Flywheel - BMW E46 M3 / Z4 M Coupe M Roadster
SKU: 25539222941

Flywheel - BMW E46 M3 / Z4 M Coupe M Roadster

Sale price$405.00 Regular price$450.00
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Description

Flywheel - BMW E46 M3 / Z4 M Coupe M RoadsterLuK dual mass flywheels absorb engine vibrations before they are transmitted to the driveline where they can create gear rattle. These units feature a built in damper designed to isolate engine torque spikes and prevent transmission damage. By design, dual mass flywheels cannot be resurfaced. This all makes the LuK dual mass flywheel the ideal solution. With one drawback: the higher the mass reactance of the vibrating masses, the more excessive the


LuK dual-mass flywheels absorb engine vibrations before they are transmitted to the driveline where they can create gear rattle.

These units feature a built-in damper designed to isolate engine torque spikes and prevent transmission damage. By design, dual-mass flywheels cannot be resurfaced.

This all makes the LuK dual mass flywheel the ideal solution.
With one drawback: the higher the mass reactance of the vibrating masses, the more excessive the resonance increase and associated torque peaks. With the dual mass flywheel, this would be easily perceived when starting and stopping the engine; much more easily than with a conventional clutch system. Additionally: the smaller flymass of the engine has less of a stabilizing effect on the speed fluctuation of the engine.

Thanks to decades of experience in clutch building, the LuK specialists were able to find an excellent solution to this problem. An additional damping device effectively prevents resonance overload. In normal operation, however, this additional damping device has no function and the torsional vibrations of the engine are filtered out by spring dampers.

Friction and spring rate - the correct ratio is important.
For optimal vibration isolation and soft resonance passage when starting and stopping the engine, the ratio between friction and spring rate must be optimal. The length of the springs is a key factor: The softer a spring, the more efficiently vibrations are isolated. The extra-long springs of the latest generation of dual mass flywheels significantly reduce the spring rate compared to a first generation dual mass flywheel. In routine driving operations, excessive resonance increases are kept almost completely away from the gearbox.


Features and Benefits:

  • Top driving comfort
  • Absorbs vibrations
  • Prevents noise
  • Enables comfortable, low-revs driving
  • Saves fuel
  • Relieves crankshaft and gearbox


    OE Part #'s


    21-21-2-229-900 / 21 21 2 229 900 / 21212229900

    21-21-2-229-910 / 21 21 2 229 910 / 21212229910

    21-21-2-229-940 / 21 21 2 229 940 / 21212229940

    21-21-2-282-345 / 21 21 2 282 345 / 21212282345

    LuK Part #'s   DMF050 / 4150175100

            Shipping Notes
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            Exchange/Return Notes
            • We offer a 30-day return/exchange service after receiving.
            • Final sale items are not eligible for returns or exchanges.
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            SKU: 25539222941

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            Kindle Customer
            Lexington, US
            ★★★★★ 2
            Nice but runs small
            Size: 7 Big Kid, Color: Navy
            The sandals are nice and not to hard or flimsy but they are cut very small.
            WAS THIS REVIEW HELPFUL?YesReportShare
            Reviewed in the United States on April 22, 2026
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            Alexandria Knox
            Chelsea, US
            ★★★★★ 4
            Solid Kids Sandals, Overpriced Like Most Kids Shoes 🌞
            Size: 11 Little Kid, Color: Brown, Size: 11 Little Kid, Color: Brown
            My son hasn’t worn these yet since it’s December in Indiana and sandals + snow obviously don’t mix. 😂 So this review is based on first impressions rather than long term wear. That said, these seem wider than a lot of typical kids’ sandals, which I REALLY appreciate since we tend to have wider feet in our family. #hobbitfeet The quality feels pretty decent overall. They’re described as lightweight, and while they’re not insanely lightweight, they do have enough weight to feel semi-sturdy and not flimsy or cheap. I like the style and color, and I think they’ll work well for my son once warmer weather hits. My main complaint is the price. At just under $24 at the time of this review, it feels a little high for kids’ sandals and for what these are. I really feel like $20 MAX would make more sense. Kids shoes are almost always priced like adult shoes, even though they clearly use less material, and that’s hard for me to understand and wrap my mind around. Overall, these seem solid for daily wear, I just wish the price was a bit more reasonable and affordable.
            WAS THIS REVIEW HELPFUL?YesReportShare
            Reviewed in the United States on December 31, 2025
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            Job
            Belleville, US
            ★★★★★ 5
            Great basic and timeless design
            Size: 12 Little Kid, Color: Brown
            These sandals are a great find! They’re super easy to get on and off thanks to the Velcro straps, which is a huge win for little ones learning to be more independent. The fit is adjustable and secure, so they stay in place well during all kinds of play. The cork-style footbed is comfortable and gives good support, and the overall design feels sturdy enough to handle everyday wear. They’re lightweight but still durable, and have held up really well so far. They also have a classic, versatile look that goes with just about everything, perfect for summer outfits. Overall, a reliable, comfortable sandal that’s great for active kids. Would definitely buy again!
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            Reviewed in the United States on April 24, 2026
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            Nicole
            Birmingham, US
            ★★★★★ 5
            Great option for boys or girls
            Size: 13 Little Kid, Color: Black, Size: 13 Little Kid, Color: Black
            This is really more of a unisex option for a sandal. I have sandals that look like this, and both of my children have worn this style. I ordered these for my daughter, with the plan to pass them down to my son if they're not too worn when she outgrows them. The style is very minimalistic, so it goes with lots of outfits. All the straps are easily adjustable, so you can get a good fit. I would say the length is true to size, but the width is maybe a bit wide. Nevertheless, the adjustable straps really help them fit well. They feel really sturdy and I appreciate that the sole has cushion to it. My daughter has worn these every day since I got them out of the closet and they're holding up well.
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            Reviewed in the United States on February 19, 2026
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            Verified Purchase
            Kylat
            Whiting, US
            ★★★★★ 5
            Fast shipping
            Size: 5 Big Kid, Color: Black
            Good sandals, the kid just didn't want them. Fast shipping and easy returns!
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            Reviewed in the United States on June 11, 2026

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