Mechanical Breakdown Warranty Calculator
Extended car warranties (mechanical breakdown insurance, MBI) are highly profitable for sellers — most owners pay more in premium than they ever claim. This shows your break-even point.
| Lifetime warranty cost | — |
| Expected lifetime repairs | — |
| Warranty-covered portion | — |
| Deductibles paid (assume 1 visit/yr) | — |
| Net recovery | — |
| Net value (recovery − cost) | — |
Extended warranties (mechanical breakdown insurance, vehicle service contracts) cover repairs after manufacturer warranty expires. Industry data shows most buyers pay more in premium than they claim — the math rarely favors the buyer.
Manufacturer vs Third-Party
Manufacturer extended warranty (Toyota Plus, Ford ESP, Honda Care) honored at any dealer, broader coverage. Third-party (Endurance, CarShield) cheaper but with more exclusions and worse claims experience. ConsumerReports rates manufacturer warranties significantly higher.
Coverage Tiers and Exclusions
Powertrain only (engine + transmission), Stated component (named parts), Exclusionary (everything except listed exclusions — gold standard). Most third-party warranties are stated-component with long exclusion lists, leaving claims often denied.
Deductibles and Per-Visit Costs
Per-visit deductibles ($100-250 typical) apply each time you submit a claim, not annually. A single bad week with a transmission AND alternator failure = 2 deductibles. Some warranties have escalating deductibles after first claim.
Self-Insurance Alternative
Bank the $2,400 warranty premium in a high-yield savings account at 4-5% APY. After 5 years: ~$2,950. Most owners spend less than that on repairs. The math: only buy warranty if you can't absorb a $3K-5K repair surprise.
Last updated May 2026. Sources: ConsumerReports Extended Warranties, FTC Service Contracts.