Centric 320.34117H Disc Brake Rotor - Rear

Centric GCX Rear Brake Rotor Overview

The Centric GCX Elemental Protection Disc Brake Rotor, part number 320.34117H, is built for rear brake service on select BMW applications. It combines a fully coated finish with high carbon metallurgy to support OE-style braking performance while helping resist rust and corrosion on exposed surfaces.

For drivers searching for a rear brake rotor for BMW 550i GT xDrive, BMW 750i, or BMW 760Li applications, this Centric GCX rotor is engineered to match the vehicle’s original brake profile and maintain a clean appearance over time.

Key Features

• Part number 320.34117H rear disc brake rotor
• Fully coated disc finish with coated hat for corrosion resistance
• High carbon rotor metallurgy for OE-matched brake performance
• Vented rotor design with straight vane construction
• Smooth surface type for consistent pad contact
• 5-lug pattern with 120 mm bolt circle diameter
• Outside diameter: 370 mm (14.567 in.)
• Nominal thickness: 23.8 mm (0.937 in.)
• Discard thickness: 22.4 mm (0.882 in.)

Product Line Details

Centric’s GCX Elemental Protection line uses application-specific coating patterns and rotor metallurgy to align with OE brake requirements. This GCX rotor is part of that family, using Centric’s RS200-style protection on non-mating surfaces to help reduce surface rust while preserving the braking interface where pad contact occurs.

Detailed Description

Centric 320.34117H is a rear vented brake rotor with a 75 mm center hole diameter, 69 mm overall height, and floating/DIH disc mounting. It is designed for BMW rear brake service where the original rotor dimensions call for a 370 mm outside diameter and a 120 mm bolt circle. The fully coated finish helps protect the hat and non-friction surfaces, while the high carbon construction supports stable braking characteristics under everyday driving conditions.

This part fits 2010-2017 BMW 550i GT xDrive, rear; 2010-2015 BMW 550i GT, rear; 2009-2015 BMW 750i, rear; 2010-2015 BMW 750i xDrive, rear; 2010-2015 BMW 750Li, rear; 2010-2015 BMW 750Li xDrive, rear; and 2010-2015 BMW 760Li, rear. It is a direct-fit rear rotor choice for BMW 750i rear brake rotor replacement and BMW 550i GT xDrive rear brake service.

Common Uses

• Rear rotor replacement for worn BMW brake components
• Correction of brake pulsation caused by rotor wear or thickness loss
• Replacement for rusted or corroded rear brake rotors
• Service for vehicles needing OE-size rear vented rotors
• Maintenance for BMW rear braking systems with 5-lug, 120 mm bolt pattern

Installation Notes and Tips

Verify rotor dimensions, hub fitment, and brake pad condition before installation. Clean the hub mounting surface thoroughly to help prevent runout-related brake noise or pedal vibration. Because this rotor is fully coated, avoid damaging the coated non-mating surfaces during handling and installation. Always confirm rear-position fitment against the vehicle’s brake package before ordering.

Quality Assurance

Centric GCX rotors are engineered to align with OE performance targets and use corrosion-resistant coating on exposed surfaces. The high carbon alloy formulation is selected to match the OEM metallurgical profile for the listed BMW rear applications.