MPA Electrical
Black Series Coated Rotor

MPA Electrical BR79508G Disc Brake Rotor - Rear

Brand MPA Electrical BR79508G
Position Rear
Discard Thickness 0.33
Discard Thickness 8.5
Nominal Thickness 0.39
Nominal Thickness 10.0
Disc Finish Coated
Hat Finish Coated
Rust Resistant Coating Yes
Grade Type Standard replacement
ABS Tone Ring Included No
Surface Type Smooth
Solid Or Vented Type Rotor Solid
Bearings Included No
Mounting Bolt Hole Diameter 0.512
Mounting Bolt Hole Diameter 13.0
Stud/Lug Hole Quantity 5
Finish Coated
Product Condition New
Product line Black Series Coated Rotor
Fits Subaru · 7 vehicles

Standard replacement. A direct-fit brake rotor for straightforward service.

Coated finish. Helps resist rust in harsh conditions.

OE-style vane design. Promotes efficient cooling and smoother stopping.

Cross-references 26700-VA000 for the same application. See all 1.

$38.61Free 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 $38.61
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Rear Brake Rotor for Subaru WRX

The MPA Electrical Black Series Coated Rotor BR79508G is a rear disc brake rotor for 2015-2021 Subaru WRX applications. It is built as a standard replacement rotor with a coated finish to support consistent braking performance and corrosion resistance in demanding driving conditions.

The Black Series Coated Rotor line focuses on OE-style vane design and protective surface treatment. For Subaru WRX rear brake service, that means a rotor engineered for efficient cooling, smooth operation, and rust protection where exposed brake components are often affected by moisture, road salt, and heat cycling.

Key Features

  • Part number BR79508G for rear brake service
  • Compatible with 2015-2021 Subaru WRX, rear
  • OE-style vane design for improved cooling flow
  • Coated disc and hat finish for added rust resistance
  • Smooth surface type for stable brake pad contact
  • Solid rotor construction
  • Standard replacement grade
  • No ABS tone ring included
  • No bearings included

Product Details

MPA Electrical BR79508G is a coated rear disc brake rotor with a nominal thickness of 10.0 mm and a discard thickness of 8.5 mm. The rotor uses a 5-lug mounting pattern with 13.0 mm mounting bolt hole diameter and a smooth braking surface. The Black Series Coated Rotor finish is intended to resist rust while maintaining performance through repeated heat exposure. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Rotor Can Address

  • Rear brake pulsation from worn rotor surfaces
  • Rust buildup on exposed brake rotor surfaces
  • Noise caused by uneven or heat-spotted rotors
  • Reduced braking consistency from rotor wear
  • Cooling concerns during repeated stop-and-go driving

Installation Notes

Verify rear fitment before installation on your Subaru WRX and confirm rotor dimensions against the existing part. Inspect brake pads, caliper hardware, and hub surfaces during service, and clean the mounting face before installing the new rotor. Proper bedding-in of new pads and rotors helps promote even pad transfer and smooth braking performance.

Quality Assurance

The Black Series Coated Rotor line uses OE-style vane geometry and a protective coating designed to hold up under high temperatures and harsh weather exposure. For 2015-2021 Subaru WRX rear brake service, BR79508G provides a coated replacement rotor built for dependable everyday braking and corrosion protection.

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2021SubaruWRXRearBlack Series Coated Rotor
2020SubaruWRXRearBlack Series Coated Rotor
2019SubaruWRXRearBlack Series Coated Rotor
2018SubaruWRXRearBlack Series Coated Rotor
2017SubaruWRXRearBlack Series Coated Rotor
2016SubaruWRXRearBlack Series Coated Rotor
2015SubaruWRXRearBlack Series Coated Rotor
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
26700-VA000