My car has low miles but when I take the car in for normal matainence, they find more issues. I just changed my oil and ended up replacing vacum pump and hose clamp. A week later my check engine light is on with a message - increase emission.
The repair shop continues to find problems. on 2004 BMW 645Ci
You car is 8 years old and things do break. Better to have the shop find them before your broken down on the side of the road. If you don't trust the shop, get a second opinion.