Timing belt: the interval that is genuinely due
The cost of timing belt replacement runs from $367 to over $3,000 depending who you ask — and the first question is whether your car has a belt at all.
Due, at the manual's figure · Repair or replace
Tag
Maintenance Schedule
Serpentine belt replacement, and the noise that precedes it
Serpentine belt replacement cost runs under $215 nationally, and there is no mileage at which it falls due — the company selling it says so itself.
Condition, not mileage · Repair or replace
Synthetic against conventional, priced over a year of driving
Synthetic vs conventional oil, priced by the year not the visit: on KBB's own figures synthetic costs less annually at every mileage, to a price ceiling.
Synthetic, under $133 · Oil and fluids
Cooling system flush: what the service is worth
Cooling system flush cost averages $131 to $209, but the interval on the same page runs 30,000 to 100,000 miles. What decides which end of that you are on.
Due on the spec, not the year · Oil and fluids
Transmission fluid change: the interval nobody agrees on
Transmission fluid change cost runs $80 to $356 across three published sources. The quart count explains the spread; the manual decides if it is due.
Read the manual first · Oil and fluids
The oil change interval the manual gives, against the sticker
Your oil change interval is claimed by three documents: the manual, the windscreen sticker and the car's own monitor. Which governs, and why they disagree.
Manual, then monitor · Oil and fluids
Conventional, blend or full synthetic: what the upgrade buys
Conventional oil change cost against synthetic, priced per visit and then per 1,000 miles — where the gap nearly doubles, and then very nearly closes.
Per mile, a wash · Oil and fluids
Oil changes: what one costs and how often you actually need one
Oil change cost, from two published sources that differ by more than five times — and the parts figure one of them prints a few lines from its own shop price.
The interval, not the price · Oil and fluids
DOT 3 or DOT 4: whether the upgrade is worth paying for
DOT 3 brake fluid against DOT 4 on the federal standard's own boiling points — and why old DOT 4 is worse than fresh DOT 3 at the moment it matters.
Change, don't upgrade · Brakes
Brake fluid flush: due, or sold?
Brake fluid flush cost from three published sources, and why this is one service where the interval in the manual is usually a real due rather than an upsell.
Manual, not sticker · Brakes
What a brake job actually costs, and when it is not due yet
Brake pads replacement cost, taken apart into parts and book time — and the 2/32 inch measurement that decides whether the job is due at all.
Measure first · Brakes