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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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Product Reviews
★★★★★ 5
Cute, different, and good quality
I had these for my kids when they were little. I am now buying them for my first grandchild. They appear to be the same good quality they were years ago. I highly recommend : )
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Reviewed in the United States on August 21, 2025
★★★★★ 5
Great shoes for the little one taking his/her first steps
Great shoes for the little one taking his/her first steps!! I actually ordered 2 pairs, one for my son in the 12-18 months (even tho he was 10 months old) and a 6-12 month for a friend. The 6-12 month fit my son perfect!! (my son was in a size 5) but I knew they would only last a few weeks so I kept the 12-18 month ones and he started wearing them. He seemed to like them, never tried taking them off and they were easier to walk in than socks but for some reason the top of the foot area is HUGE! They stayed on no problem but lots of wiggle room in the top... He is now running and wears shoes with a thicker sole for the rocks but we still love these for inside when it is too cold to go barefoot. I would say the 12-18 month fit like an average size 6.
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Reviewed in the United States on May 11, 2017
★★★★★ 5
Great barefoot option for early walkers!
Size: 12-18 Months Infant, Color: Grey
A moccasin is such a great place to start! Buying barefoot shoes can be hard.. they’re not always the cutest, can be expensive & there’s a lot to pay attention to! We love moccasins as a great first shoe for our boys. Perfect for summer because they’re more like a sandal & let in air flow.
Why we love:
✨Meets barefoot-style checklist
✨SUPER inexpensive
✨Quality made & last a long time
✨Lots of style & sizing options
✨Breathable
✨Easy to put on & take off
✨They protect feet all while still giving a sensory experience
These ones do run big, so size down. If you’re looking for a shoe that has more grip on the bottom, there are tons of moccasin style shoes with grip as well.
Give these a shot if you have a fresh walker on your hands!
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Reviewed in the United States on June 5, 2025
★★★★★ 5
Great shoes for first time walkers!
Size: 12-18 Months Infant, Color: Grey, Size: 12-18 Months Infant, Color: Grey
The material is great! My child likes it and hasn’t tried to take them off! They are lightweight and not bulky. Very flexible ! Also I did my research and it’s made in the UK and made with genuine leather! The color is cute as well! Wish they did have more variety here in Amazon but still okay with it!
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Cute, soft, comfy
Size: 6-12 Months Infant, Color: Navy
I wanted a leather sole shoe for my ten month old daughter for playing outside this summer so she could have protection for her feet without a hard “supportive” shoe inhibiting her ability to learn to balance or affecting her feet as the bones continue to develop.
These are perfect, they are soft and easy to put on. The elastic in the ankle holds it on without being too tight and it doesn’t dig into her skin at all. Provide protection and grip as she learns to walk and are not too bulky at all. I got the 9-12 month size and it has enough room to accommodate a chubbier foot than my daughter has, but still fits well and looks adorable.
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Reviewed in the United States on June 25, 2024