SKU: 11782475671

Dual-Mass Clutch Flywheel - BMW / N20 / F3X

Sale price$501.30 Regular price$557.00
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Description

Dual-Mass Clutch Flywheel - BMW / N20 / F3XLUK is an OEM Flywheel manufacturer for BMW. 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


LUK is an OEM Flywheel manufacturer for BMW.  


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




    Part #'s


    21-20-7-638-306 / 21 20 7 638 306 / 21207638306


    LuK Part #   DMF154 / DMF 154 / DMF-154



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Exchange/Return Notes
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SKU: 11782475671

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J. M.
Birmingham, US
★★★★★ 5
LOVE IT! But let's clarify the color!
Color: Apricot, Size: 14 Inch
Hi! I bought the 14" backpack in apricot. A few things stand out to me: 1) High Quality-this is a quality-made product. 2) The Apricot color is closer to a light tan or light sand color. 3) It was not as wrinkled upon arrival as I read elsewhere. I do not intend to steam the wrinkles out. I don't see that as necessary and I hate wrinkles. It's beautiful! It's high-quality. It has every pocket and function you'd want. (see the videos.) Once I use it more, I'll add to my review if necessary. I love it. I'm happy a bought it and I think you would be too! Nice to get a product with such obvious quality!
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Reviewed in the United States on January 6, 2026
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Nicole
Cuba, US
★★★★★ 5
Great work bag!
Color: Black, Size: 14 Inch
Very nice quality, and compact enough to have my computer, 2 small notebooks, water bottle and office toiletry bag and still have space for a few other things
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Reviewed in the United States on March 24, 2026
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M
Lexington, US
★★★★★ 3
Cute and company, but packing makes it VERY wrinkled
Color: Black, Size: 16 Inch
The bag is really cute and designed so well, can't believe how spacious it is yet compact! Not bulky and doesn't take up much room, lots of pockets. Perfect for both fashion and function. Took off stars thought because it came folded in half in its package and it's VERY wrinkled. Kind of takes away from it's look and makes it look bad :( pretty major wrinkles everywhere and I'm not sure if it can come out in this material, though I will try ironing it. If the company shipped it better it would be 5 stars.
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Reviewed in the United States on July 2, 2025
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Vivian
Lowell, US
★★★★★ 5
Great stylish work backpack
Color: Black, Size: 16 Inch
I’ve had this backpack for a year and a half now and it has held up very well. I use it for work and work trips. It has many pockets for organization and fits everything I need including my 14 inch work laptop. Very stylish (not sporty) and appropriate for the office.
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Reviewed in the United States on October 26, 2025
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Itzel Zeledon
Whiting, US
★★★★★ 5
Stylish and usefull!
Color: Apricot, Size: 16 Inch
Great quality! i love the compartiments it has to organize all your stull, it is easy to carry and it doesnt get dirty easily.
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Reviewed in the United States on November 14, 2025

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