Bumper-to-bumper: Often called the basic warranty, a bumper-to-bumper policy covers virtually every component on a new car. Most exclude regular maintenance, like fluid top-offs and oil changes, but a few luxury brands — most notably BMW and Saab — have separate free-maintenance provisions. Bumper-to-bumper warranties usually expire faster than powertrain warranties. American and Japanese cars typically come with a 3 year/36,000 mile warranty while luxury and more upscale brands carry a 4 year/50,000 mile warranty.

Powertrain: Don’t be fooled, a 10-year or 100,000-mile powertrain warranty doesn’t promise a decade of free repairs for your car. It typically covers just the engine, transmission and drive axles. This represents about 20% of your vehicle. Some systems NOT covered include air conditioning, electronics, steering, suspension and high tech electronics.

Roadside Assistance: Most automakers include roadside assistance with their new car warranties. These programs cover anything from flat-tire changes and locksmith services to jump starts and towing.

Corrosion: This covers body panels that have rusted through. Such policies generally last five to six years and have no mileage limits. They only cover complete perforation — a relatively rare occurrence with today’s rust-proofing — so you’ll probably be denied a claim for sheet metal that’s only partially rusted.

Emissions: Since 1972, the government has required all cars to have emissions controls like oxygen sensors and catalytic converters. Two types of warranties exist: performance warranties and design and defect warranties. Performance warranties require automakers to repair or adjust emissions controls for at least two years or 24,000 miles if the car fails an emissions test. If emissions controls fail independent of a test, the design and defect warranty covers them for at least two years or 24,000 miles. Major components like catalytic converters and engine control modules are covered for performance and defects for eight years or 80,000 miles. On some items, California residents are eligible for additional coverage.

Hybrid components: Components in the hybrid drivetrain include the high-voltage battery pack along with the hybrid assist motor and the electrical connections in between.These components may be prohibitively expensive to repair or replace, so automakers offer generous warranties, in most cases 8 years and from 80,000 to 100,000 miles, whichever comes first.

Seat belts and airbags: A lot of carmakers include seat belts and airbags with powertrain or bumper-to-bumper warranties. Others make separate provisions, and the warranties sometimes carry no expiration date. Seat belts are generally covered for operating usability only, so don’t expect a replacement for discoloration or other cosmetic defects.

Administrator:
The company that authorizes and pays the repair facility for repair work to your vehicle. The administrator works with the repair facility to make sure your claim is handled properly. As they are the company that pays your claim, their financial strength is the most important factor in choosing a warranty company.

All Wheel Drive (AWD)
All four wheels are driven by the engine. AWD systems are superior to 4WD because they can be used under any road conditions. AWD systems use a center differential to allow the front and rear wheels to rotate at different speeds. AWD provides better traction than front or rear-wheel drive.

Auto Warranty:
See Extended warranty.

Basic Warranty:
The specific terms established by each manufacturer to repair vehicles through a specified mileage and/or time period. All factory installed and many dealer installed parts are covered under this warranty.

Better Business Bureau (BBB):
The Better Business Bureau (BBB) has long been a means consumers have used to check out a company. In order to participate in the BBB Online Reliability Program, a company must have a satisfactory complaint handling record, agree to participate in the BBB’s advertising self-regulation program, agree to abide by the BBB Code of Online Business Practices, and agree to dispute resolution with the BBB. Most of the companies who participate in this program value their standing in the BBB, and tend to do a better job at handling complaints

Bumper-to-Bumper Warranty:
The most comprehensive warranty you can buy. It will cover all parts of your vehicle and will only exclude a small list. Because the coverage is so comprehensive, it will only list the few parts not covered. Most similar to the manufacturer’s warranty.

Certified Car:
Many cars sold used or off lease are certified by the manufacturer. This means they have undergone a quality inspection process prior to sale. Often, a limited powertrain warranty is attached to them. Most do not have extended or bumper-to-bumper warranties. There is no industry standard for certification.

Claims Reserve Accounts:
An insured account that the administrator will maintain to pay future claims.

Consumable Items:
Parts such as tires, batteries, clutch plates and wiper blades that are generally not covered under any warranty.

Corrosion Warranty:
Covers rust through perforation on sheet metal. Offered as original warranty on new vehicles. Extended warranties do not cover corrosion.

Deductible:
The amount that you must pay the repair facility for work when vehicle is being repaired. Many plans are offered with a zero deductible option.

Drive Train:
The components that transmit the flow of power from the engine to the wheels. The components include the clutch, transmission, driveshafts (or axle shafts in front wheel drive), U-joints and differential.

Certification doesn’t come cheap. For luxury cars, the average premium charged is 7.8% of its price, or $3,400. That money will buy you a full bumper to bumper coverage for 4-5 additional years with lots of money left over.

For all the talk of 120+ point inspections, limited warranties, vehicle history reports and others, there is no data to suggest that CPO vehicles are any more reliable than their non-certified cousins. Given that, why pay more for “certification”?