DuraGo BR31228 Disc Brake Rotor - Rear

Brand DuraGo BR31228
Position Rear
Material Cast iron
Discard Thickness 0.3
Discard Thickness 7.5
Nominal Thickness 0.37
Nominal Thickness 9.5
Construction Full cast
Rust Resistant Coating No
Overall Height 2.22
Overall Height 56.5
Outside Diameter 11.25
Outside Diameter 285.7
Mounting Bolt Hole Quantity 5
ABS Tone Ring Included No
Solid Or Vented Type Rotor Solid
Center Hole Diameter 2.84
Center Hole Diameter 72.1
Mounting Bolt Hole Circle Diameter 114.3
Mounting Bolt Hole Circle Diameter 4.5
Mounting Bolt Hole Diameter 0.52
Mounting Bolt Hole Diameter 13.1
Directional or Non-Directional Brake Surface Non-directional
Conventional Or Drum-In-Hat Type Rotor Drum-in-hat
Cross Drilled No
Slotted No
Fits Mazda · 6 vehicles

Cast iron build. Full cast construction for a conventional brake rotor replacement.

Non-directional surface. Supports consistent contact characteristics during brake service.

ISO certified production. Manufactured to meet fit, form, and function requirements.

Cross-references Dorman - HELP 96649, 31228 and 125613 for the same application. See all 7.

$34.57Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Disc Brake Rotors are typically replaced in pairs, axle by axle.
Order total $34.57
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Overview

DuraGo BR31228 is a rear disc brake rotor for select Mazda Millenia applications. It is built as a full cast, solid rotor with a non-directional brake surface for consistent service replacement and straightforward resurfacing considerations.

Key Features

  • Cast iron construction with full cast design
  • Solid rotor configuration for rear brake service
  • Non-directional brake surface
  • 5-bolt mounting pattern with 114.3 mm bolt circle
  • 11.25 in. outside diameter and 2.84 in. center hole diameter
  • Disc brake rotor, part number BR31228

Detailed Description

This DuraGo brake rotor is engineered for fit, form, and function in applications that require a rear drum-in-hat style rotor. The cast iron build and solid construction provide a conventional replacement format, while the non-directional surface supports even contact characteristics during brake service. For buyers searching for a Mazda Millenia rear brake rotor, BR31228 matches the listed vehicle fitment and dimensions. This part cross-references Dorman - HELP 96649 for the same application.

Common Uses

  • Correcting brake pulsation caused by rotor wear or uneven surface condition
  • Replacing a rotor that has reached discard thickness
  • Restoring rear brake performance on a Mazda Millenia
  • Addressing scoring, corrosion, or heat-related surface damage

Installation Notes

Fits 1997-2002 Mazda Millenia, rear. Verify rotor dimensions, hub fit, and brake system configuration before installation. Confirm the drum-in-hat rear brake setup and compare the existing rotor against the listed specifications. Part number BR31228 should be matched to the vehicle application before service.

Quality Assurance

DuraGo manufactures this rotor through ISO certified factories and positions its brake drum and rotor program for professional-grade catalog coverage and application accuracy.

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2002MazdaMilleniaRear—
2001MazdaMilleniaRear—
2000MazdaMilleniaRear—
1999MazdaMilleniaRear—
1998MazdaMilleniaRear—
1997MazdaMilleniaRear—
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - HELP — 9664931228125613AX31228BD125613P96649TY3226251A