Centric 320.34124H Disc Brake Rotor - Front

Centric GCX Front Brake Rotor Overview

The Centric GCX Elemental Protection Disc Brake Rotor, part number 320.34124H, is a front vented rotor built for OE-style braking performance and corrosion resistance. It is a fully coated rotor with a smooth surface, high carbon metallurgy, and application-specific coating coverage for BMW 535d, 535i, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, and ActiveHybrid 5 front brake applications.

Centric GCX rotors are engineered to match the vehicle’s original metallurgical profile and braking requirements. The RS200 coating on non-mating surfaces helps protect against rust while maintaining a clean appearance over time.

Key Features

• Part number 320.34124H front disc brake rotor
• Fully coated disc finish with coated hat for added corrosion protection
• High carbon content rotor metallurgy for OE-style performance
• Vented rotor design with smooth surface type
• Outside diameter: 13.701 in. / 348.0 mm
• Nominal thickness: 1.181 in. / 30.0 mm
• Discard thickness: 1.118 in. / 28.4 mm
• 5-lug mounting pattern with 120.0 mm bolt circle
• Center hole diameter: 2.953 in. / 75.0 mm

Product Details

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating, High Carbon Content line is built around application-specific rotor metallurgy and coating patterns. For BMW front brake service, this rotor is matched to the vehicle’s OEM-style carbon profile and uses a fully coated finish to help resist rust on exposed surfaces. The result is a front brake rotor designed for consistent braking feel, clean appearance, and long-term durability on vehicles such as the BMW 535i and BMW 640i family. Part number 320.34124H is a direct-fit style rotor for the listed front applications.

What This Rotor Helps Address

• Front brake rotor rust and corrosion on exposed surfaces
• Brake pulsation caused by worn or below-spec rotors
• Reduced braking consistency from rotor wear
• Unsightly surface oxidation on daily-driven BMW front brakes
• Replacement needs for vented front rotors on OE-style brake service

Installation Notes and Tips

Verify rotor dimensions, hub fitment, and brake pad condition before installation. This rotor is for front position use only and does not include ABS tone ring or bearings. Clean the hub mounting surface thoroughly to help prevent runout-related brake noise or pedal vibration. For best results, replace pads and inspect calipers and hardware during brake service.

Fits 2014-2016 BMW 535d, front; Fits 2014-2016 BMW 535d xDrive, front; Fits 2014-2016 BMW 535i, front; Fits 2011-2016 BMW 535i xDrive, front; Fits 2012-2016 BMW 640i, front; Fits 2013-2016 BMW 640i Gran Coupe, front; Fits 2014-2016 BMW 640i xDrive, front; Fits 2014-2016 BMW 640i xDrive Gran Coupe, front; Fits 2012-2016 BMW ActiveHybrid 5, front; Fits 2011-2013 BMW 535i, front.

Quality Assurance

Centric designs GCX rotors to align with OE performance targets and vehicle-specific metallurgy requirements. The GCX line uses Centric’s RS200 coating on non-mating surfaces to support corrosion protection and maintain rotor appearance over time.