Across
1. Auto-paint layer (4,4)
5. Cylinder-head fastener
9. Well-known Kawasaki motorcycle model
10. Tire’s height-to-width ratio, in a word
11. Big-rig tractor’s built-in bunk
12. Dual- or triple-axle assembly
13. Used-car transaction
15. See 1-Across clue
18. Automatic-transmission car’s motion at idle
20. Rejuvenates a flat battery
23. Porsche model
24. Remove air from brake system
25. Trucker’s CB query, "Got your ____ on?"
26. Disassemble an engine, in other words (4,4)

Down
1. Automatic-transmission items, sometimes
2. Dash-gauge components, commonly
3. Battery-cable terminal, commonly
4. Unit of auto-electric current
6. Circular seal (1,4)
7. Tire-tread trouble type (3,4)
8. Middleman in auto-parts supply chain
13. Retread a tire, in other words
14. Seated a valve using paste
16. Battery-less race engine ignition system
17. Gasoline’s anti-knock rating
19. Driver ____, common accident cause
21. It’s between red and green
22. Auto-body style