ATE 412178 Disc Brake Rotor - Rear

ATE Original Rotor for Rear Brake Service

The ATE Original Rotor 412178 is a rear disc brake rotor built for European OE-style braking performance and consistent fitment. It features a full cast construction, smooth surface, non-directional finish, and a rust resistant coating to support dependable braking and cleaner service life.

Compatible With Audi A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, allroad, and Q5 rear brake applications. The ATE Original Rotor line reflects ATE’s focus on coated brake discs and premium aftermarket brake components engineered from Continental Automotive Systems’ OE brake experience.

Key Features

• Part number 412178 ATE Original Rotor
• Rear disc brake rotor for select Audi applications
• Full cast construction with smooth surface
• Non-directional disc finish for service-friendly installation
• Rust resistant coating helps protect the rotor surface
• Solid rotor design
• 5-bolt hole pattern
• Outside diameter: 300.00 mm
• Nominal thickness: 12.00 mm
• Discard thickness: 10.00 mm
• Height: 36.40 mm
• Inside diameter: 169.00 mm

Detailed Description

ATE Original Rotor 412178 is engineered for rear brake service on select Audi models, including Audi A4, Audi A4 Quattro, Audi A5, Audi A5 Quattro, Audi allroad, Audi A6, Audi A6 Quattro, and Audi Q5 rear brake applications. The rotor uses a solid, full cast design with a non-directional finish to support even pad contact and straightforward brake service. Its rust resistant coating helps preserve the rotor surface before and after installation, while the smooth surface finish supports consistent braking feel.

ATE builds aftermarket brake parts with the same engineering discipline associated with its OE brake system background. This rotor is a direct-fit style replacement for vehicles that require a 300 mm rear disc brake rotor with a 5-bolt pattern and the listed thickness and height specifications. Part number 412178 is also referenced in select aftermarket catalogs for the same application.

What This Rotor Helps Address

• Brake pulsation caused by worn or uneven rear rotors
• Reduced braking consistency from rotor wear beyond discard thickness
• Surface corrosion on exposed brake rotor faces
• Noise or vibration related to rotor condition
• Service replacement for rear brake maintenance on Audi vehicles

Installation Notes and Tips

Verify rotor dimensions, bolt pattern, and rear axle fitment before installation. Confirm the rotor meets the vehicle’s required nominal thickness, discard thickness, and overall height specifications. Inspect pads, caliper hardware, and hub condition during service so the new rotor seats correctly and wears evenly. Clean the rotor and hub mating surfaces before assembly to reduce runout concerns.

Fits 2008-2017 Audi A5 Quattro, rear; 2009-2017 Audi Q5, rear; 2009-2016 Audi A4, rear; 2009-2016 Audi A4 Quattro, rear; 2013-2016 Audi allroad, rear; 2010-2014 Audi A5, rear; 2012-2013 Audi A6, rear; 2013 Audi A6 Quattro, rear.

Quality Assurance

ATE is part of Continental Automotive Systems and draws on OE brake manufacturing experience used across major vehicle platforms. The Original Rotor line is positioned as a premium aftermarket brake solution with coated disc technology and first-quality materials for consistent service results.