When to Replace What?
General intervals. Always check your owner's manual — driving style and climate matter.
| Part | Interval | Don't Ignore Because… |
|---|---|---|
| Engine oil + filter | 5k–7.5k miles / 6 mo | Sludge kills engines ($5k+ failure) |
| Brake pads | 30k–70k miles | Worn pads destroy rotors, double the cost |
| Brake fluid | Every 2 years | Absorbs water → longer stopping distance |
| Air filter | 15k–30k miles | Clogged = less power, worse MPG |
| Cabin filter | 15k–20k miles / yearly | Bad smell, weak AC, foggy windows |
| Spark plugs | 30k–100k miles | Misfires, rough idle, check-engine light |
| Timing belt (if equipped) | 60k–100k miles | If it snaps, engine can be destroyed |
| Coolant | 30k–60k miles / 5 yr | Overheating warps cylinder head |
| Transmission fluid | 30k–60k miles | Slipping gears, expensive rebuild |
| Tires | 6 yr max / 2/32" tread | Hydroplaning + blowout risk |
| Battery | 3–5 years | No-start, usually at the worst time |
| Serpentine belt | 60k–100k miles | Powers alternator, AC, power steering |