Are hybrid cars expensive to maintain and repair?

I'm looking to get a new car next year. I'm not looking to save the enviroment or anything like that. I just want to save money on gas. I'm looking at the 2013-2016 Ford Fusion Titanium. I know purchase price can be more expensive but, what about the maintenance and repairs? I knew someone who worked at a Ford dealer in 2005 when the Escape Hybrid came out. He said battery replacements were around $10,000. I know it's been 12 years so, it may be cheaper now. Is the hybrid worth it for an extra 10-15MPG? Are they expensive to own or maintain?

Added (1). That extra 10-15 MPG can make a huge difference on the miles per tank and on the open road.

Have educated adults locally explain how to figure it out for you.
you don't give us any Real world numbers.

You have no worries about the main traction battery.

Although many manufacturers warranty them to 100k miles, they very rarely fail and the most common cause is when the battery gets damaged during a serious collision or is damaged by floodwater.

Regulators ensure the battery has an easy life: it never gets close to being truly depleted, even when it registers as empty, and most never get charged to more than around 80% full, even when they show as being 100% charged.

As for the rest, maintenance if anything is cheaper. The engine doesn't work as hard because it's not running all the time. Hybrids also include additional exhaust gas heat exchangers to ensure the engine reaches full operational temperature more quickly than normal. There's no clutch because they're all automatics, often using computer controlled CVT transmissions, and unlike the earliest mechanical CVTs the drivebelts usually last the lifetime of the car. Regenerative braking means less wear on the brakes.

The batteries are more in the range of $1700. Still, that buys a lot of gas. And they Do wear out. My brother's Honda hybrid is ready for a new battery pack. They don't last forever and there's nothing you can do but replace them. Or cut a big hole and put in lead acids, which only last 5 years and you need golf cart type.

No

It depends on how long you plan on keeping the vehicle. 0 - 5 years up to 100,000 miles should be no problem. Beyond that there's no way to determine.

Nope