For those worried about the hybrid components, Toyota is offering a pretty solid warranty on the new 4Runner. You can see below the coverage they will offer from the factory. I am sure there will be extended options available too.
Toyota’s 36-month/36,000 mile basic new-vehicle warranty applies to all components other than normal wear and maintenance items. Additional 60-month warranties cover the powertrain for 60,000 miles and against perforation from corrosion for 60 months with no mileage limitation. Hybrid-related components that require repairs needed to correct defects in materials or workmanship are covered for 8 years/100,000 miles, whichever comes first from the original date of first use when sold as new. The hybrid battery is covered for 10 years/150,000 miles, whichever comes first, and is transferable across ownership.
The 2025 4Runner also comes with ToyotaCare, a plan covering normal factory scheduled maintenance, for two years or 25,000 miles, whichever comes first, and 2 years, of unlimited mileage of Roadside Assistance.