How to use this quiz
Answer the 6 questions on age and mileage, last year's repair costs, perceived reliability, fuel efficiency, financing readiness, and lifestyle changes honestly. Each is scored 0-3, with three answers carrying particular weight: an older vehicle with high mileage, annual repairs above $2,000, and a feeling of unreliability push strongly toward replacement. Be brutally honest on the reliability question — "something always feels off" or being stranded is a safety signal, not just a financial one. On the financing question, don't answer based on hope; check your actual credit and pre-approval before you interpret the result.
What your result means
65+ means the financial and practical case for replacing is strong — repair costs and fuel inefficiency are likely costing more than a newer vehicle's monthly cost of ownership. 35-64 means mixed signals; the practical compromise is to set a decision deadline (e.g., the next repair over $500, or hitting a specific mileage milestone) rather than letting indecision drift. Below 35 means your car is in its sweet spot — depreciation has slowed, reliability is solid, and keeping it (with continued preventive maintenance) is likely the financially smarter move. The single most decisive rule embedded in the scoring: when annual repair costs approach half the car's market value, replacement usually makes financial sense — check Kelley Blue Book, Edmunds, or CarMax for actual current value.
When to trust it
This quiz gives a directional nudge, not a purchase recommendation. It can't see safety recall history (check the NHTSA vin lookup for your vehicle), crash-test ratings of either car, your actual insurance quotes for the new model, total cost of ownership including depreciation, or whether a used car you're considering has hidden damage. Before buying, get an independent pre-purchase inspection from a mechanic who works for you (not the seller), compare financing offers from a credit union and at least two lenders, and run the real numbers through a car payment calculator with current rates. For EV or hybrid decisions specifically, factor in charging installation costs and local electricity rates — they change the math considerably.
Frequently Asked Questions
Repair or replace: how do I decide?
Start with the annual-cost test: if this year's repairs exceed a year of payments on a replacement you'd actually buy, replacement is winning. Then adjust for the two wildcards — reliability trajectory (a car needing one predictable $1,200 repair at 150k miles is different from the third surprise in a year) and your tolerance for the next breakdown being a tow. The classic trap is fleeing a single big bill into five years of payments: a $3,000 repair is roughly four months of a typical new-car payment, not a down payment.
At what mileage does replacing usually make sense?
There's no cliff — modern cars routinely run past 200k — but the economics shift around 150-180k: repairs get bigger (transmissions, timing chains, suspension), insurance-plus-maintenance math starts rivaling depreciation on something newer, and safety-feature gaps widen. The decision point isn't the odometer; it's when annual repair spend becomes unpredictable in size and frequency. A car you can budget $1,500/year to keep alive usually beats $6,000/year in payments.
Should I sell privately or trade in?
Private sale typically nets 10-15% more — worth it for common, presentable cars where a weekend of test drives and paperwork is tolerable. Trade-in wins when the car has issues you'd have to disclose or fix, when your state's sales tax structure credits trade-in value (taxes only the difference in some states — this closes much of the gap), or when your time and strangers-in-your-driveway tolerance is genuinely worth a few hundred dollars. Never tell the dealership you're trading until you've negotiated the new car's price separately.