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Disc Brake Rotor – Rear

PART#: 18A81956
ACDelco
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Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear
Disc Brake Rotor - Rear

$54.95

Select vehicle to confirm fitment

In stock

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Fitments
YearMakeModelSubmodelEngineFuel TypePositionNote
2024SubaruOutbackTouring2.5H4GASRear
2024SubaruOutbackBase2.5H4GASRear
2024SubaruOutbackLimited XT2.4H4GASRear
2024SubaruOutbackOnyx Edition2.5H4GASRear
2024SubaruOutbackPremium2.5H4GASRear
2024SubaruOutbackLimited2.5H4GASRear
2024SubaruOutbackTouring XT2.4H4GASRear
2024SubaruOutbackOnyx Edition XT2.4H4GASRear
2024SubaruOutbackWilderness2.4H4GASRear
2024SubaruLegacyBase2.5H4GASRear
2024SubaruLegacyPremium2.5H4GASRear
2024SubaruLegacyTouring XT2.4H4GASRear
2024SubaruLegacyLimited2.5H4GASRear
2024SubaruLegacySport2.4H4GASRear
2023SubaruWRXLimited2.4H4GASRearwith Electric Parking Brake
2023SubaruWRXBase2.4H4GASRearwith Electric Parking Brake
2023SubaruWRXPremium2.4H4GASRearwith Electric Parking Brake
2023SubaruWRXGT2.4H4GASRearwith Electric Parking Brake
2023SubaruLegacyPremium2.5H4GASRear
2023SubaruLegacyBase2.5H4GASRear
2023SubaruLegacyTouring XT2.4H4GASRear
2023SubaruLegacyLimited2.5H4GASRear
2023SubaruLegacySport2.4H4GASRear
2023SubaruOutbackLimited XT2.4H4GASRear
2023SubaruOutbackBase2.5H4GASRear
2023SubaruOutbackTouring2.5H4GASRear
2023SubaruOutbackOnyx Edition2.5H4GASRear
2023SubaruOutbackLimited2.5H4GASRear
2023SubaruOutbackPremium2.5H4GASRear
2023SubaruOutbackOnyx Edition XT2.4H4GASRear
2023SubaruOutbackTouring XT2.4H4GASRear
2023SubaruOutbackWilderness2.4H4GASRear
2022SubaruOutbackTouring2.5H4GASRear
2022SubaruOutbackLimited2.5H4GASRear
2022SubaruOutbackBase2.5H4GASRear
2022SubaruOutbackLimited XT2.4H4GASRear
2022SubaruOutbackPremium2.5H4GASRear
2022SubaruOutbackWilderness2.4H4GASRear
2022SubaruOutbackTouring XT2.4H4GASRear
2022SubaruOutbackOnyx Edition XT2.4H4GASRear
2022SubaruLegacyPremium2.5H4GASRear
2022SubaruLegacySport2.5H4GASRear
2022SubaruLegacyTouring XT2.4H4GASRear
2022SubaruLegacyBase2.5H4GASRear
2022SubaruLegacyLimited2.5H4GASRear
2022SubaruLegacyLimited XT2.4H4GASRear
2022SubaruWRXLimited2.4H4GASRearwith Electric Parking Brake
2022SubaruWRXBase2.4H4GASRearwith Electric Parking Brake
2022SubaruWRXPremium2.4H4GASRearwith Electric Parking Brake
2022SubaruWRXGT2.4H4GASRearwith Electric Parking Brake
2021SubaruOutbackLimited2.5H4GASRear
2021SubaruOutbackTouring2.5H4GASRear
2021SubaruOutbackBase2.5H4GASRear
2021SubaruOutbackPremium2.5H4GASRear
2021SubaruOutbackLimited XT2.4H4GASRear
2021SubaruOutbackTouring XT2.4H4GASRear
2021SubaruOutbackOnyx Edition XT2.4H4GASRear
2021SubaruLegacyBase2.5H4GASRear
2021SubaruLegacyTouring XT2.4H4GASRear
2021SubaruLegacySport2.5H4GASRear
2021SubaruLegacyLimited2.5H4GASRear
2021SubaruLegacyLimited XT2.4H4GASRear
2021SubaruLegacyPremium2.5H4GASRear
2021SubaruWRXBase2.0H4GASRearw/ Eyesight System
2021SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2021SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2020SubaruLegacyLimited XT2.4H4GASRear
2020SubaruLegacyLimited2.5H4GASRear
2020SubaruLegacyBase2.5H4GASRear
2020SubaruLegacyPremium2.5H4GASRear
2020SubaruLegacySport2.5H4GASRear
2020SubaruLegacyTouring XT2.4H4GASRear
2020SubaruOutbackBase2.5H4GASRear
2020SubaruOutbackPremium2.5H4GASRear
2020SubaruOutbackLimited XT2.4H4GASRear
2020SubaruOutbackTouring2.5H4GASRear
2020SubaruOutbackLimited2.5H4GASRear
2020SubaruOutbackTouring XT2.4H4GASRear
2020SubaruOutbackOnyx Edition XT2.4H4GASRear
2020SubaruWRXBase2.0H4GASRearw/ Eyesight System
2020SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2020SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2019SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2019SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2019SubaruWRXBase2.0H4GASRearw/ Eyesight System
2019SubaruLegacy2.5i2.5H4GASRear
2019SubaruLegacy2.5i Premium2.5H4GASRear
2019SubaruLegacy3.6R Limited3.6H6GASRear
2019SubaruLegacy2.5i Sport2.5H4GASRear
2019SubaruLegacy2.5i Limited2.5H4GASRear
2019SubaruOutback3.6R Touring3.6H6GASRear
2019SubaruOutback2.5i Touring2.5H4GASRear
2019SubaruOutback2.5i Premium2.5H4GASRear
2019SubaruOutback2.5i Limited2.5H4GASRear
2019SubaruOutback2.5i2.5H4GASRear
2019SubaruOutback3.6R Limited3.6H6GASRear
2018SubaruWRXBase2.0H4GASRearw/ Eyesight System
2018SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2018SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2018SubaruOutback2.5i2.5H4GASRear
2018SubaruOutback2.5i Limited2.5H4GASRear
2018SubaruOutback2.5i Touring2.5H4GASRear
2018SubaruOutback3.6R Touring3.6H6GASRear
2018SubaruOutback2.5i Premium2.5H4GASRear
2018SubaruOutback3.6R Limited3.6H6GASRear
2018SubaruLegacy2.5i Limited2.5H4GASRear
2018SubaruLegacy2.5i Sport2.5H4GASRear
2018SubaruLegacy2.5i2.5H4GASRear
2018SubaruLegacy2.5i Premium2.5H4GASRear
2018SubaruLegacy3.6R Limited3.6H6GASRear
2017SubaruOutback2.5i2.5H4GASRear
2017SubaruOutback2.5i Touring2.5H4GASRear
2017SubaruOutback2.5i Premium2.5H4GASRear
2017SubaruOutback2.5i Limited2.5H4GASRear
2017SubaruOutback3.6R Limited3.6H6GASRear
2017SubaruOutback3.6R Touring3.6H6GASRear
2017SubaruLegacy2.5i Limited2.5H4GASRear
2017SubaruLegacy2.5i Premium2.5H4GASRear
2017SubaruLegacy2.5i Sport2.5H4GASRear
2017SubaruLegacy2.5i2.5H4GASRear
2017SubaruLegacy3.6R Limited3.6H6GASRear
2017SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2017SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2017SubaruWRXBase2.0H4GASRearw/ Eyesight System
2016SubaruOutback2.5i Premium2.5H4GASRear
2016SubaruOutback2.5i Limited2.5H4GASRear
2016SubaruOutback2.5i2.5H4GASRear
2016SubaruOutback3.6R Limited3.6H6GASRear
2016SubaruWRXPremium2.0H4GASRearw/ Eyesight System
2016SubaruWRXBase2.0H4GASRearw/ Eyesight System
2016SubaruWRXLimited2.0H4GASRearw/ Eyesight System
2016SubaruLegacy2.5i Limited2.5H4GASRear
2016SubaruLegacy2.5i Premium2.5H4GASRear
2016SubaruLegacy2.5i2.5H4GASRear
2016SubaruLegacy3.6R Limited3.6H6GASRear
2015SubaruLegacy2.5i Limited2.5H4GASRear
2015SubaruLegacy2.5i Premium2.5H4GASRear
2015SubaruLegacy3.6R Limited3.6H6GASRear
2015SubaruLegacy2.5i2.5H4GASRear
2015SubaruOutback2.5i2.5H4GASRear
2015SubaruOutback2.5i Limited2.5H4GASRear
2015SubaruOutback2.5i Premium2.5H4GASRear
2015SubaruOutback3.6R Limited3.6H6GASRear
About ACDelco

When it comes to top-notch auto parts, one brand that stands tall is ACDelco. Popular for its commitment to quality and innovation, ACDelco has been a trusted name in the automotive industry. At Newparts.com, we're proud to offer a wide selection of ACDelco auto parts, including ACDelco spark plugs, ACDelco alternators, and ACDelco air filters, and other ACDelco parts, all at discounted prices.

ACDelco spark plugs are engineered to deliver exceptional performance and reliability, ensuring optimal engine operation and fuel efficiency. Whether you're cruising down the highway or navigating city streets, you can trust ACDelco spark plugs to keep your engine firing on all cylinders.

When it comes to power generation, ACDelco alternators are second to none. Designed to withstand the challenges of daily driving, ACDelco alternators deliver consistent power output to keep your vehicle's electrical systems running smoothly. With ACDelco alternators from Newparts.com, you can count on reliable performance mile after mile.

In addition to spark plugs and alternators, we also offer a range of ACDelco air filters to help keep your engine breathing clean, fresh air. ACDelco air filters are designed to trap dirt, dust, and other contaminants, preventing them from entering your engine and causing damage. With a high-quality ACDelco air filter from Newparts.com, you can enjoy improved engine performance and extended engine life.

At Newparts.com, we understand that getting the right parts quickly is essential. That's why we offer fast shipping on all ACDelco auto parts, so you can get back on the road with confidence. Plus, with our discounted prices, you can save big on the parts you need to keep your vehicle running smoothly. In case you want to purchase parts by phone, feel free to call us at 855-505-2886 and our customer service team will help you out. 

Whether you're in need of spark plugs, alternators, air filters, or any other ACDelco auto parts, Newparts.com has you covered. Shop our selection today and experience the quality and reliability of ACDelco for yourself.

Specifications
4.5
ABS Tone Ring IncludedNo
Bolt Circle Diameter (in)4.5
Bolt Circle Diameter (mm)114.3
Bolt Hole Quantity5
Center Hole Diameter2.28
Center Hole Diameter57.9
ConstructionFull Cast
Conventional Or Drum-In-Hat Type RotorConventional
Directional or Non-Directional Brake SurfaceNo
Disc FinishCoated
Disc FinishTurned
Discard Thickness0.59055118
Discard Thickness0.591
Discard Thickness15
FAQ - Answer 1Yes, ACDelco also offers GM OE brake rotor and Advantage brake rotors.
FAQ - Question 1Does ACDelco offer other grades of brake rotors?
Features & Benefits - Bullet 1Inspected for balance; resulting in smooth brake operation and noise reduction
Features & Benefits - Bullet 2Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
Features & Benefits - Bullet 3Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration
Features & Benefits - Bullet 4Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Features & Benefits - Bullet 5Premium aftermarket replacement part
Features & Benefits - Bullet 6Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
Good Maintenance Practices - Section 1 - Bullet 1Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Good Maintenance Practices - Section 1 - Bullet 2Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Good Maintenance Practices - Section 1 - Bullet 3Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Good Maintenance Practices - Section 1 - Bullet 4Check the thickness of your brake pads.
Good Maintenance Practices - Section 1 - HeaderThe following inspections and maintenance procedures can help prevent potential brake problems:
Good Maintenance Practices - Section 2 - Bullet 1Inspection of the brake hoses for brittleness or cracking.
Good Maintenance Practices - Section 2 - Bullet 2Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Good Maintenance Practices - Section 2 - Bullet 3Inspection of wheel bearings and grease seals.
Good Maintenance Practices - Section 2 - Bullet 4Parking brake adjustments (as needed).
Good Maintenance Practices - Section 2 - HeaderThe following should be conducted by a qualified technician:
Grade TypeRegular
Hat FinishTurned
Height1.8228346457
Height (in)1.822834646
Height (mm)46.3
Inside Diameter205.5
Inside Diameter8.09055118
Inside Diameter8.091
MaterialCast Iron
MaterialES100E
Mounting Bolt Hole Circle Diameter114.3
Mounting Bolt Hole Circle Diameter4.5
Mounting Bolt Hole Diameter0.512
Mounting Bolt Hole Diameter13
Mounting Bolt Hole Quantity5
Nominal Thickness0.669
Nominal Thickness0.66929133
Nominal Thickness17
Outside Diameter11.8031496063
Outside Diameter11.811
Outside Diameter300
Overall Height1.825
Overall Height46.35
Product DescriptionACDelco Gold (Professional) Disc Brake Rotors are a high quality alternative to Original Equipment (OE) parts. They feature a thickness variation that is less than 0.0004 to minimize pedal pulsation, noise, and help to extend brake pad life. These rotors meet the SAE standard for structural integrity with OE matched G3000 qualified material delivering guaranteed performance. Also, no machining is required. ACDelco Gold (Professional) Disc Brake Rotors are ready to be installed right out of the box. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov
Programming RequiredNo
Rust Resistant CoatingYes
Signs of Wear & Troubleshooting - Section 1 - Bullet 4Vehicle pulls to the left or right when brakes are applied.
Signs of Wear & Troubleshooting - Section 1 - Bullet 5Visible ridges or deep grooves on the rotor surface.
SlottedYes
Solid Or Vented Type RotorVented
Stud/Lug Hole Quantity5
Surface TypeSmooth
Warranty
We offer a 2-year warranty on all parts that we sell. If the part fails within 2 years of purchase, please contact us for instructions to replace it. The warranty does not cover normal wear and tear or improper installation. On many parts, we also offer Extend product protection, which is a way to add up to 3 additional years for 5 total years of worry free coverage. Select your preferred term length and you're covered!
Delivery & Returns

Delivery Info

Newparts.com is your go to store for all parts and accessories at the best price and delivered quickly. Every order we ship receives a tracking number so that you can watch it all the way until it reaches your door. We only ship using the major shipping carriers like FedEx, UPS and USPS to ensure quick and safe delivery of your new car parts order.

Returns Info

Newparts.com offers a thirty (30) day return for refund for all items purchased through Newparts.com. To qualify for return and refund, all items must be new and in their original manufacturers box. To initiate a return, please contact our customer service. This information is only a summary. Complete shipping and return policy information can be found in our web site policies.

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