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016921LA09 - ECS Billet Rear Sway Bar Brackets With Polyurethane Bushings - Pair - E9x Non-M, E46, E53

ECS Billet Rear Sway Bar Brackets With Polyurethane Bushings - Pair - E9x Non-M, E46, E53

ECS

T#: 3443018 | Part#: 016921LA09

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For use with Aftermarket 23mm rear sway bar

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SALE: $99.89 (10% OFF)

WAS: $110.99 on 05-03-2026

This product was last offered at the strikethrough price on
05-03-2026

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On Order

Est. Ship Date:

on Jul 28, 2026

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Product Details

The ECS Tuning Billet Rear Sway Bar Mounting Kit was designed, engineered, tested and quality inspected thanks by their Research and Development team in Wadsworth, Ohio facility. ECS ensures that the highest level of precision and quality is delivered throughout rigorous long term product testing and leading edge product development methods. This kit provides your vehicle with a more rigid mounting solution from the sway bar to chassis than the OEM steel brackets. With an improved sway bar mounting bracket and the included polyurethane sway bar bushings, you can expect to achieve an increase in rear sway bar effectiveness and less body roll as a result.

Features and Design:

The rear sway bar mounting brackets are made from a chunk of 6061-T6 billet aluminum that are precision CNC-machined to bolt into the OEM mounting location while utilizing greaseable, polyurethane bushings. They are Type II black anodized for corrosion protection and include zinc flake coated Class 12.9 alloy steel bolts for premium performance.
The red polyurethane bushings feature a greasable channel for extended service life and quieter operation than standard polyurethane bushings.
With ECS billet & poly mounts replacing the OEM steel & rubber configuration you can expect faster reaction speed and greater effectiveness from your rear sway bar due to less deflection. This translates to better handling with sharper, flatter cornering with reduced body roll.
Installation is simple. Simply unbolt your rear sway bar mounting brackets and slip over ECS poly bushings and billet mounting brackets with the included hardware. That's it! Enjoy better handling and a crisp rear suspension.
SPECIAL NOTE: Fitment is tight against the ECS sway bar stops. Simply push and hold into position to start the mounting bolts and then torque to factory specifications. You can use any conventional automotive bearing grease for service.

Prop 65 Warning

Cross Reference

33556780707

Kit Contents

Qty	Description	T#	Part#	Lifetime
4	Genuine BMW Torx Screw - 07119907125	T#27935	07119907125	YES
2	Polyurethane Sway Bar Bushing - Each - 23mm - Red	T#1918444	5338R	YES
1	E9XNM Heavy Duty Rear Sway Bar Bracket	T#3858151	016921LA01~A	YES

Product Q&A

Lifetime Replacement

This Product Is Covered By Our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

Fits These Cars

MAKE	MODEL	SUBMODEL	ENGINE	Special Fitment Notes
BMW	E46	M3	S54 3.2L	Use vehicle selector to confirm fitment
BMW	E53	X5	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E53	X5	M62 4.4L	Use vehicle selector to confirm fitment
BMW	E53	X5	M62 4.6L	Use vehicle selector to confirm fitment
BMW	E53	X5	N62 4.4L	Use vehicle selector to confirm fitment
BMW	E53	X5	N62 4.8L	Use vehicle selector to confirm fitment
BMW	E82	128i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E82	135i	N54 3.0L	Use vehicle selector to confirm fitment
BMW	E82	135i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E83	X3	M54 2.5L	Use vehicle selector to confirm fitment
BMW	E83	X3	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E83	X3	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E84	X1 sDrive28i	N20 2.0L	Use vehicle selector to confirm fitment
BMW	E84	X1 xDrive28i	N20 2.0L	Use vehicle selector to confirm fitment
BMW	E84	X1 xDrive35i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E90	325i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E90	328i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E90	330i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E90	335d	M57 3.0L	Use vehicle selector to confirm fitment
BMW	E90	335i	N54 3.0L	Use vehicle selector to confirm fitment
BMW	E90	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E92	328i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E92	335i	N54 3.0L	Use vehicle selector to confirm fitment
BMW	E92	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E93	328i	N52 3.0L	Use vehicle selector to confirm fitment
BMW	E93	335i	N54 3.0L	Use vehicle selector to confirm fitment
BMW	E93	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	Z4	M Coupe	S54 3.2L	Use vehicle selector to confirm fitment
BMW	Z4	M Roadster	S54 3.2L	Use vehicle selector to confirm fitment

*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.

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ECS Billet Rear Sway Bar Brackets With Polyurethane Bushings - Pair - E9x Non-M, E46, E53

Product Details

Kit Contents

Product Q&A

Lifetime Replacement

This Product Is Covered By Our Lifetime Replacement Program

Fits These Cars