What the Job Is and What Is Included
Most key cars have two parts that people call the ignition. The lock cylinder is the mechanical part your key goes into. The ignition switch is the electrical part it turns, usually on the back of the lock housing or on the steering column. The switch has contacts for accessory, run, and start.
Over time those contacts burn and wear, and the springs inside get weak. The switch then loses contact in run, or does not send power to the starter in start. Heavy key rings speed this up, because the weight tugs on the switch every time you hit a bump.
A fair quote includes testing power through the switch in each position, removing the column covers, replacing the electrical switch, checking the airbag light and all accessories after, and programming keys if your car needs it. If the lock cylinder is also worn, that is a separate part and a separate line on the quote.
Why the Price Runs From About $100 to $600
Which part failed is the first factor. An electrical switch alone on an older car can be $25 to $60 in parts. A lock cylinder with keys, or a combined switch and lock assembly, can be $150 to $250.
Key programming is the second factor. Many cars since the late 1990s use a transponder key. If the lock cylinder or the antenna ring around it is replaced, the keys may need programming. Some cars can do it with a simple procedure. Others need a dealer or locksmith scan tool, which can add $50 to $150.
Access is the third factor. Some switches sit in plain sight once the column covers come off. Others are on top of the column, and the column has to be lowered.
Push button start cars are a different job. The button, the start module, and the immobilizer all work together, and parts can cost several hundred dollars before coding. That can push the bill past the top of this range.
Is It the Switch? What Else Causes the Same Problems
A no crank or a stall has many causes, and the ignition switch is often blamed for problems it did not cause.
A weak battery or a loose battery cable is the most common one. If the dash dims when you turn the key, test the battery first. Many shops do this free.
A bad starter or starter relay causes a click with no crank. A failed neutral safety switch or clutch switch stops the starter from getting a signal at all. Try starting in neutral on an automatic.
An immobilizer fault can let the engine crank but not run, or shut it off after a second or two. A flashing security light is the clue. The fix may be a key, not a switch.
On push button cars, a weak fob battery, a bad brake light switch, or a low 12 volt battery causes most no start problems.
A good tech checks voltage at the switch output in each key position. That test shows whether the switch is the real failure.
- Weak battery or corroded battery cables
- Bad starter motor or starter relay
- Neutral safety switch or clutch switch out of adjustment
- Immobilizer or key chip not being read
- Brake light switch on push button start cars
- Worn lock cylinder that will not turn, not an electrical fault
- Loose ground or main power wire under the dash
What Gets Done at the Same Time
If your key sticks or is hard to turn, the lock cylinder is worn too. Replace it with the switch while the column is open, and plan for key cutting or programming.
Check for open recalls before paying. Ignition switches have been the subject of major safety recalls, including a well known 2014 recall on several GM small cars. A recall repair is free at the dealer. Run your VIN on the NHTSA recall lookup first.
If the starter is slow or clicks, test it now. A weak starter can feel like a bad switch.
An airbag light that stays on after the job usually means a plug near the clockspring was not seated. That should be fixed at no charge before you leave. Do not pay extra for a new clockspring unless the light was already on or the horn and steering wheel buttons have stopped working.
Questions to Ask Before You Approve the Quote
These questions sort out a real ignition switch failure from a battery, starter, or key problem.
- Did you test voltage out of the switch in run and start?
- Is it the electrical switch, the lock cylinder, or both?
- Will my keys need to be cut or programmed, and is that in the price?
- Did you check my VIN for an open recall on the ignition?
- Did you test the battery and starter?
- What brand is the switch, factory or aftermarket?
- What is the warranty if the car stalls again?
Can a Mobile Mechanic or Locksmith Do It?
Yes, on most key cars. The electrical switch and the lock cylinder are both dash and column jobs that need no lift. A mobile mechanic can test and replace the switch in your driveway, which also saves a tow if the car will not start.
If the job needs new keys cut or programmed, an automotive locksmith is often faster and cheaper than the dealer. Some mobile mechanics and locksmiths work together on these. Push button start and European coded systems may still need a dealer scan tool.
How to Make the New Switch Last
Lighten your key ring. A heavy ring hanging from the key pulls on the switch every bump and wears it out early.
Do not crank the starter for long stretches. Long cranking heats the switch contacts. If the car does not start in a few seconds, stop and wait. A quality switch treated this way can last well over 100,000 miles.
Signs you need this repair
- Engine shuts off while driving, often over bumps
- Turning the key to start does nothing, but the dash lights work
- Dash, radio, or accessories flicker or cut out when you move the key
- Car starts only when you jiggle or hold the key in a certain spot
- Key turns but the car will not crank, or will not return from start to run
- Warning lights flash on and off while driving
- Key will not turn or is very hard to turn, a sign the lock cylinder is worn
Cost by vehicle type
| Vehicle | Typical range | Notes |
|---|---|---|
| Compact / economy car | $95 to $560 | Older key cars usually have a cheap electrical switch on the back of the column. Labor is about an hour, and this is the low end of the range. |
| Midsize sedan / small SUV | $100 to $600 | Most use a key with a transponder chip. The switch itself is often simple, but if the lock cylinder or immobilizer ring is the problem, key programming can add cost. |
| Full-size truck / large SUV | $115 to $700 | Many trucks put the electrical switch on top of the steering column, hidden under the dash. Access means lowering the column on some models, which pushes labor toward two hours. |
| Luxury / European | $140 to $855 | Many German cars use an electronic ignition lock or start module tied to the immobilizer. Parts can run several hundred dollars and need coding, so expect the top of the range or higher. |
| Hybrid | $110 to $660 | Most hybrids use push button start. A no ready condition is usually a key fob, brake switch, or 12 volt battery issue before it is a switch problem. Test those first. |
| Electric vehicle | $115 to $690 | Push button start only. Most no start complaints on EVs trace to a weak 12 volt battery or a fob problem. True switch or module failures are dealer jobs. |
| Diesel / heavy duty | $135 to $830 | Work trucks see heavy key use and heavy key rings, which wear switches faster. Parts are similar to gas trucks, but column access and glow plug circuits can add diagnosis time. |
Ranges assume national-average labor rates ($95, $140/hr) and quality aftermarket parts.
Cost by state
State ranges reflect typical independent-shop labor rates for a midsize vehicle.
Common questions
How much does an ignition switch replacement cost?
Most drivers pay about $100 to $600 at an independent shop. An electrical switch on an older key car is near the bottom. A lock cylinder with key programming, or a push button system, is near the top or higher.
Can I drive with a bad ignition switch?
It is not safe if the car has shut off while driving. You can lose power steering assist and, on some cars, airbag power. If it only gives trouble when starting, you can drive carefully, but expect to be stranded soon.
What is the difference between an ignition switch and an ignition lock cylinder?
The lock cylinder is the mechanical part your key turns. The ignition switch is the electrical part behind it that sends power to the car. A key that sticks points to the cylinder. Power that cuts out points to the switch.
Do I need new keys after replacing the ignition switch?
Usually not if only the electrical switch is replaced. If the lock cylinder is replaced, you either get new keys or the shop rekeys the cylinder to match your old ones. Transponder keys may need programming.
Is my ignition switch covered by a recall?
It might be. Run your VIN on the NHTSA recall lookup or ask any dealer for your brand. If there is an open recall, the dealer replaces the part for free.
Can a locksmith replace an ignition switch?
Many automotive locksmiths replace lock cylinders and program keys, and some also do the electrical switch. They are often cheaper than a dealer for key work. For electrical diagnosis, a mechanic is usually the better first call.
Why is a dealer ignition switch quote so much higher?
Dealers often quote a full lock and switch assembly with factory keys and programming. An independent shop may only need to replace the electrical switch. Ask each shop which part they plan to replace.
Related Repair Guides
More Electrical Repair Costs
Sources and further reading
Primary sources behind this page. Federal safety, emissions and consumer-protection references, worth reading before you authorize any repair.
- California Bureau of Automotive Repair Your rights on written estimates, approvals, and keeping replaced parts.
- ASE: Automotive Service Excellence Look for ASE certified techs, including the electrical and electronic systems certification.
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