Absolutely nothing except for a steering linkage ($90).
I find this car to have good performance, along with excellent fuel economy.
I have found it to be very reliable, the engine takes about a quart of oil every 3000 miles.
The paint has lasted well for the 12 years the car has been on the road, and the interior is ergonomically designed and quite comfortable.
This 1988 ford tempo is the very best car I have ever owned. I drive it long miles every day and I know I have over 239000 miles on it and still runs like a top.