PowerStop AR82121 Disc Brake Rotor - Front

Front OE Stock Replacement Brake Rotor

PowerStop AR82121 is a front disc brake rotor built as a direct-fit OE stock replacement for select Buick, Cadillac, and Chevrolet applications. It matches original equipment fit and performance requirements for drivers servicing a front brake rotor on vehicles such as the Buick Lucerne, Cadillac DTS, and Chevrolet Impala.

Power Stop’s Autospecialty rotor line focuses on straightforward replacement parts for factory-style braking service. This vented front rotor is sized for the specified applications and supports consistent brake service on daily-driven vehicles, including police and taxi duty where listed.

Key Features

• Front disc brake rotor for OE-style replacement service
• Direct fit for select Buick, Cadillac, and Chevrolet front brake applications
• Vented rotor design for front axle use
• Outside diameter: 12.70 in. / 323.00 mm
• Nominal thickness: 1.18 in. / 30.00 mm
• Discard thickness: 1.13 in. / 28.60 mm
• Overall height: 2.10 in. / 52.30 mm
• 5-lug pattern with 115.00 mm / 4.50 in. bolt circle diameter

Detailed Description

PowerStop AR82121 is engineered as a front OE stock replacement brake rotor for vehicles that require a vented rotor with the listed dimensions and bolt pattern. It is a practical choice for front brake service on 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2008-2009 Buick LaCrosse, 2008 Buick Allure V8 models, 2009 Buick Allure, 2012-2013 Chevrolet Impala, and 2014-2016 Chevrolet Impala Limited in the specified front-position applications. If you are searching for a front brake rotor for a 2006-2011 Buick Lucerne or a front rotor for a 2012-2013 Chevrolet Impala, AR82121 matches the listed fitment and OE-style service requirements.

This part cross-references no interchange numbers provided in the catalog data. The Power Stop AR82121 part number is useful when verifying the correct front rotor for the exact vehicle and trim listed above.

What This Rotor Helps Address

• Front brake rotor wear that requires replacement at service intervals
• Brake pulsation caused by rotor thickness variation or surface wear
• Reduced braking consistency from a worn OE-style front rotor
• Noise or vibration associated with an out-of-spec front disc rotor
• Service needs on front brake systems for police, taxi, and standard-duty applications where listed

Installation Notes and Tips

Confirm the vehicle year, make, model, and front position before ordering. Verify rotor diameter, thickness, bolt circle, and lug count against the existing part and brake system specifications. Clean the hub mounting surface before installation and inspect pads, calipers, and hardware condition during brake service. For best results, replace rotors only with the correct front application listed for your vehicle.

Quality Assurance

Power Stop positions this Autospecialty rotor line as a direct-fit OE replacement solution for original equipment fit and performance. AR82121 is built to the listed dimensional specifications for the confirmed front applications, supporting a factory-style brake service approach.