When replacing sway bar bushings on the Mazda RX-8 SE3P (2003–2009), correct inner diameter (I.D.) selection is critical. Mazda used different stabilizer bar sizes depending on production batch and trim level, so verifying dimensions before ordering is essential.

Front Sway Bar Bushing I.D.

Depending on configuration, the front stabilizer bar may use:

• 25 mm I.D.
• 26 mm I.D.

Even a 1 mm difference will affect fitment and performance, so measurement accuracy matters.

Rear Sway Bar Bushing I.D.

Rear stabilizer bar sizes may vary between:

• 15.5 mm I.D.
• 16 mm I.D.
• 17 mm I.D.

Rear bar diameter often differs by trim, market specification, or factory sport package.

How to Confirm the Correct Size

The most accurate way to verify sway bar diameter is by VIN check. Measuring the bar directly with a caliper (after cleaning the surface) is also recommended if the vehicle is already disassembled.

If you are unsure which size your RX-8 requires, please do not hesitate to reach out to us — we’ll be glad to assist with proper fitment confirmation.

Correct sizing ensures proper clamp force, reduced movement, and optimal suspension performance.

Enjoy the rest of the day — and drive safe!