
Why Ignition Cylinders Stick — The Real Causes Behind a Key That Won't Turn
When a key suddenly stops turning or requires significant force, most drivers assume the key is worn — and sometimes that is part of it. But the ignition cylinder itself is more often the culprit. Inside the cylinder, a series of spring-loaded wafers or pins must align precisely with the cuts on your key for the cylinder to rotate. Over years of use, those internal components accumulate grit, dried lubricant, and metal shavings from key wear. In the Texas heat that Shavano Park residents know well, temperature cycling causes metal parts to expand and contract repeatedly, accelerating this internal wear faster than in cooler climates. Add in the occasional wrong-key attempt or a key that was cut slightly off-spec, and the wafer stack can become permanently deformed.
Corrosion is another major factor, particularly in older vehicles that have sat for extended periods or that have had moisture intrude around the steering column. A locked steering column is also a frequent source of confusion — the steering wheel can mechanically bind the ignition cylinder, making the key feel completely seized even when the cylinder itself is fine. Our experienced technicians distinguish between these scenarios quickly, using professional diagnostic tools rather than force, which means we keep the surrounding trim, wiring harness, and steering column hardware intact wherever possible.

