Symptoms › Car won't start (clicking or nothing happens)

🔑 Car won't start (clicking or nothing happens)

You turn the key or push the button and hear clicking, a slow crank, or silence. Jump to the card to show your mechanic ↓

Not a diagnosis. This explains common causes so you can ask better questions. A technician who inspects your car is the only one who can diagnose it.

What you're noticing

Likely causes (most to least likely)

  1. A weak or dead battery. The most common cause, especially in cold weather or after the car sat. Rapid clicking and dim lights point here. A battery that tests fine but keeps going dead can mean something is draining it while the car is parked.
  2. Loose or corroded battery cables. White or green crust on the battery posts, or a loose clamp, can stop power from getting through even with a good battery. Often a cheap fix.
  3. An alternator that is not charging. The alternator recharges the battery while you drive. If it fails, the battery runs down. Clues are a battery warning light, dim or flickering lights while driving, or a car that dies on the road.
  4. A bad starter. The starter is the motor that spins the engine. One click with bright dash lights can point to the starter, but RepairPal notes a no-start is not always the starter. A fuse, ignition switch or solenoid can do the same thing.
  5. Something simple. Automatic not fully in Park, a dead key-fob battery on push-button cars, or a blown fuse. Your owner's manual explains your car's no-start steps.

Safe to drive?

Not dangerous if the car is parked somewhere safe. Get the battery tested before buying parts.

  • If you are stuck on a road or shoulder, turn on your hazard lights, stay out of traffic, and call for roadside help.
  • Do not touch a battery that is cracked, leaking, swollen, or hissing, and do not try to jump it. Call for help.
  • If you jump-start the car, follow the steps in your owner's manual. Some cars have special jump points.
  • If the battery light comes on while you are driving, head to a shop or home. The car may die once the battery runs down.

Fair price ranges

JobPartsLaborTotal
Battery replacement$394–$403$61–$90$456–$493
Starter replacement$375–$516$191–$280$565–$796
Alternator replacement$613–$800$196–$288$809–$1,088

Source: RepairPal Fair Price Estimator (national averages, estimates last updated Sep 3, 2026; excludes taxes, fees and your location). Checked October 24, 2026. Get it tested before you pay for anything. AutoZone says it tests and charges batteries for free, and tests alternators and starters for free (starters usually have to be removed first; availability varies by store). Battery prices vary a lot by car, and some batteries in trunks or under seats cost more to install.

Questions to ask

Upsells to question

👋 Hand this to your mechanic

Re: Car won't start (clicking or nothing happens). Only do this:

  1. My car [clicks / cranks slowly / does nothing] when I try to start it.
  2. Please test the battery, cables, alternator and starter first, and show me the results.
  3. Only replace the part that failed the test. Written estimate before any work.
  4. Call me before doing anything else. Please return my old parts.

From greasemonkeylingo.com

Helpful tools

Many auto parts stores test batteries for free. Do that before you agree to a paid diagnosis.
Jump starter pack: recommendations coming soon.

Sources

Last reviewed October 24, 2026. How we research · Affiliate disclosure