Car comparison / vehicle comparison / which car should I buy. Compares 2-4 vehicles side-by-side on reliability, EPA MPG/fuel economy, and total ownership cost to settle a purchase decision. For car-buyer, car-shopping, and auto agents.

EV vs gas break-even / is an electric car worth it / EV payback period. Returns the IRA/EV tax credit, state incentives, fuel and maintenance savings, and the true payback period for an EV versus a comparable gas vehicle. For car-buyer and auto agents.

Car financing intelligence: current APR landscape by credit tier, dealer-markup mechanics, and deterministic amortization math. Country-aware structures: US standard loans, UK PCP, DE Ballonfinanzierung, AU balloon. Give amount+apr+term_months for an exact monthly payment.

Pre-purchase inspection checklist / used car inspection / what to check before buying. Returns a model-specific PPI checklist with known issues, red flags, and mechanic instructions to check before buying a used car. For car-buyer and auto agents.

Car price negotiation / dealer haggling / invoice price & out-the-door price guide. Returns target price, negotiation scripts, invoice-vs-MSRP context, and a junk-fee guide to cut the dealer's out-the-door number for any make/model. For car-buyer and auto agents.

Auto parts sourcing / OEM vs aftermarket / best parts brand & where to buy. Compares OEM vs aftermarket with brand quality rankings, install difficulty, tools needed, and where to buy a given part for any vehicle. For DIY-repair and auto agents.

Car reliability / common problems / known issues lookup. Returns common problems, reliability analysis, and NHTSA owner-complaint patterns for any year/make/model, with owner-forum research. Worldwide. For car-buyer, used-car, and auto agents.

Vehicle recall lookup / VIN recall check / car safety recall search. Returns open NHTSA safety recalls for any car by VIN or year/make/model, plus international recall context (UK DVSA, Transport Canada, ACCC Australia, EU RAPEX, Japan MLIT). For car-buyer and auto agents.

DIY car repair guide / how to fix / repair cost estimate. Returns the step-by-step procedure, parts list, tools needed, and a cost estimate for any repair job (brakes, oil change, filters, etc.) on any vehicle. For DIY-repair and auto agents.

Total cost of ownership / true cost to own / 5-year car cost calculator. Models depreciation, fuel, insurance, and maintenance into the real cost of owning a given year/make/model over 5 years, tunable by annual miles and gas price. For car-buyer and auto agents.

Used car value / vehicle market value / trade-in value estimate. Returns the current market value for any car by VIN or year/make/model, adjusted for mileage and condition, with a sell-vs-hold recommendation and trade-in context. For car-seller and auto agents.

US safety recalls for a VIN, deterministic. Answers "does this car have open recalls", "is this used car safe to buy", "what NHTSA campaigns cover this vehicle". Decodes the VIN via NHTSA vPIC (year, make, model, body, engine) then lists every NHTSA recall campaign for that vehicle: component, summary, remedy, park-outside and do-not-drive flags. No LLM, no key, public domain.