Quick Answer: Expect to pay $50-150 for emergency locksmith service when your keys are locked inside a running car. AAA members pay nothing. This is a priority emergency due to theft risk, carbon monoxide danger, and potential engine damage from prolonged idling.
What To Do
- Call 911 if children or pets are inside the running vehicle
- Stay near your car to prevent theft and monitor the situation
- Contact roadside assistance first if you have AAA, insurance coverage, or manufacturer warranty
- Call a locksmith if no coverage available, specify it’s an emergency running vehicle
- Have ID ready to prove ownership when help arrives
- Move to fresh air if you smell exhaust fumes
Photo: Pexels
A few things worth knowing before help arrives. Carbon monoxide is odorless, so “I don’t smell exhaust” is not a reliable safety check. If you are standing within a few feet of the tailpipe in an enclosed space like a garage or a tight parking structure, move immediately. In open air you have more margin, but stay upwind of the exhaust just the same.
On the theft side: a running, locked car is an obvious target. Thieves can use a slim jim or even a relay attack on keyless-entry systems in under 30 seconds on many modern vehicles. Do not walk away to find a phone charger or grab a coffee. Plant yourself where you have a clear line of sight to the car the entire time.
Regarding engine damage: most modern engines are fine idling for 30-60 minutes under normal temperatures. Problems start when the coolant temperature climbs because the car is sitting in direct sun on a hot day, or if the fuel level is already low. Check your gauge through the window if you can. If the temperature needle creeps toward the red, call 911 instead of waiting for a locksmith.
What It Might Cost
With Coverage:
- AAA membership: Free service
- Auto insurance roadside: Usually free
- Manufacturer warranty: Often free for first few years
Without Coverage:
- Emergency locksmith: $75-150
- Standard locksmith: $50-100
- Mobile locksmith surcharge: $20-50 extra
- After-hours fee: Add $25-75
- Holiday/weekend premium: Add $50-100
Factors affecting price:
- Time of day and week
- Your location
- Car make and security features
- Locksmith availability
A few clarifications on those numbers. High-security vehicles, particularly German makes like BMW, Mercedes, and Audi with transponder-coded keys and multi-point locking bars, can push the bill toward $200 or beyond because the locksmith needs specialized decoder tools. Trucks with vertical door locks are generally faster and cheaper to open. If you are in a rural area more than 20 miles from the nearest town, expect a mileage surcharge on top of everything else, typically $1-2 per mile beyond a standard service radius.
When you call without coverage, get a firm quote before the tech leaves their shop. Reputable locksmiths will give you a total price over the phone. If they refuse to quote and only say “we’ll figure it out on-site,” call someone else.
Photo: Pexels
Common Questions
Q: Will the locksmith need to see proof that the car is mine? A: Yes, almost every legitimate locksmith will ask for a photo ID and your vehicle registration or insurance card before opening the car. Have those documents in your wallet or on your phone as a photo before you call, so you are not scrambling when they arrive.
Q: Can a running engine damage the lock mechanism or make it harder to open? A: No. The engine running has no effect on the door lock hardware itself. The locksmith uses the same slim jim, wedge, or air wedge technique regardless of whether the engine is on or off.
Q: What if I have a push-button start and the fob is inside, will the car eventually shut itself off? A: It depends on the make and model. Some vehicles with keyless ignition will idle indefinitely as long as the fob stays inside the cabin. Others will display a low-fob warning but keep running. A handful of models will shut down after 30-60 minutes as a fuel-saving measure. Do not count on the car stopping on its own. Treat it as if it will run until the tank is empty.
Stay Safe
- Never break a window near the exhaust pipe
- Don’t leave the scene unattended
- Watch for signs of carbon monoxide poisoning: headache, dizziness, nausea
- Keep your phone charged for multiple service calls
- Have backup contacts ready if first locksmith is unavailable
- Consider this a genuine emergency, not a routine lockout
Need roadside help? Visit Tow With The Flow for real answers when your car breaks down.