More BMW M14 Wheel Hub Conversion Kit - 31207857506KT1
Genuine BMW
SKU: KIT-31207857506KT1

BMW M14 Wheel Hub Conversion Kit - 31207857506KT1

E90 M3, E92 M3, E93 M3

Includes wheel hubs from the F8X M3/4 which allows for an easy upgrade to larger M14-sized wheel hardware, studs included are 90mm long, ideal for cars running wheel spacers up to 10mm

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Price each: $1,616.27
Core charges are assigned to parts that have reusable components by manufacturers to encourage the return of the used units. Once you return the old part you will be refunded for your core charge, details regarding the return will be emailed to you once you place the order. Note: The customer is responsible for the cost of return shipping.
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Description

Details

SKU:
KIT-31207857506KT1
FCP Euro ID:
Quality:
Genuine

OE Numbers

31207857506, 33402283220, 33416775842, 33416762321, 33416762322, 07119934755, 33411133785, 33410412955, 14X12590MMBBS, 14X125BLKCSN, 24200, 96144A307, 91455A614, 93501A113

MFG Numbers

805560A, 07119934755, 12181, 14X125-90MM-BBS, 14X125-BLK-CSN, 24200, 96144A307, 91455A614, 93501A113

This Kit Includes

Qty Part SKU Brand Price
2 Wheel Bearing and Hub Assembly BMW-31207857506 $828.22
2 Wheel Hub BMW-33402283220 $348.82
2 Wheel Bearing FAG-805560A $111.16
2 Wheel Bearing Snap Ring BMW-07119934755 $4.58
2 Axle Nut FEB-12181 $15.48
20 Wheel Lug Stud MSH-14X12590MMBBS $171.80
20 Wheel Lug Nut MSH-14X125BLKCSN $73.80
1 Thread Locker PMX-24200 $9.29
8 Wheel Bearing Bolt OES-96144A307 $38.80
8 Wheel Bearing Washer OES-91455A614 $7.92
8 Lock Washer OES-93501A113 $6.40

Product Information

One of the better-known problems on E chassis BMW's is the M12-sized wheel hardware is not up to snuff for extreme/hard use. Wheel stud failure is a known problem on BMW chassis cars using M12 hardware for track use where maintenance is not being considered. Wheel hardware should be replaced often and is considered a wear item for vehicles that see lots of track time.

BMW fixed the wheel hardware issue by upgrading to M14 sized hardware on the BMW F chassis cars. The size difference in wheel hardware adds 17% more material in the place that it is really needed. For the E9X M3 you can add M14 hardware by changing the wheel hubs to those from the F8X M3/M4.

The front wheel hub assemblies and rear wheel hubs are more or less plug and play onto the E9X M3. Included in this kit is the hardware needed for installation including the F8X M3 front wheel hub assemblies which require different mounting hardware than stock due to the thread pitch change on the wheel hub mounting flange itself. For this, we opted to use M12x1.25mm cap bolts that meet DIN912 standard (typically used for race cars), class 10.9 zinc plated washers, and Schnorr safety lock washers for the cap bolts.

Motorsport Hardware 90mm studs and nuts are also included in the package to round everything out. Please note that some brake rotors may require the lug holes to be opened up to accommodate the larger wheel hardware.

Wheel Bearing Kit

Wheel bearings support the vehicle's weight and reduce rotational friction, located within the wheel hub/spindle. European car manufacturers typically use three types of wheel bearings: unsealed, sealed press-in, and wheel bearing/hub assemblies.

Unsealed bearings, common in pre-1990 cars, require regular greasing, while sealed bearings, used from the 1990s onward, are maintenance-free and must be replaced when worn. The most modern approach integrates the wheel bearing into the hub assembly, simplifying replacement by bolting in a new unit.

Signs of failure include a grinding noise, which worsens over time. Diagnosing involves lifting the car to check for wheel play and noise. Replacement processes differ: unsealed bearings need cleaning and proper alignment, sealed bearings require pressing out, and hub assemblies are straightforward to unbolt and replace. Correct torque application is vital for all types to prevent premature failure.

Wheel Bearing Kit Failure Symptoms
  • Grinding or growling: A bad wheel bearing will first reveal itself by making a growling or grinding noise when unloaded, IE if turning right, the right side will make noise. Eventually, as it gets worse, so will the sound until it’s replaced
  • Play in the wheel: With the wheel off the ground, you will detect play from a worn wheel bearing. This is because the internal bearings have worn away and are no longer perfectly tight.
  • Vibration or wobble: While much less frequent, if a wheel bearing is very bad or has an excessive amount of play in it, it will cause issues with the vehicle's handling, including vibration or wobble noticeably through the steering wheel.
  • Uneven Tire Wear: A faulty Wheel Bearing can adversely affect tire wear and cause uneven wear across the tire contact patch.
  • ABS warning light: If you are chasing an ABS issue and you have sorted out the sensors, it’s not impossible that damage has occurred to the ABS tone ring inside of the wheel bearing. If you have a single corner fault but the ABS sensor checks out, replace the wheel bearing and in turn the tone ring.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.

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