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Description
BMW Misfire N54 Engine MSD80 DME Repair & MOSFET Upgrade Kit - Fix Engine FaultsRepair and improvement kit for BMW Siemens DME MSD80 MSD81 injection computer: OEM IRF W644B transistors. This ECU is used in many BMW 2006 2013 vehicles with N54 or N54T 6 cylinder turbo engine. The DME MSD80 MSD81 computer is fitted to the following vehicles: BMW 135i 2007 2013 (E82) BMW 335i 2007 2008 (E90) BMW 335xi 2007 2008 (E91) BMW 335i 2007 2010 (E92) BMW 335i 2007 2010 (E93) BMW 535i and 535xi (E60) 2009 2010 BMW Z4 35i 2009 2016 (E89)
Repair and improvement kit for BMW Siemens DME MSD80 / MSD81 injection computer: OEM IRF W644B transistors.
This ECU is used in many BMW 2006-2013 vehicles with N54 or N54T 6 cylinder turbo engine.
The DME MSD80 / MSD81 computer is fitted to the following vehicles:
BMW 135i 2007-2013 (E82)
BMW 335i 2007-2008 (E90)
BMW 335xi 2007-2008 (E91)
BMW 335i 2007-2010 (E92)
BMW 335i 2007-2010 (E93)
BMW 535i and 535xi (E60) 2009-2010
BMW Z4 35i 2009-2016 (E89)
Typical fault symptoms:
Supply problem of one or more injectors
Intermittent starting problem
Engine runs on certain cylinders only
Vehicle does not start
Fault codes indicated by the diagnostic case:
30BA - DME Digital Motor Electronics, Internal Fault
30BB - DME Digital Motor Electronics, Internal Fault
29D0 - Cylinder 4 Misfire
29D1 - Cylinder 5 Misfire
29D2 - Cylinder 6 Misfire
29CD - Cylinder 1 Misfire
29CE - Cylinder 2 Misfire
29CF - Cylinder 3 Misfire
29CC - Multiple cylinder misfire
29D9 - Misfire with low fuel level
All of these symptoms most likely mean that the MOSFET transistors located in your vehicle's injection computer module are faulty.
Using our repair kit, you can permanently repair the Siemens MSD80 / MSD81 injection computer yourself at a lower cost.
The Siemens DME MSD80 / MSD81 BMW ECU repair kit includes:
OEM IRF W644B transistors
Please note that all 6 original W644B transistors, even if they are in good condition, must be replaced with new transistors.
Part Numbers: 7546141 7550014 7565859 7565860 7567229 7567232 7567491 7567492 7567542 7567543 7568370 7568371 7568842 7568843 7569978 7569979 7571468 7571469 7572063 7572064 7572067 7572068 7573796 7573797 7573863 7573864 7574534 7574535 7575875 7575876 7576719 7576720 7576721 7576722 7578020 7578021 7578441 7578442 7583332 7583333 7586938 7586939 7586940 7586954 7588620 7588621 7594305 7594306 7595235 7595236 7596017 7596018 7611396 7611397
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★★★★★ 5
Gorgeous!
Color: 01.Heart Cut, Style: 04. April (Diamond)
I love this necklace! I wanted something that represented my birthstone, but did not cost a fortune and could be easily replaced if it’s ever lost. I have very sensitive skin. Seriously, I’m even allergic to gold unless it’s pure. This necklace is perfect. The chain hasn’t bothered the skin on my neck since I put it on. The size is perfect for me. It sits exactly where I want it to. The pendant is a true Goldilocks - not too big, not too small, but just right! I love the way it looks in the sun! Sparkles, sparkles, sparkles! This is definitely going to be my go to, everyday piece. I highly recommend this to anyone who is even a little bit interested in buying it. You won’t be disappointed. It makes a wonderful gift for ladies and girls of all ages, or simply as a treat to yourself! Choose your birthstone or your favorite color! In fact, I’m considering which color to purchase next. Can’t say enough how much I am in love with this amazing piece!
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Reviewed in the United States on August 1, 2019
★★★★★ 5
Great gift 🎁
Color: 03.Pear Cut, Style: 02. February(Amethyst)
It was perfect for my daughter. Light weight and as described. It looks great
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Reviewed in the United States on February 4, 2026
★★★★★ 4
Sparkling ✨️ Pretty
Color: 02.Round Cut, Style: 04. April (Diamond)
The chain is very nice, can adjust it to 16 to 18inches. Appears to be 925 sterling sliver. The diamond charm is about a diime in size. It's sparkling and pretty. I can't decide if the charm is to big or not for me. All in all 40. Spent on it was ok but no more.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Nice necklace
Color: 01.Heart Cut, Style: 05. May (Emerald)
Very nice quality. Perfect for a young lady.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Love necklace
Color: 02.Round Cut, Style: 12. December(Tanzanite)
This was given as a gift and my sister loved it.
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Reviewed in the United States on April 13, 2026