Ignition Switch
moderate DIY~2h jobWritten in plain English and reviewed by the eli5cars editorial team · Last reviewed June 2026
What it does
The ignition switch is the electrical control behind your key cylinder or push-button. When you turn the key or push the button, the ignition switch is what sends electrical signals to the starter, ECU, and rest of the car's systems. On older cars it's a physical switch connected directly to the key cylinder; on modern cars it's an electronic module. When it fails, it can't properly signal 'Start' to the rest of the car, so you get no crank, intermittent no-starts, or the engine suddenly dying because the switch drops the 'Run' signal mid-drive.
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DIY Cost
~$45
parts only
Shop Cost
~$260
parts + labor
Estimates only — real prices vary by region, vehicle, and shop. Updated 2026.
Buy the part
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So what do I do now?
Three honest paths for fixing ignition switch — pick the one that fits your time, tools, and risk tolerance.
Door 1 — DIY it
We don't have a curated parts/tools list for this repair yet. Based on its moderate difficulty rating, this is doable for someone with some DIY experience — expect to need more than basic hand tools.
Door 2 — Buy the part
Already have someone lined up to install it (or handy friend), and just need the part?
Search Ignition Switch on AmazonHeads up: some links below are affiliate links (including Amazon Associates) — if you buy through them we may earn a small commission at no extra cost to you. Details: /disclosure.
Door 3 — Go to a shop
Fair price band
$195–$325
parts + labor, typical US pricing
Ask the shop
- Are the parts OEM or aftermarket?
- Is the diagnostic fee waived if I approve the repair?
- Can I get an itemized estimate before you start?
- What warranty do you offer on the labor?
Frequently asked questions
How do I know if it's the ignition switch or the key cylinder causing problems?
The key cylinder is the mechanical part you insert the key into — it can wear out and fail to turn or feel loose. The ignition switch is the electrical component behind it. If the key turns smoothly and accessories come on normally but the starter doesn't engage, the electrical switch is faulty. If the key is stiff or won't turn, the cylinder itself needs service.
Can a bad ignition switch cause the car to stall while driving?
Yes — if the ignition switch is failing in the 'Run' position, it can momentarily drop power to the fuel pump or ECU, causing a sudden stall. This is more common on older vehicles with high-mileage key cylinders that have worn contacts in the electrical switch.
Is replacing an ignition switch a DIY job?
It depends on the car. On many older vehicles the switch is under the steering column, accessible after removing a few trim pieces — a 2-hour job for a competent DIYer. On modern vehicles with push-button start, the 'switch' is an electronic control module that may require dealer programming. Check your specific vehicle before attempting.
Does a bad ignition switch set check engine codes?
Usually not — the ignition switch failure is an electrical supply problem that happens before the ECU even gets power. A free OBD2 scan is still worth doing to rule out other causes, but a failing ignition switch won't typically store its own code.