First suspect: the battery
Weak range, intermittent buttons, needing to stand closer than you used to — that’s a dying coin battery until proven otherwise. Most fobs open with a small flat tool or a hidden key blade slot; the battery type is printed on the cell itself. Swap it before you spend anything else.
If a fresh battery changes nothing, note exactly what works and what doesn’t — that pattern is the diagnosis. Buttons dead but the car starts? Remote half. Car won’t recognize the fob at all? Chip or pairing half.
Second suspect: the pairing
A fully dead battery, a jump-start spike, or electrical work can drop a fob from the car’s trusted list. The fob is fine — it needs re-introducing, which is a programming job. Our programming guide explains how pairing actually works.
Third suspect: the fob itself. Water, drops and worn button contacts kill electronics — in South Florida, the classic story is a fob that went swimming. A failed fob is replaced and programmed in one visit; see car key replacement.
The spare rule
However your fob trouble ends, end it with two working fobs. A spare made while one still works is the cheapest version of this story — our spare key guide makes the case in numbers-free, experience-based terms.
How this article connects
- ✓Key Fob Programming
- ✓Car Key Replacement — the service page
- ✓Transponder Keys
- ✓Spare Keys & Duplicates
Car key replacement, and every variant around it
The searches behind this guide, in one place: car key replacement, a lost car key, a car key fob that stopped working, key programming for push-to-start fobs, a transponder key, a spare car key, car key cutting to code, and a broken car key extracted without damage. One mobile visit handles the full set — call (561) 366-2611 and we will schedule your appointment.