PowerStop Power Stop 90-93 Mazda Miata Front Autospecialty Brake Rotor JBR543
PowerStop Power Stop 90-93 Mazda Miata Front Autospecialty Brake Rotor JBR543
Part number: 1U4W5
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- Free fitment check before you order
Listed for: Mazda MiataFitment notes & questions
Brake rotor by Power Stop, made to fit the 1990–1993 Mazda Miata as listed below. Brake parts are usually replaced per axle, left and right together, so the car stops straight. The fitment section lists 3 applications for the 1990–1993 Mazda Miata.
Key features
- Power Stop Autospecialty brake rotors provide a direct fit solution for original equipment fit and performance
- Front position
Specifications
- Brand: Power Stop
- Part type: Brake part
- Position: Front
Fitment for the 1990–1993 Mazda Miata
- 1990 - 1993 Mazda Miata Base
- 1993 Mazda Miata LE
- 1991 Mazda Miata SE
Check your year, model, engine and trim against this list before you order.
What it does
Squealing, grinding, a pulsing pedal or a long stopping distance all mean the brakes need attention. Brakes are the most important safety system on the car; replacing worn parts restores stopping power and pedal feel, and upgraded parts handle heat better.
Installation & tips
- Bed in new pads and rotors following the brand instructions, and bleed the brakes if the system was opened.
- Brake fluid: Old fluid absorbs water; flush it when you do a brake job.
- Hardware: Clips and pins wear with the pads.
- This part affects how the vehicle stops, steers or holds the road. If you are not sure how to fit it, have it installed or checked by a qualified mechanic.
FAQ
Which side or position does it fit?
It is listed for the front position. If you are replacing both sides, check whether you need one of each.
How many vehicles is it listed for?
3 applications are listed in the fitment section above.
Can I install it myself?
Many owners do this job at home with the right tools and a service manual, but because it is a safety-related part, have the work checked by a qualified mechanic if you are not sure.
Before you order
- Confirm your year, make, model and trim match the fitment listed above (1990–1993 Mazda Miata).
- Check the position: this part is listed as front.
- Plan to bleed the brakes and bed in new pads and rotors after fitting, if the job calls for it.

Brake part for the Mazda Miata: what to know
Squealing, grinding, a pulsing pedal or a long stopping distance all mean the brakes need attention.
Fitment notes
- Listed for: Mazda Miata.
- Model years: 90-93. If your year sits at the edge of the range, check the details above.
- Specs, lead time and warranty come from the manufacturer and supplier and can change. The details above this guide are the latest we have.
Not sure it fits? Message us your vehicle details and we'll double-check fitment before you buy.
Ask about fitmentWhat else to plan for
- Brake fluid. Old fluid absorbs water; flush it when you do a brake job.
- Hardware. Clips and pins wear with the pads.
More for your car: Brake Rotors · Mazda Parts · Brakes
Questions about Mazda Miata brake part
Will this fit my Mazda Miata?
Should I replace both sides?
Do I need new rotors with new pads?
Where do specs and warranty details come from?
Questions & answers
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