Stoptech 126.40053SL Disc Brake Rotor - Rear Left

StopTech Slotted Sport Rotor Overview

The StopTech Sport Slotted Disc Brake Rotor is a direct replacement brake disc for factory brake systems and stock calipers. This rotor is built for the rear left position on compatible Acura MDX and Honda Pilot applications, with slotting that helps move heat and brake dust away from the braking surface while improving pad bite.

Part number 126.40053SL is a StopTech Sport Slotted Disc Brake Rotor designed to maintain OE-style fitment while adding performance-focused surface treatment and corrosion protection.

Key Features

• Direct replacement disc brake rotor for factory brake systems
• Slotted surface helps disperse heat and brake dust
• Slot design helps reduce pad glazing and improve initial bite
• Black e-coating helps protect against corrosion
• High carbon metallurgy in most applications for quieter operation and improved crack resistance
• Compatible with stock calipers
• Rear left fitment for select Acura MDX and Honda Pilot models

Product Details

StopTech Sport Slotted Disc Brake Rotors are engineered as one-piece replacement rotors with a coated hat finish and a slotted surface type. This rotor measures 12.323 inches in outside diameter, 2.197 inches in overall height, and uses a 5-lug pattern with a 4.500-inch bolt circle and 2.524-inch center hole diameter. The solid rotor design and 13.0 lb weight support OE-style replacement needs while the slot pattern helps maintain consistent braking performance in wet and dry conditions. Part number 126.40053SL is a practical upgrade for drivers looking for a rear left brake rotor that preserves factory fitment and adds performance-oriented surface engineering.

Compatible With 2001-2006 Acura MDX, rear left, and 2003-2008 Honda Pilot, rear left. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Rotor Helps Address

• Brake fade from heat buildup during repeated stops
• Uneven pad glazing that can reduce braking response
• Excess brake dust accumulation on the rotor surface
• Corrosion on exposed rotor surfaces
• Reduced wet-weather braking consistency

Installation Notes

Install on the rear left position only for the listed applications. Verify rotor dimensions, hub fitment, and lug pattern before installation, and inspect pads, caliper hardware, and wheel bearings during brake service. Because this rotor is intended for stock calipers and factory brake systems, it should be matched to the vehicle’s original brake configuration.

Quality Assurance

StopTech designs this rotor with black e-coating for corrosion resistance and, in most applications, high carbon metallurgy for improved noise control and crack resistance. The part is built as a direct replacement brake rotor for consistent OE-style fitment and performance.