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KeySync Locksmith & Programming
Mobile Service · Georgia

The Specialist for Problems Other Shops Can't Solve

Deep electrical troubleshooting, ECU/TCU programming & cloning, factory-style wiring harness repair, key programming, and Toyota hybrid battery diagnostics — we come to you, anywhere in Georgia.

Call Now — 470-540-3370 Request Appointment Get Price Estimate
Mobile service — we come to you
All makes & models
Advanced diagnostics
Serving Cherokee & Cobb counties
Available for Service
KeySync mobile service van
5.0★
Google Reviews
Mobile
We Come To You
10+
Cities Served
Same
Day Service
📞

Call or text us anytime

470-540-3370
KeySync mobile service van — Woodstock GA

Fully Equipped Mobile Unit

Professional Tools. Factory-Grade Equipment. Right at Your Door.

What We Do

Specialist Automotive Electrical & Programming Services

We're not a general repair shop — we specialize in the hard problems other shops can't diagnose: deep electrical faults, ECU/TCU programming, key systems, and Toyota hybrid batteries.

⚡

Deep Electrical Troubleshooting

Intermittent faults, wiring shorts, corroded connectors, module communication failures — we trace the problem to its actual source, not just the symptom.

Specialist
🔧

Wiring Harness & Connector Pin Repair

Factory-style wiring repairs using the Wezag LC6 crimping tool for true OEM-quality connector pin replacement — not splices or tape.

Wezag LC6
💻

ECU/TCU Programming, Coding & Cloning

Engine and transmission control unit programming, VIN coding, security adaptation, and cloning data from a failed unit to a replacement.

Advanced
🔋

Toyota Hybrid Battery Specialist

Module-level testing and repair for Prius, Camry Hybrid, Highlander Hybrid, and RAV4 Hybrid battery packs — often avoiding full replacement.

Toyota Hybrid
🔑

Key Programming & All-Keys-Lost

New keys programmed from scratch for virtually any vehicle, including transponder, smart proximity, and all-keys-lost situations.

Most Common
🛡️

Immobilizer Repair & Module Reset

Diagnose and repair immobilizer systems that block engine start, plus airbag/SRS module resets after an accident.

Diagnostic
Price Estimator

Get a VIN-Based Quote

Enter your VIN for a more accurate price estimate. Our tool decodes your vehicle's make, model, year, and security system to calculate a realistic range.

Why use VIN pricing?
Your VIN encodes the exact security tier, key type, and programming requirements — giving you a much more accurate estimate than a general quote.

🚗 Works for any year, make, and model
🔒 Identifies your exact security system
💡 Luxury vehicles (BMW, Mercedes) priced separately
📞 Final quote confirmed before work begins
Note: Estimates are approximate. Final pricing depends on key availability, programming difficulty, and site conditions. We'll always confirm before starting.
Coverage

Mobile Service Area

Based in Woodstock, GA — we serve the greater Cherokee and Cobb County region and beyond. Don't see your city? Call us, we may still be able to help.

Woodstock, GA
Marietta, GA
Canton, GA
Kennesaw, GA
Alpharetta, GA
Roswell, GA
Holly Springs, GA
Ball Ground, GA
Smyrna, GA
Acworth, GA

Not listed? Call 470-540-3370 — we're flexible and may still be able to serve you.

Book Your Appointment

Schedule & Pay $100 Deposit

3 easy steps — pick your time slot, fill in your details, then pay the $100 deposit to lock it in.

1Pick a Time
›
2Your Details
›
3Pay $100

Book your mobile service in 3 steps. Your $100 deposit is applied to your final bill and secures your time slot on our calendar.

📞
Call or Text
470-540-3370
✉️
Email
contact@keysync.net
📍
Service Area
Woodstock & surrounds

💡 About the deposit:
The $100 deposit secures your time slot and is fully applied to your final bill. Cancellations made 24+ hours in advance receive a full refund.

Step 1 — Pick Your Date & Time

Select an available day and time slot. We work Mon–Fri 8am–6pm and Saturday 8am–2pm. Closed Sunday.

What Customers Say

Real Results, Real People

Don't take our word for it — here's what customers across Cherokee and Cobb County say about KeySync.

5.0
★★★★★
47 reviews
5★
45
4★
2
3★
0
⭐ Leave a Review
★★★★★

"Lost all my keys to my 2020 Camry on a Friday afternoon. KeySync came to my house same day, had me driving again in under an hour. Dealer quoted me $850 and 2 weeks — KeySync charged half that and did it same day."

V
Vito Laselva
Woodstock, GA · Toyota Camry
✓ Verified Customer
★★★★★

"My Prius had the red triangle warning. Toyota dealer wanted $4,500 for a whole new battery pack. KeySync tested every module, replaced 3 bad ones, and I paid a fraction of that. Runs perfectly 8 months later."

H
Hugo Godoi
Marietta, GA · Toyota Prius
✓ Verified Customer
★★★★★

"Had an electrical gremlin that 3 different shops couldn't find for 6 months. KeySync traced it to a corroded connector pin in 45 minutes and fixed it properly with a factory crimp — not a splice. Night and day difference."

M
Marina Tassi
Canton, GA · Ford F-150
✓ Verified Customer
★★★★★

"Bought a used ECU on eBay — big mistake, car wouldn't start. KeySync cloned my original ECU data onto it and had it running the same afternoon. Saved me from buying another $600 unit. Absolute lifesaver."

D
Derek M.
Kennesaw, GA · Honda Accord
✓ Verified Customer
★★★★★

"Smart key fob for my BMW stopped working and the dealer wanted a crazy amount just to look at it. KeySync diagnosed it roadside, programmed a new key, and I was gone in 30 minutes. Professional, fast, and honest pricing."

A
Alicia F.
Alpharetta, GA · BMW 5 Series
✓ Verified Customer
★★★★★

"Airbag light on after a fender bender. Body shop said I needed a $400 module. KeySync reset the existing module for a fraction of the cost. Light has been off for 4 months. Highly recommend for anyone in the Roswell area."

R
Robert H.
Roswell, GA · Chevrolet Malibu
✓ Verified Customer
Transparent Pricing

Service Price Ranges

Honest estimates so you know what to expect. Final price confirmed before any work begins — no surprises.

Service Est. Time Starting From
Spare Key / Key Programming
Additional key when you have at least one working key
⏱ 30–45 min
$150
All Keys Lost — Key Programming
No working keys at all — requires full immobilizer procedure
⏱ 45–90 min
$250+
Immobilizer Diagnosis & Repair
Security light on, car won't start, key not recognized
⏱ 45–120 min
$175+
ECU / TCU Programming & Cloning
VIN coding, security adaptation, replacement unit programming
⏱ 60–120 min
$300+
Wiring Harness / Connector Pin Repair
Factory-style Wezag LC6 crimp repair, per connector
⏱ 60–180 min
$150+
Toyota Hybrid Battery Diagnostics
Module-level testing — includes repair estimate
⏱ 60–90 min
$150+
Airbag / SRS Module Reset
Post-accident module reset, restore to factory condition
⏱ 30–60 min
$120+
Deep Electrical Troubleshooting
Intermittent faults, no-code issues, circuit tracing
⏱ 60–120 min
$125/hr

Luxury vehicles (BMW, Mercedes, Audi, Land Rover) may be priced higher due to advanced security systems. Book a consultation or use our VIN estimator for a specific quote.

Real Talk

Common Problems We Solve Every Day

These are the exact situations our customers call us about. If any of these sound familiar, we can help — and we come to you.

Key Programming

"I Lost All My Car Keys — The Dealer Wants $800 and a 2-Week Wait"

This is one of the most stressful situations a driver faces. Your car is sitting in your driveway — perfectly fine — and you're completely locked out of your life. The dealer's timeline doesn't care about your job, your kids, or your schedule.

The reality is that all-keys-lost programming requires the right equipment and the right knowledge — not a dealership franchise. KeySync carries professional-grade key programming tools that work on virtually every make and model. We come to your location, program a new working key directly to your vehicle's immobilizer system, and you're driving again — usually the same day.

What we actually do: We connect to your vehicle's OBD port, read the immobilizer data, generate a new key with a matched transponder chip, and program it live. No towing, no waiting, no dealer markup.

Call for Same-Day Key Programming
Electrical Repair

"Three Shops Couldn't Find the Problem. My Car Still Has Random Electrical Gremlins."

Intermittent electrical faults are the nightmare of modern vehicles. The car throws a code, the shop clears it, a week later it's back. Or worse — it never throws a code at all but something is clearly wrong.

Most general repair shops are not equipped for deep electrical diagnosis. They scan codes, replace the part the code points to, and call it done. But faults caused by damaged wiring, corroded connector pins, or a failing module don't always leave an obvious trail.

What makes us different: We trace circuits, test signal integrity, and inspect connector pins physically. When we find damaged wiring, we don't just splice — we use the Wezag LC6 to install factory-style crimped connector pins, restoring the connection to OEM spec. No more band-aids.

Call for Electrical Diagnosis
Toyota Hybrid

"My Prius Has a Red Triangle Warning Light — The Dealer Quoted Me $4,000 for a New Hybrid Battery"

That red triangle of death on a Toyota hybrid sends most owners into a panic — and straight to a dealer quote that starts at $3,000–$5,000. But here's what most people don't know: in the majority of cases, the entire battery pack doesn't need to be replaced.

Toyota hybrid battery packs are made up of individual modules. When one or two modules fail, the whole pack triggers a fault. A specialist who can test at the module level can often repair or replace only the failing cells — bringing your battery back to full function at a fraction of dealer cost.

Our approach: We test every module individually, identify exactly what's failing, and give you an honest assessment. Prius, Camry Hybrid, Highlander Hybrid, RAV4 Hybrid — we work on all Toyota hybrid platforms.

Get a Hybrid Battery Assessment
ECU Programming

"I Bought a Used ECU Online to Save Money — Now My Car Won't Start at All"

It's a trap thousands of car owners fall into every year. A replacement ECU from eBay or a salvage yard looks like a $200 fix — until you install it and discover the car won't start, the immobilizer rejects it, and now you're worse off than before.

Every ECU is married to a specific vehicle through VIN coding and immobilizer pairing. A used unit from a different vehicle needs to be reprogrammed before your car will accept it. This requires professional dealer-level or better software — not a generic OBD scanner.

What we can do: We can clone your original ECU's data onto the replacement unit, or perform a full virgin programming sequence. We also handle TCU (transmission control unit) programming and adaptation resets after replacement.

Call for ECU Programming Help
FAQ

Frequently Asked Questions

Answers to the questions we hear most. If yours isn't here, just call us.