That's what I thought surfhb. Maybe I should stick with the original plan. Although I have spent $2800 this year on repairs/maintenance. I wonder if that would have been much less with a Toyota. I did just FIRE and had a 56 mile round-trip commute for most of the year, so now my maintenance costs should go down.
Unless you really enjoy the car, and exclusively based on a monetary perspective, I would sell it now.
In 6 years of ownership (assuming it was bought new), you already absorbed most of the fastest depreciation rate of the car. Now, the depreciation rate on this car is going to be a lot more ''flat'' then it was. A good way to counter that effect would be to keep the car as long as possible to even out that rate as you seem to have initially planned, which is a good idea.
But, if you want to save even more money and absolutely keep a car, here's what I think you should do. Assuming you have is a semi-luxurious European car, I would sell the car now that it still has quite low mileage/good resale value and get a low mileage, well maintained Japanese econobox. I wouldn't spend more than what you sell your actual car for, and preferably less. Try to find something 6+ y.o. in order to also get the lowest depreciation rate as possible.
With this type of cars, basically everything gets cheaper. You will save on insurance, gas consumption, gas type, parts and maintenance. These car also keep a good resale value, so you might pay a little more to buy now, but the car will depreciate less over the years. On the other though, you might lose some of the comfort and driving pleasure that you actually have.
Toyota's, Honda's, Nissan's, are good examples of extremely reliable cars that basically only cost gas and periodic oil change.
That being said, keeping your actual car for a long period of time isn't a bad decision either, especially if you commute less. Keep it might though that as the years go, you can expect some non-negligible maintenance as some components wear out with time (rust for example) even if you drive less, and they can get expensive of some car models.
I would be happy to help further if needed.