PowerStop AR82146 Disc Brake Rotor - Rear

Brand	PowerStop AR82146
Position	Rear
Discard Thickness	0.85
Discard Thickness	21.50
Nominal Thickness	0.91
Nominal Thickness	23.10
Rust Resistant Coating	No
Overall Height	1.90
Overall Height	48.30
Outside Diameter	12.40
Outside Diameter	315.20
Solid Or Vented Type Rotor	Vented
Mounting Bolt Hole Circle Diameter	120.00
Mounting Bolt Hole Circle Diameter	4.70
Stud/Lug Hole Quantity	5
Product line	Power Stop - Rear OE Stock Replacement Brake Rotor
Fits	Buick, Cadillac, Chevrolet, and Saab · 62 vehicles

Direct fit solution. Matches original equipment fit and performance for straightforward replacement.

Vented rotor design. Helps promote airflow for more consistent braking performance.

Brake rotor. Built for dependable disc brake service in a stock replacement application.

$94.67Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Confirm position

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Step 2 — Quantity

Disc Brake Rotors are typically replaced in pairs, axle by axle.

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Disc Brake Rotor options

Rear OE Stock Replacement Rotor for OE Fit

The PowerStop AR82146 is a rear disc brake rotor built as a direct-fit OE stock replacement. It is sized for the rear brake position and matches the factory-style vented rotor layout used on select Cadillac, Chevrolet, Buick, and Saab applications.

For drivers searching for a rear brake rotor for a 2020-2025 Cadillac CT5, a rear rotor for a 2016-2024 Chevrolet Camaro, or a rear replacement rotor for a 2014-2020 Chevrolet Impala, this part follows the original equipment fit and performance profile.

Key Features

Part number: AR82146
Rear disc brake rotor for OE stock replacement use
Vented rotor design
Outside diameter: 12.40 in. / 315.20 mm
Nominal thickness: 0.91 in. / 23.10 mm
Discard thickness: 0.85 in. / 21.50 mm
Overall height: 1.90 in. / 48.30 mm
5-lug mounting pattern with 120.00 mm bolt circle diameter
No rust resistant coating

Product Details

Power Stop’s Autospecialty rotor line focuses on direct-fit replacement parts that follow original equipment dimensions and braking layout. AR82146 is a rear vented rotor with the correct diameter, thickness, height, and bolt pattern for the listed applications, helping maintain factory-style brake system geometry. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With rear brake applications on 2020-2025 Cadillac CT5, 2016-2024 Chevrolet Camaro, 2014-2020 Chevrolet Impala, 2016-2019 Cadillac CT6, 2013-2019 Cadillac XTS, 2011-2017 Buick Regal, 2013-2016 Buick LaCrosse, 2013-2015 Chevrolet Malibu, 2012 Buick LaCrosse, 2010-2011 Buick LaCrosse, 2010-2011 Saab 9-5, and 2010 Buick Allure. The part number AR82146 is also a useful reference when verifying rear rotor dimensions against OE specifications.

Common Problems This Rotor Can Address

Rear brake rotor wear that has reached discard thickness
Brake pulsation caused by rotor surface variation or thickness loss
Noise from a worn or uneven rear rotor surface
Factory-style replacement needs after brake service
Fitment issues when the rear rotor diameter or bolt pattern does not match OE specs

Installation Notes and Tips

Confirm rear fitment by matching the vehicle year, make, model, and rotor dimensions before installation. Verify the 5-lug, 120.00 mm bolt circle and vented rotor configuration against the original part. Clean the hub mounting surface before installing the rotor, and inspect pads, calipers, and hardware condition at the same time to help ensure even braking performance.

Quality Assurance

Power Stop positions the Autospecialty rotor line as an OE-style replacement solution built around factory fit and performance requirements. AR82146 is specified to match the listed rear applications and original equipment dimensions for a direct replacement approach.

This part fits 62 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Body Type	Liters	Cylinders	Fuel Type	Position	Notes
2025	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2024	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2024	Chevrolet	Camaro	LT1	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2023	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2023	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2022	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2022	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2021	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2021	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2021	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2021	Chevrolet	Camaro	LT1	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2020	Cadillac	CT5	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2020	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2020	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2020	Chevrolet	Camaro	LT1	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2020	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2019	Cadillac	CT6	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2019	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2019	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2019	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2019	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2018	Cadillac	CT6	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2018	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2018	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2018	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2018	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Buick	Regal	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Cadillac	CT6	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Chevrolet	Camaro	LS	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2017	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Buick	LaCrosse	—	—	—	—	—	Rear	321mm Front Rotor; Vented Rear Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Buick	Regal	—	—	—	—	GAS	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Buick	Regal	—	—	—	—	FLEX	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Cadillac	CT6	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Chevrolet	Camaro	LT	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2016	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Buick	LaCrosse	—	—	—	—	—	Rear	321mm Front Rotor; Vented Rear Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Buick	Regal	—	—	—	—	GAS	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Buick	Regal	—	—	—	—	FLEX	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2015	Chevrolet	Malibu	—	—	2.0L	L4	—	Rear	Vented Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2014	Buick	LaCrosse	—	—	—	—	—	Rear	321mm Front Rotor; Vented Rear Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2014	Buick	Regal	—	—	—	—	GAS	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2014	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2014	Chevrolet	Impala	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2014	Chevrolet	Malibu	—	—	2.0L	L4	—	Rear	Vented Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2013	Buick	LaCrosse	—	—	—	—	—	Rear	321mm Front Rotor; Vented Rear Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2013	Buick	Regal	—	—	—	—	FLEX	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2013	Cadillac	XTS	—	Sedan	—	—	—	Rear	5 Lug; Power Stop - Rear OE Stock Replacement Brake Rotor
2013	Chevrolet	Malibu	—	—	2.0L	L4	—	Rear	Vented Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2012	Buick	LaCrosse	—	—	—	—	—	Rear	321mm Front Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2012	Buick	Regal	—	—	2.0L	L4	FLEX	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2011	Buick	LaCrosse	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2011	Buick	Regal	—	—	2.0L	L4	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2011	Saab	9-5	—	—	—	—	—	Rear	315mm Vented Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
2010	Buick	Allure	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2010	Buick	LaCrosse	—	—	—	—	—	Rear	Power Stop - Rear OE Stock Replacement Brake Rotor
2010	Saab	9-5	—	—	—	—	—	Rear	315mm Vented Rotor; Power Stop - Rear OE Stock Replacement Brake Rotor
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