Across
1. Ignition-diagnosis instruments
8. Brake-system components, sometimes
9. Shifter selection
10. Allstate or State Farm
11. Wheel-alignment adjustment (3,2)
12. Andy Green’s ’97 supersonic car
14. Structures in non-unibody cars
17. Well-known Indy-racing family
19. Old-car noises, often
22. New engine’s initial ____ period
23. Word following backing or pressure
24. Turbochargers’ mechanically-driven cousins

Down
1. Electronic fault-finding system, briefly (1,1,1,1,1)
2. Police car, in other words
3. Alignment-machine beam, perhaps
4. Registration-document names
5. Dash-gauge grouping
6. Prize money paid by race promoter
7. Vanes in driveshaft’s sliding section
12. Entertainers’ transport, often (4,3)
13. Door-latch component on body
15. Odometer reading
16. Toolbox item
18. Wipers’ movement
20. Top to bottom cylinder-diameter variance
21. Car’s detailed design description, briefly