Introducing the CorkSport Rear Sway Bar for 2019+ Mazda 3 and CX-30. Improve your handling characteristics, reduce body roll, and reduce understeer by adding a sway bar to the rear of your GEN4. We tested multiple diameters and settled on a 7/8” diameter solid bar to ensure minimal impact on ride quality but with a big bonus to handling.

With fitments for both AWD and FWD setups, you can be sure there is an upgrade that’s perfect for your car. Read on for details and check out the release blog for even more info!

Read the blog:Reduce Body Roll With The New CorkSport Rear Sway Bar

#4thGenMazda3!

The CorkSport Advantage

Racing Inspired:

With our experience racing our old Mazda 2, we knew right away that we had to figure out a rear sway bar for the GEN4’s torsion beam suspension to help fight understeer. Since there is no OEM sway bar, we had to get creative. The CorkSport GEN4 Mazda 3 sway bar bolts directly to the torsion beam of the vehicle, similar to our Mazda 2 Torsion Bar. Since a torsion beam essentially acts as a sway bar, adding on extra material offers the same effect as moving to a bigger bar with a more typical suspension.

Mazda3 2020 Handling Improvement Blue Sway Bar

Handling Boost:

The main goal of the CS rear sway bar is to improve handling. By effectively stiffening the torsional rigidity of the rear torsion beam, understeer is reduced, body roll is reduced, and handling feel is improved. We chose a 7/8” diameter solid bar for the right balance of understeer reduction without dangerous oversteer. You can get the car to rotate if you’re really attacking an autocross course but don’t worry, it is perfectly controllable and safe for daily driving and hitting a backroad.

Fitment Focused:

While the concept is similar to our Mazda 2 bar, the design had to be totally unique in order to fit the GEN4 Mazda 3 just like an OEM part. We ended up with a separate design for both the FWD and AWD versions to really optimize fitment. There is one minor drawback for installation though. Some plastic aerodynamics pieces must either be removed or trimmed for fitment. We tried to avoid this; however, it was a necessary evil in order to utilize optimal mounting locations.

Materials & Manufacturing:

Like all CorkSport sway bars the GEN4 Mazda 3 bar is made from 4130 steel for great strength and consistent performance over time. We finish off the bars in CS blue powder coat for FWD vehicles and red powder coat for AWD vehicles. This ensures a great look and corrosion resistance. Each rear sway bar kit also comes with all the hardware needed for installation, all of which is made from stainless steel so it’s sure to stand the test of time. We even use locking nuts so you can be sure your sway bar stays where it’s supposed to.

Removal or minor trimming of plastic aerodynamic components is required for installation. See installation instructions for details.
AWD vehicles that are extremely low and/or bagged will need to verify clearance from the top of the sway bar to all other components of the vehicle to ensure safe operation.
Cannot install on AWD vehicles with a lift kit. The sway bar will interfere with the differential/driveshaft system.

Additional Features

Vehicle Fitment: 2019+ Mazda 3 FWD, AWD and Turbo. 2019+ Mazda CX-30 FWD, AWD, and Turbo.
Developed in America: Designed, tested, and proven in Vancouver, Washington.
CorkSport Service and Support: Receive a 2-year warranty, full-color installation instructions, all of the needed installation hardware, and knowledgeable telephone installation support.

How To Install the CorkSport Mazda 3/CX-30 Rear Sway Bar

It will take you Approx. 1 hour to install the Mazda Rear Sway Bar .

1 hour Install Time

2/5 Difficulty

2-Year Warranty

No CEL

Would this also work on a 2023 cx-50?

Asked by Bert | 04/09/2026, 07:32 PM | 1 answer(s)

I'd like a fwd in red, the color scheme of my build will be thrown off by a lone blue part is this possible?

Asked by Ricky Wren | 09/03/2025, 04:51 PM | 1 answer(s)

will the awd sway bar work for the fwd?

Asked by Thomas | 05/05/2025, 04:01 AM | 1 answer(s)

will the awd sway bar work for the fwd?

Asked by Thomas | 05/05/2025, 04:00 AM | 1 answer(s)

I have 2025 Mazda 3 sedan sport select rear sway bar you have fits since it's still 4th gen?

Asked by Abdi | 11/29/2024, 07:47 PM | 1 answer(s)

What affects the handling when already on CS low springs? (Fwd)

Asked by Tayler | 11/05/2024, 09:46 PM | 1 answer(s)

Does this mod increase oversteer on the vehicle ? Of so, is it significant? What can I expect as far as the behavior of the car in tight cornering vs OEM.

Asked by Rafael | 09/28/2024, 11:56 AM | 1 answer(s)

Will this have any affect if using with the skid plate for a 4th gen fwd sedan ?

Asked by Leo Lomeli | 03/07/2024, 08:26 PM | 1 answer(s)

What size are the nuts and bolts included with the kit?

Asked by Zach | 07/24/2023, 12:00 PM | 1 answer(s)

The instructions aren't exactly clear on this issue.... Are there aero covers on a 2022 FWD Mazda 3. A quick glance under the car didn't seem to show any.

Asked by John | 06/24/2023, 08:26 AM | 1 answer(s)

I have a 2022 M3HTPP, stock color PQM, wrapped color blue. I'd really like the blue sway bar, but is there a diff btw blue/red sway bars, and how would I select blue during ordering?

Asked by Enoryt Diov | 04/30/2023, 07:00 AM | 0 answer(s)

Is this an upgrade for the cx30 turbo or just for the N/A's?

Asked by Scott | 02/11/2023, 03:28 PM | 1 answer(s)

New post

Mazda performance parts financing is available with CorkSport

Looking to finance your parts purchase and want to get 6 months NO interest on any purchase over $199? Click on the image above for more details.

Fits:
2019-up Mazda 3
2021 Mazda 3 Turbo
2021 Mazda CX30
2021 Mazda CX30 Turbo

Fits

2019+ Mazda 3

2019 Mazda 3
2020 Mazda 3
2021 Mazda 3
2022 Mazda 3
2023 Mazda 3

2021+ Mazda 3 Turbo

2021 Mazda 3 Turbo
2022 Mazda 3 Turbo
2023 Mazda 3 Turbo

2021+ Mazda CX-30

2021 Mazda CX-30
2022 Mazda CX-30
2023 Mazda CX-30

2021+ Mazda CX-30 Turbo

2021 Mazda CX-30 Turbo
2022 Mazda CX-30 Turbo
2023 Mazda CX-30 Turbo

Rain Cunningham

01/26/2025, 06:33 AM

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Truly makes the car feel a world better. One of the best first mods. This car has an complex rear end on the AWD models. The instructions made install a breeze.

Joe Pascuzzi

01/13/2025, 04:56 PM

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One of the best things you can do for this car, extremely easy install and makes a huge difference

Madi DeGarmo

10/30/2024, 03:00 PM

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As someone who regularly travels through the mountains, purchasing the RSB was a no-brainer. I could feel the improvement in handling immediately in my first drive through the winding roads. Due to the understeer and body roll being reduced, I felt more confident in pushing my 3 through the turns!
Install was a breeze (as always) due to the direct and straight-forward instructions provided. If you’re looking for a simple and cost effective mod, I can’t recommend the RSB enough!

Josh Able

10/17/2024, 02:02 PM

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So yup, the Corksport rear swaybar is definitely a nice addition to the handling of my 2019 na 6sp mt.

Easy to install and, despite expecting to notice a bit of a change in body roll on corners, I was really impressed by how much this simple and relatively (as far as mods go) inexpensive upgrade improved the feel in corners.

Gotta love my country roads ????

John D

10/15/2024, 07:21 AM

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Just installed the rear sway bar over the weekend. As advertised, this install was straight forward and simple. The only difficult part was cutting/trimming the plastic shield on each side. My Mazda 3 is my third Mazda and this is my third sway bar purchased from CorkSport. The drive is so much more fun now that body roll is reduced.

Brian Thiem

08/26/2024, 05:53 PM

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Great way to bring this car to life! Really helps in cornering and changes the driving dynamics overall.

Evelyn Landau

08/17/2024, 05:03 PM

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I'm writing this from the pits of the first autocross event I've participated in since installing this swaybar, and it completely changed the behavior of my Mazda3 Turbo at the limit. This is a must-have mod for any enthusiast with a 4th gen, it makes the car infinitely more playful and enjoyable, tilting the handling balance from heavy understeer to light but controllable oversteer. In normal driving, the difference to comfort is minimal, the rear just feels slightly stiffer. As far as I'm concerned this is how the car should feel from the factory

Anthony Alvarez del Real

01/21/2024, 01:46 PM

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The RSB is a game changer to the handling of these cars. Some might say it’s really not necessary since the 4th gen has a torsion beam suspension in the rear, but it truly benefits tremendously from it (hence why it’s used in Mazda2 racecars that have same suspension). The RSB allowed me to kick the end out on curvy roads aiding in removing that disgusting understeer. It also made the car turn a lot flatter on the track.

Chris Sistoso

10/26/2023, 03:50 PM

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Easy installation. Works great. Install tip: Use zip ties before tightening the sway bar. It will help with increase bar clearance.

Matthew Archer

08/27/2023, 05:26 PM

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If you want your 4th gen to handle better this mod is a must. The installation process wasn't hard thanks to Corksport's instructions. The handling was dramatically improved thanks to the rear end being a lot stiffer.

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