Learn About CornerStone Extended Warranty

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CornerStone Extended Warranty—Claiming It Is Just Around the Corner!

CornerStone United is a company that provides warranties for cars, marine craft, powersports, and recreational vehicles. The company offers its service via dealers and manufacturers.

In case you are looking for an extended warranty for your used car, check out what extended warranty plans CornerStone provides.

CornerStone United Extended Warranty in a Nutshell

CornerStone offers two kinds of extended warranties:

  1. Auto Main Program
  2. Recreational Vehicles Program

CornerStone Auto Warranty Extended Plans

You can find two extended auto warranty plans at CornerStone. The plans refer to different kinds of vehicles but have the same coverage options.

Extended Warranty PlanVehiclesCoverage
Xtended AutoUsed vehicles, regardless of the age or mileageBasic level:
  • Engine and transmission
  • Cooling
  • Fuel delivery
  • Seering
  • Suspension
  • AC compressor
  • Brake
  • Electrical coverage
  • Drive axle

Additional levels:

  • Powertrain Plus covers the engine, transmission, drive axle, cooling, and fuel delivery
  • Advantage covers steering, suspension, and Powertrain Plus components
  • Supreme covers everything in the Advantage level and AC compressor, electrical, brakes, seals, and gaskets
Extended CareVehicles with high mileage

CornerStone RV Extended Warranty

CornerStone also provides an extended warranty for recreational vehicles:


Motorhomes, fifth wheels, slide-in campers, horse trailers, travel trailers, pop-up campers, park models, and utility trailers


Vehicles that are up to 15 years old or have a mileage of 100,000

Term duration

Up to seven years


From $0 to $500


Select Coverage
  • Motorhome Chassis—engine, diesel engine, transmission, transfer unit, steering, brakes, air conditioning, drive axle assembly, fuel delivery, and electrical
  • Motorhome Coach—waste system, water heater, freshwater system, air conditioning, electrical system, audio system, leveling system, refrigerator, heating system, auxiliary power plant, and ventilation and exhaust fans

Ultimate Coverage

  • Everything from Select Coverage apart from components such as exhaust system, tires, wheels, rims, batteries, carpeting, flooring, and paint


  • Towing
  • Service calls
  • Food spoilage reimbursement
  • Protection all across the U.S. and Canada

How To Claim CornerStone Warranty on Your Own

If you want to file a CornerStone warranty claim, you will have to contact your dealer. The dealer should submit your warranty claim to CornerStone.

How To File a CornerStone Warranty Claim With DoNotPay

If you don’t want to go through the process of claiming a CornerStone warranty on your own, use DoNotPay! Our app will help you file a warranty claim in a few clicks! All you need to do is:

  1. Set up your DoNotPay account in any
  2. Choose the Claim Warranty feature
  3. Select Car Warranty
  4. Provide a few details about your CornerStone warranty
  5. Hit Submit

We will send a claim letter to CornerStone after we receive your request. The company will contact you directly to tell you the results of your case.

With our app, you can also claim:

You can also use our app to read home warranty reviews and get help with finding the best home warranties in America.

We can help you with other warranty issues, such as when a dealer refuses to cancel your extended warranty.

Appeal Your Denied CornerStone Warranty Claim via DoNotPay

If CornerStone rejects your warranty claim, get DoNotPay’s help to file an appeal! We will rely on implied warranty laws to make a strong appeal letter and send it to the company on your behalf! What you need to do is:

  1. Log in to DoNotPay in any
  2. Open Claim Warranty
  3. Select Appeal a Denied Warranty Claim
  4. Answer the questions about your original CornerStone warranty claim
  5. Click on Submit

CornerStone should contact you to provide more information about your case.

DoNotPay Can Solve Your Bureaucratic Issues the Easy Way

DoNotPay is the world’s first AI Consumer Champion and the winner of the American Bar Association’s Louis M. Brown Award for Access.

Besides solving warranty issues, DoNotPay can help you with other administrative tasks, such as canceling Crew Carwash or Clean Freak Car Wash service.

We can also help you schedule a DMV appointment in any state, including Michigan, Arizona, Florida, and North Carolina.

We have much more in store for you! Open DoNotPay in any and use our help to:

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