A key fob that no longer responds reliably is one of the most common calls we receive. Before you spend hundreds of dollars on a replacement, give us a call — in many cases a key fob can be repaired rather than replaced, saving you significant money. Mobile Auto Locksmith Hamilton carries the parts and tools to fix cracked casings, worn buttons, failed batteries, and corroded circuit boards at your vehicle. Plenty of people ring us asking about a car remote rather than a key fob — same thing, same repair. We fix remotes wherever we can, and do car key remote replacement when one is beyond repair.
“Lost the only key to my Hilux on a Friday afternoon. New key cut and programmed in my driveway by Saturday morning — and it cost half what the dealer quoted. Will absolutely call again.”
Key fobs take a lot of punishment — dropped on hard floors, exposed to weather, rattled around in bags and pockets for years. The most common faults we see are:
Repair makes sense when the transponder chip and circuit board are intact. In these cases, we fit a new casing, new button pads, or clean corroded contacts — the key is reassembled with the original working electronics. No reprogramming is needed because the chip has not changed.
Replacement makes sense when the circuit board is damaged, the transponder chip has failed, or the fob is so old that the electronics are no longer reliable. We will be honest with you — if repair is not the right answer, we will tell you and quote for a replacement.
Before anything else, replace the battery. Most key fobs use a CR2032 coin cell — they are available from any supermarket or service station for around $5. The battery cover is usually on the back of the fob (press with a coin and twist, or use a small flathead screwdriver to pry open).
If a new battery does not restore full function, the problem is inside the fob. Call us at that point.
A customer in Dinsdale called us about his 2019 Hyundai Tucson key fob. Two of the four buttons had stopped responding completely and the casing had a crack along one edge from a concrete floor drop six months earlier.
We examined the fob and found the button pad had lost contact in two positions and moisture had reached one area of the circuit board. We replaced the button pad, cleaned the board with isopropyl alcohol, and fitted a new casing. The repair took about 30 minutes and the fob was fully functional again — all four buttons responding reliably. The customer had been ready to spend $320 on a replacement. Total repair cost was a fraction of that.
Sometimes the circuit board is too far gone. Corrosion, severe impact damage, or a failed chip means the fob cannot be reliably restored. In these cases, we supply a quality aftermarket replacement fob and program it to the vehicle on site. We will always give you both options — repair price and replacement price — so you can make an informed decision.
Actual jobs completed across Hamilton and the Waikato — no made-up scenarios.
Problem
Two buttons unresponsive; cracked casing from drop; moisture ingress
Solution
New button pad fitted, board cleaned, new casing installed
Avoided $320 replacement fob — repaired for fraction of the cost
Problem
Fob works only from 1 metre — battery new
Solution
Corroded transmitter contacts cleaned; transmitter output restored
Full remote range restored without buying a new fob
Real photos from our key fob repair jobs across Hamilton and the Waikato.
We travel to your vehicle anywhere in the region — no towing required.
Why us
We come to your vehicle anywhere in Hamilton and the wider Waikato, so there is no towing.
More than a decade of car key and lock work across the Waikato.
Keys cut and programmed at your car with Silca SmartPro, Autel, Xhorse and OBDSTAR equipment, the same class dealerships use.
Price ranges are on the site, and you get your price on the phone before we travel.
Rated 5.0 from 146 Google reviews by Hamilton and Waikato customers.
Every job we do is covered by insurance.
Common questions
Yes. When a fob is beyond repair we supply a replacement key fob and program it to your car on site. A replacement remote key is typically $120–$250, depending on the car, what it needs and part availability.
Repairing a remote is $49.90–$120, depending on what is wrong. Soldering broken buttons sits at the lower end, and a new rechargeable battery, as in many BMW keys, at the upper end. Circuit board cleaning is included. If the remote is beyond repair, a replacement remote supplied and programmed is $120–$250, depending on the car and the availability of that remote.
The rubber button pad on the affected buttons has worn or delaminated, losing contact with the circuit board. This is a repair job, not a replacement — usually quick and cost-effective.
Sometimes. If the fob was wet briefly and the contacts are lightly corroded, a thorough clean with isopropyl alcohol can restore function. Significant water damage or corrosion may have permanently affected the circuit board — we assess on site.
This suggests a weak battery or a weakened transmitter circuit. Start with a fresh battery. If range is still poor, the transmitter may need attention — call us.
Yes, if your existing blade, chip, and circuit board are intact. We carry cases for many popular vehicles. Fitting a new casing takes 20–30 minutes.
Yes. We repair fobs for all common New Zealand vehicle brands. Call with your make and model and we will confirm whether we can help before travelling.
Last updated
Need key fob repair today?
Call for a free quote — we are mobile across Hamilton and the Waikato.
Call or message us with your vehicle details. We give you a fixed price before we travel and arrive within 20–40 minutes across Hamilton.
Also available: Digital Door Locks, Residential Locksmith, Lock Installation. View all services.
Emergency callout — Fast Response
Mobile auto locksmith across Hamilton and the Waikato. One call gets the job done.
