMW Billet 90mm Coolant Expansion Cap

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WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.

Upgrade your BMW’s engine bay with the MMX Performance 90mm Billet Coolant Expansion Cap (MMR03-1502), designed and engineered in the UK for superior performance and aesthetics. Crafted from 6061 aerospace-grade billet aluminum, this coolant cap combines durability and style, making it the perfect replacement for your factory cap.

Each cap is precision-engineered using CNC 5-axis technology, ensuring a flawless fit and finish. The cap undergoes a meticulous process of polishing and is finished with MMR's signature gloss black anodized coating, providing long-lasting protection against the elements and a sleek, high-end look under the hood.

Unlike other caps, this MMR Performance coolant cap comes pre-sealed with an OE-spec valve and internal spring, making it a true plug-and-play solution. There's no need to remove any components from your existing cap, as the OE replacement internals ensure optimal sealing and pressure regulation.

Designed for both form and function, this billet coolant expansion cap not only enhances your BMW's under-hood aesthetics but also offers an ergonomic design with ample surface grip, making installation and coolant refills hassle-free.

Key Features:

  • UK-engineered design for precision and durability
  • 6061 aerospace-grade billet aluminum construction
  • Full OE cap replacement, not just a cover
  • Sophisticated internal springing and bleed-off system for reliability
  • Gloss black anodized finish for a premium look
  • Pre-installed factory-spec Viton O-ring for optimal sealing
  • Perfect addition to the existing range of MMX billet caps

Fitment is for models with the matching OE (17 11 7 639 021) part number.

Year
Make
Model
Submodel
Engine
2004 - 2007
BMW
525i
Base
2.5
2006 - 2007
BMW
525i
Base
3.0
2006 - 2007
BMW
525xi
Base
3.0
2008 - 2011
BMW
528i
Base
3.0
2009 - 2010
BMW
528i xDrive
Base
3.0
2008
BMW
528xi
Base
3.0
2004 - 2007
BMW
530i
Base
3.0
2006 - 2007
BMW
530xi
Base
3.0
2008 - 2010, 2013
BMW
535i
Base
3.0
2011 - 2013
BMW
535i GT
Base
3.0
2013
BMW
535i GT
M Sport
3.0
2011 - 2013
BMW
535i GT xDrive
Base
3.0
2008
BMW
535xi
Base
3.0
2004 - 2005
BMW
545i
Base
4.4
2011 - 2013
BMW
550i
Base
4.4
2006 - 2010
BMW
550i
Base
4.8
2013
BMW
550i
M Sport
4.4
2010 - 2012
BMW
550i GT
Base
4.4
2011 - 2012
BMW
550i GT xDrive
Base
4.4
2011 - 2013
BMW
550i xDrive
Base
4.4
2012
BMW
640i
Base
3.0
2004 - 2005
BMW
645Ci
Base
4.4
2012
BMW
650i
Base
4.4
2006 - 2010
BMW
650i
Base
4.8
2012
BMW
650i
M Sport
4.4
2012
BMW
650i xDrive
Base
4.4
2011 - 2012
BMW
740i
Base
3.0
2012
BMW
740i
M Sport
3.0
2010 - 2012, 2016 - 2021
BMW
750i xDrive
Base
4.4
2011 - 2012
BMW
750Li
ActiveHybrid
4.4
2009 - 2012
BMW
750Li
Base
4.4
2009
BMW
750Li
Limited Edition
4.8
2009
BMW
750Li
Sport Limited Edition
4.8
2010 - 2012
BMW
750Li xDrive
Base
4.4
2010 - 2015
BMW
760Li
Base
6.0
2011 - 2012
BMW
Alpina B7
Base
4.4
2017 - 2021
BMW
Alpina B7
xDrive
4.4
2011 - 2012
BMW
Alpina B7 xDrive
Base
4.4
2011 - 2012
BMW
Alpina B7L
Base
4.4
2011 - 2012
BMW
Alpina B7L xDrive
Base
4.4
2021 - 2022
BMW
Alpina XB7
Base
4.4
2019 - 2021
BMW
M2
Competition
3.0
2020 - 2021
BMW
M2
CS
3.0
2015 - 2018
BMW
M3
Base
3.0
2008 - 2013
BMW
M3
Base
4.0
2015 - 2021
BMW
M4
Base
3.0
2021
BMW
M4
Competition
3.0
2021
BMW
M4
Competition xDrive
3.0
2018 - 2020
BMW
M4
CS
3.0
2016
BMW
M4
GTS
3.0
2018 - 2022
BMW
M5
Base
4.4
2006 - 2010
BMW
M5
Base
5.0
2019 - 2022
BMW
M5
Competition
4.4
2022
BMW
M5
CS
4.4
2019
BMW
M5
First Edition
4.4
2006 - 2010
BMW
M6
Base
5.0
2018 - 2021
BMW
M760i xDrive
Base
6.6
2020
BMW
M8
Base
4.4
2020
BMW
M8
Competition
4.4
2020 - 2021
BMW
M8 Gran Coupe
Base
4.4
2020 - 2022
BMW
M8 Gran Coupe
Competition
4.4
2020 - 2022
BMW
M850i xDrive Gran Coupe
Base
4.4
2007 - 2009
BMW
X5
3.0si
3.0
2007 - 2009
BMW
X5
4.8i
4.8
2014 - 2016
BMW
X5
Base
3.0
2014 - 2016
BMW
X5
Base
4.4
2011 - 2012
BMW
X5
M
3.0
2010 - 2018, 2020 - 2021
BMW
X5
M
4.4
2020 - 2021
BMW
X5
M Competition
4.4
2014 - 2016
BMW
X5
M Sport
3.0
2015 - 2016
BMW
X5
M Sport
4.4
2020 - 2021
BMW
X5
M50i
4.4
2014 - 2018
BMW
X5
sDrive35i
3.0
2020 - 2021
BMW
X5
sDrive40i
3.0
2009 - 2013
BMW
X5
xDrive30i
3.0
2011 - 2013
BMW
X5
xDrive30i
4.4
2009 - 2010
BMW
X5
xDrive30i M Sport
3.0
2009 - 2018
BMW
X5
xDrive35d
3.0
2011 - 2018
BMW
X5
xDrive35i
3.0
2011 - 2013
BMW
X5
xDrive35i
4.4
2017 - 2018
BMW
X5
xDrive35i M Sport
3.0
2016 - 2018
BMW
X5
xDrive40e
2.0
2019 - 2021
BMW
X5
xDrive40i
3.0
2019 - 2020
BMW
X5
xDrive40i M Sport
3.0
2021
BMW
X5
xDrive45e
3.0
2009 - 2010
BMW
X5
xDrive48i
4.8
2009 - 2010
BMW
X5
xDrive48i M Sport
4.8
2011 - 2020
BMW
X5
xDrive50i
4.4
2017 - 2020
BMW
X5
xDrive50i M Sport
4.4
2010 - 2011
BMW
X6
ActiveHybrid
4.4
2015 - 2016
BMW
X6
Base
3.0
2015 - 2016
BMW
X6
Base
4.4
2011 - 2013
BMW
X6
M
3.0
2010 - 2019
BMW
X6
M
4.4
2015 - 2016
BMW
X6
M Sport
3.0
2015 - 2016
BMW
X6
M Sport
4.4
2015 - 2019
BMW
X6
sDrive35i
3.0
2008 - 2019
BMW
X6
xDrive35i
3.0
2013
BMW
X6
xDrive35i M Performance
3.0
2017, 2019
BMW
X6
xDrive35i M Sport
3.0
2008 - 2019
BMW
X6
xDrive50i
4.4
2013
BMW
X6
xDrive50i M Performance
4.4
2017, 2019
BMW
X6
xDrive50i M Sport
4.4
2009 - 2010
BMW
X6
xDrive50iA
4.4
2020 - 2021
BMW
X7
M50i
4.4
2019 - 2021
BMW
X7
xDrive40i
3.0
2019 - 2020
BMW
X7
xDrive40i M Sport
3.0
2020
BMW
X7
xDrive40i M Sport
4.4
2019 - 2020
BMW
X7
xDrive40i Pure Excellence
3.0
2019 - 2020
BMW
X7
xDrive50i
4.4
2019
BMW
X7
xDrive50i M Sport
4.4
2019 - 2020
BMW
X7
xDrive50i Pure Excellence
4.4
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