Short answer: roughly half of what you're hearing is outdated myth, and half is a real but conditional cost that most people never actually pay.
On hybrids. The routine-maintenance story is mostly wrong. Hybrids skip some belt-driven accessories, the engine shuts off at stops, and regenerative braking means brakes commonly last far longer than on a gas car. AAA's latest Your Driving Costs analysis puts hybrids among the cheapest vehicles to own overall and ranks them third-lowest for maintenance (behind EVs), with maintenance/repair/tire costs broadly in line with a comparable gas model. Oil changes are still needed — just often on the same schedule as the gas version.
Where the grain of truth sits is the high-voltage battery. Reports vary a lot by model, but typical replacements run somewhere in the $1,000–$6,000 range (some specialty/plug-in models are far higher), and many packs last 8–15 years or well over 100,000 miles. Most carry an 8-year/100,000-mile warranty, and longer in states that follow California emissions rules. So it's a real risk, but a late-in-life one, not an annual expense. Also worth knowing: a battery warning light doesn't always mean a new pack — sometimes it's a module, connector, or sensor issue.
On lane assist and auto-braking. These aren't maintenance items — no fluid, no scheduled service. The cost shows up only when something is damaged and needs recalibration or replacement. AAA's 2023 study found that in a windshield replacement scenario, the ADAS portion added about $360 to a $1,440 repair, and in a minor rear collision the ADAS parts were about $685 of a $1,698 estimate — roughly 38% of repair costs across the scenarios studied. Independent shop quotes for calibration alone range widely (roughly $150–$300 as an add-on in some estimates, more at dealerships). Treat those as ballparks, not quotes — actual pricing depends heavily on your make, model and how many sensors are involved.
Two practical notes: roughly a third to a half of vehicles now on the road with these systems have never had calibration checked, and dirty or snow-covered sensors cause false warnings that cost nothing to fix. Separately, insurance data suggests these systems prevent some low-speed crashes even as they raise the cost of the crashes that do happen — the net effect on your premium varies by carrier.
What I'd budget. For a new hybrid: plan on routine maintenance and tires similar to a gas car of the same size — call it $1,200–$1,700 a year if you drive about 15,000 miles — plus a separate battery fund of $2,000–$3,000 you build up over the first decade. For ADAS, don't budget annually; instead make sure you carry comprehensive glass coverage, since windshield replacement is the most common way those costs land on you. And ask for an itemized quote that shows calibration separately, so you can see what you're actually paying for.
I'd want to check your specific model's battery quotes and glass coverage before you set firm numbers.
