Stoptech 126.51015SL Disc Brake Rotor - Front Left

StopTech Slotted Front Left Rotor

The StopTech Sport Slotted Disc Brake Rotor, part number 126.51015SL, is a direct replacement front left rotor for factory brake systems and stock calipers. It is built for drivers who want improved braking response, cleaner pad contact, and a more finished look behind the wheel.

Compatible With select Hyundai Elantra, Hyundai Sonata, Hyundai Tucson, Kia Optima, Kia Sportage, Kia Soul, Kia Rondo, Kia Magentis, and Kia Tiburon applications, this rotor uses a slotted surface and vented construction to support consistent braking in daily driving conditions.

Key Features

• Part number 126.51015SL
• Front left disc brake rotor for factory brake systems
• Slotted surface helps move heat and brake dust away from the pad contact area
• Vented rotor design for improved thermal management
• Black coated hat finish for corrosion resistance
• High-carbon metallurgy in most applications for quieter operation and improved crack resistance
• 5-lug mounting pattern with 114.3 mm bolt circle
• 280 mm outside diameter, 69 mm center hole diameter

Product Details

StopTech Sport Slotted Disc Brake Rotors are engineered as one-piece direct replacement brake discs for stock calipers. The slot pattern helps reduce pad glazing, improves initial bite, and supports more stable wet and dry braking performance. With a nominal thickness of 26.1 mm and a discard thickness of 24.4 mm, this rotor is built to meet the demands of everyday street use while maintaining OE-style fitment. The coated hat finish also helps protect exposed surfaces from corrosion.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Rotor Can Address

• Brake fade during repeated stops
• Pad glazing that reduces pedal response
• Excess brake dust buildup on the rotor face
• Corrosion on exposed rotor surfaces
• Noisy or inconsistent braking from worn factory rotors

Installation Notes

Install on the front left position only and verify rotor dimensions, hub fitment, and brake package details before installation. This rotor is intended for stock calipers and factory brake systems. Confirm vehicle-specific notes such as 280 mm front disc requirements, 5-lug fitment, and model-year breakpoints before ordering. Professional installation and proper brake bedding are recommended after replacement.

Quality Assurance

StopTech designs this rotor with black e-coating protection and high-carbon metallurgy in most applications to support corrosion resistance, quieter operation, and improved crack resistance. The slotted, vented construction is intended to deliver consistent performance for compatible Hyundai and Kia front brake applications.