The Bumper Automotive Guide

Forensic advice for buying, maintaining, and protecting your vehicle.

I am BUYING a car

Don't get ripped off. Get the used car inspection checklists, negotiation scripts, and scam warnings you need to win.

I OWN a car

Take care of your car. Learn the maintenance secrets and repair tips that keep your car running well.

Articles For You

Switch between buying and ownership, narrow by topic, or search the library—same forensic lens as the rest of Bumper Car Advice.

The Federal Vehicle-History System Is Busier Than Ever: But Its Own Participants Say It's Full of Blind Spots

NMVTIS logged its highest search volume ever in FY2024, but states like Texas, Indiana, and Wisconsin admit to data gaps, missing brands, and reporting errors. See what the federal report doesn't tell buyers.

Yo-Yo Financing: The Dealer Tactic That Unwinds Your Deal After You Drive Home

Learn how yo-yo financing works, why dealers use it after the sale, and how to protect yourself from worse loan terms.

Odometer Rollback Fraud: How to Detect It Before It Costs You Thousands

Odometer fraud inflates value by rolling back mileage. Learn how it works, why digital isn’t safe, and how VIN checks expose the real mileage.

Curbstoning: How to Spot Unlicensed Dealers Posing as Private Sellers

Curbstoning is when unlicensed dealers pose as private sellers to avoid rules and sell risky cars. Learn how to spot and avoid them.

Trade-In Strategy: How to Get What Your Car Is Actually Worth

Learn how to handle a trade-in separately, track the real numbers, and avoid losing value in bundled dealer negotiations.

Dealer Fees Explained: Which Are Legitimate, Which Are Negotiable, and Which to Refuse

Car fees can be legitimate, negotiable, or hidden. Learn to identify each type so you only pay what’s valid and avoid unnecessary charges.

Bumper provides forensic automotive advice to help consumers make informed decisions. Whether you're buying your first car or maintaining a fleet, our expert guides cover financing, inspections, negotiations, maintenance, repairs, recalls, and emerging automotive technology.