Car Key Programming
Car Key Programming Service in South Georgia
On-site transponder key programming, fob programming, smart key programming, and all-keys-lost service for all major vehicle brands. We come to you -- no towing, no dealer appointment, same-day service throughout South Georgia.
Key Programming Services We Provide
Every service is performed on-site at your vehicle. No towing, no dealer wait, no multi-day appointment.
Transponder Key Programming
Transponder keys contain a microchip that must be programmed to match your vehicle's immobilizer. Without programming, the correct blade cut will turn the ignition but the engine will not start. We program transponder keys on-site for all major domestic and import platforms using OBD-II diagnostic access.
Key Fob Programming
Remote entry fobs require programming to communicate with your vehicle's body control module. We program replacement fobs for door lock, trunk release, alarm, and remote start functions on all major brands. Fob programming is performed on-site at your vehicle in most cases in 15 to 30 minutes.
Push-to-Start Smart Key Programming
Proximity smart keys use encrypted rolling codes that require specialized programming equipment and OBD-II access. We carry the diagnostic hardware required to add or replace smart keys on push-to-start vehicles across Toyota, Honda, Ford, Chevrolet, Nissan, Hyundai, Kia, BMW, and most other major platforms.
All Keys Lost Programming
When every key is lost or destroyed, a standard key-learning procedure cannot be used. All-keys-lost situations require a full immobilizer programming sequence using OBD-II access and, on some high-security platforms, additional pin-code extraction steps. We handle this process on-site for most domestic and import brands.
Spare Key Programming
Adding a second or third programmed key to your vehicle is one of the most effective preventive services we offer. A spare key made today costs a fraction of an emergency all-keys-lost replacement. We add spare keys to your vehicle's programming on-site using the existing key as part of the process.
Immobilizer Diagnostics
If your key is not being recognized by your vehicle, the failure may be the chip, the antenna ring, the immobilizer module, or the key itself. We diagnose the source of the failure using OBD-II diagnostic tools and advise on the correct repair before any parts are replaced.
How Car Key Programming Works
All vehicles manufactured after 1996 (and most after 1993) include an immobilizer system. The immobilizer is a theft deterrent that prevents the engine from starting unless the ignition key contains a transponder chip with the correct encrypted code registered to that specific vehicle.
Programming a new key means establishing the communication handshake between the chip in the key and the immobilizer control module. This is done through a key-learning procedure using an existing programmed key, or -- when all keys are lost -- through OBD-II diagnostic port access using professional programming software that communicates directly with the immobilizer module.
The programming software writes the new key's chip code into the vehicle's allowed-key registry inside the immobilizer module. On most platforms this is a 15 to 30 minute process. On high-security platforms -- particularly late-model European vehicles -- the process involves additional security layers that take longer.
After programming, we test every function -- transponder recognition (engine start), remote door lock, trunk release, and panic if equipped -- before we leave. You personally test the key before we pack up. For more technical detail, see our transponder key guide and our OBD-II programming overview.
OBD-II Based Programming
Professional diagnostic equipment for all major platforms. Same tools used by dealer service departments.
On-Site at Your Vehicle
No tow required. We program keys at your vehicle's current location.
All-Keys-Lost Capable
We handle situations where no working key exists -- no dealer referral required on most platforms.
Transponder + Remote
Both the immobilizer chip and remote functions programmed in one visit.
Ownership Verified
Proof of ownership required before any key is programmed. This protects you and us.
Tested Before We Leave
Every key tested for engine start and remote function on-site before job is considered complete.
Types of Car Keys We Program
Different vehicle platforms use different key and immobilizer technologies. We carry programming equipment for all of the following types. For more detail, see our complete car key types guide.
Basic Transponder Keys (1996-2008 Typical)
Used on most vehicles made between 1996 and 2008. The key blade operates the mechanical lock cylinders and a chip in the key head communicates with the immobilizer to authorize engine start. These chips are typically fixed-code (not rolling encrypted) and are faster to program.
Examples: Ford H75 (PATS1/PATS2), Toyota G chip, Honda ID46, GM PK3/PK3+, Dodge ID46
High-Security Transponder Keys (2008-Present Typical)
Used on most vehicles made after 2008. The blade uses a more complex cut pattern (laser-cut or sidewinder) and the chip uses rolling encrypted communication with the immobilizer. These require OBD-II programming and take longer than basic transponder keys.
Examples: Ford Tibbe, BMW CAS3/CAS4, Audi/VW MQB platform, Toyota H chip (TPMS4 platform)
Remote Head Keys
A combined key blade and remote fob in a single unit. The transponder chip handles immobilizer communication and the remote circuitry handles door lock, trunk, and alarm functions. Both must be programmed -- the transponder for engine start and the remote for fob functions.
Examples: Standard on most 2005-2022 domestic vehicles including GM key fobs, Ford flip-head keys, Chrysler remote head keys
Proximity Smart Keys (Push-to-Start)
A fob with no traditional blade. The vehicle detects the fob's presence continuously and allows push-button starting. These use high-security rolling encrypted codes and require specialized programming equipment and OBD-II access. Battery replacement must preserve the fob programming.
Examples: Toyota Smart Key, Honda Smart Key, Nissan Intelligent Key, Ford Intelligent Access, GM Keyless Access
Flip Keys (Folding Keys)
A remote fob with a folding blade. Common on European vehicles (VW, Audi, BMW) and some domestic models (Jeep, Chrysler, Dodge). Both the blade transponder and the remote functions require programming as separate steps.
Examples: VW Rabbit/Golf/Jetta flip key, Audi flip key, Jeep flip key (2008-2018), Chrysler flip key
All-Keys-Lost Programming: What to Expect
When every key is lost, stolen, or destroyed, the programming process is different from adding a spare. Here is exactly what happens on-site when no working key exists. See also our guide to lost car keys.
VIN Lookup and Key Code Determination
The key code (the specific cut pattern for your vehicle's mechanical locks and ignition cylinder) is looked up from the VIN. For most vehicles, this is available through professional key code databases. We cut the blade to this specification so the mechanical key works in the door and ignition cylinders.
Immobilizer Mode Initiation
On vehicles where a working key is required to initiate programming, the loss of all keys means we must enter the immobilizer's emergency programming mode. This varies by platform -- some require OBD-II access, some require pin code extraction from the ECU, and some require a dealer-level token to authorize the process.
New Key Registration
The new key's transponder chip is registered to the vehicle's immobilizer allowed-key list. On some platforms, this also deletes any previously registered keys -- which is actually a security benefit, as it ensures that lost keys no longer work.
Testing and Verification
We test the key for both mechanical function (door lock, ignition cylinder turn) and electronic function (transponder recognized, engine starts) before considering the job complete. We test multiple start cycles to confirm the programming is stable.
Common Key Programming Failures and What They Mean
Programming problems have specific causes. Understanding the symptom pattern helps diagnose the actual issue before any parts are replaced.
Key turns but engine cranks without starting
Likely cause: Transponder chip not recognized by immobilizer. The mechanical blade is correct but the electronic communication is failing. May also indicate an antenna ring failure or immobilizer module issue.
What we do: Diagnostic required. We connect OBD-II equipment and read immobilizer fault codes to identify whether the issue is the key chip, antenna, or module before recommending a repair.
Key programmed elsewhere but car won't start
Likely cause: Incompatible chip type, incorrect programming sequence, or the key blank was the wrong platform. Not all key blanks work on all vehicles even if the cut pattern matches.
What we do: We re-verify the chip type against the vehicle platform and re-program using the correct sequence. In some cases the blank itself must be replaced with a compatible unit.
Remote works but engine won't start
Likely cause: The fob and transponder are separate circuits. The remote can be programmed correctly while the transponder chip is either unprogrammed or has lost its programming.
What we do: We reprogram the transponder function specifically. On push-to-start vehicles, a failed smart key authentication is diagnosed via OBD-II before any parts are replaced.
Fob worked, then stopped after battery replacement
Likely cause: Many fobs lose their remote programming when the battery is fully depleted or removed for too long. The transponder chip is usually unaffected, but the remote functions must be reprogrammed.
What we do: We reprogram the remote functions on-site. This is typically a 15 to 20 minute service.
Only one of two keys works after all-keys-lost programming
Likely cause: The second key was not registered during the programming session, or the programming was interrupted. On some platforms, all keys must be registered in a single session.
What we do: We complete the programming with both keys present in a single session. Attempting to add a second key after the session has closed may require restarting the programming process.
When DIY Key Programming Goes Wrong
Consumer programming tools and online tutorials fail in predictable ways. These are the four scenarios we see most often -- and what to do instead.
Aftermarket fob purchased online does not program
Why it failed: The fob chip type does not match the vehicle's immobilizer specification. Many online fobs are listed as 'compatible' but use a different chip configuration that the vehicle's programming mode does not accept. The vendor typically does not offer refunds on electronic parts.
What to do: Call us before buying a fob online. We can tell you whether the platform accepts aftermarket programming and, if so, which chip type to look for. If you have already purchased an incompatible fob, we can advise on compatible alternatives.
OBD-II reader attempted programming, now car won't start at all
Why it failed: Consumer OBD-II readers marketed as 'key programmers' often initiate a partial programming sequence that corrupts the immobilizer's key registry. The vehicle enters a locked state where no existing keys are recognized. This is significantly more difficult to recover from than a standard all-keys-lost situation.
What to do: Do not attempt any additional programming after this occurs. Call us immediately and describe exactly what was attempted. Recovery from an interrupted programming sequence requires professional diagnostic access and, on some platforms, ECU-level intervention.
Self-programming procedure from YouTube video did not work
Why it failed: On-board self-programming procedures (the sequence of turning the key or pressing buttons a specific number of times) were removed or changed on most modern vehicles after 2010 as a theft deterrent. Procedures posted online may be for older model years, for a different market (Canadian or European spec), or simply incorrect.
What to do: OBD-II programming is the correct method for virtually all vehicles made after 2010. We carry professional software for all major platforms. If a self-programming procedure has failed but not corrupted the system, standard OBD-II programming typically resolves the situation on the same visit.
Programming was done but only one of two keys works
Why it failed: On many platforms, all keys must be presented and programmed within a single session. If the session was closed after the first key was programmed, the second key cannot be added without reopening the programming sequence from scratch.
What to do: We re-initiate the programming sequence with both keys present from the start. Both keys are registered in a single session, verified, and tested before we leave.
Modern Platform Notes (2018-2025)
Programming requirements have changed significantly on recent model years. Key information for the most common current platforms.
2019-2025 Ford F-Series and Bronco
Ford's current-generation trucks and the Bronco use the PATS-E (Enhanced Passive Anti-Theft) system with advanced encrypted communication between the key and the PCM. Programming requires OBD-II access with Ford-compatible software. These platforms do not support on-board self-programming. All-keys-lost scenarios require a complete PCM communication sequence that takes 45 to 90 minutes on-site.
2018-2025 GM Trucks (Silverado, Sierra, Colorado)
Current-generation GM trucks use the SecureCode II transponder system. Programming requires two working keys to add a third using the on-board procedure, or OBD-II access for all-keys-lost. The Remote Keyless Entry (RKE) module is separate from the Body Control Module (BCM) on these platforms -- fob remote functions must be programmed to the RKE module while the transponder is programmed to the BCM.
2020-2025 Toyota and Lexus
Toyota's current smart key platforms use the G-chip 128-bit encryption system with rolling codes. Programming requires a Toyota-compatible OBDII tool and typically 30 to 45 minutes for smart key enrollment. Toyota's advanced systems on 2022+ models (specifically the new TPMS4+ platform) have additional security layers -- call us with your exact year and model to confirm process and timing.
2019-2025 Hyundai and Kia
After widely publicized theft issues with older Hyundai/Kia models, these manufacturers implemented significantly stronger immobilizer systems on 2022+ models. New smart key programming on these platforms requires OBD-II access and, on some configurations, a 30-minute coding wait period. The 2019-2021 platforms use standard ID6D chip programming compatible with our equipment.
2018-2025 BMW (FEM/BDC)
BMW's FEM (Front Electronics Module) and BDC (Body Domain Controller) platforms, used on F-series and G-series vehicles respectively, require BMW-specific programming equipment. Smart key enrollment on these platforms includes a cloud-based verification step on some configurations. We carry compatible BMW programming hardware for FEM and BDC platforms. Very recent models (2024-2025 G-series) may have additional layers -- we advise you on the specific process for your vehicle when you call.
Key Programming FAQ
What is transponder key programming?
Transponder programming links the microchip inside your key to your vehicle's immobilizer system. The immobilizer sends a signal to the chip; if the chip responds with the correct code, the engine is allowed to start. Without programming, a key with the correct blade cut will turn the ignition but the engine will not crank. This security system has been standard on virtually all vehicles since 1998.
Can any key be programmed to my car?
The key must be compatible with your vehicle's immobilizer system -- specifically the chip type. Using the wrong chip type will result in a key that physically turns in the ignition but cannot be programmed to allow the engine to start. We verify the correct key blank and chip type for your specific vehicle before cutting anything.
How long does key programming take?
Most key programming jobs are completed in 20 to 40 minutes on-site. Adding a spare key when an existing working key is present is typically 15 to 25 minutes. All-keys-lost situations take longer -- 45 to 90 minutes depending on the vehicle platform -- because the immobilizer process is more involved. We give you a time estimate when you call.
Do you need my car to be running to program a key?
No. Most programming is done via the OBD-II port with the vehicle off. The vehicle needs a battery with sufficient charge to power the OBD-II port and the immobilizer module -- typically at least 12 volts. If your battery is weak, we may need to use a jump pack during programming. For all-keys-lost situations on some platforms, a battery charger connected during programming is recommended.
My key turns in the ignition but the car won't start -- is this a programming issue?
Almost certainly, yes. If the blade cut is correct (the key turns smoothly) but the engine does not crank or attempt to start, the transponder chip is the most likely cause -- it is either unprogrammed, has lost its programming, or is physically damaged. We diagnose this on-site and resolve it without towing. In rare cases, the immobilizer antenna ring or module may be the actual failure point, which we also diagnose.
What is all-keys-lost programming and is it harder?
All-keys-lost programming is the process of programming a new key to a vehicle when no working key exists. It is more involved than adding a spare key because the vehicle's normal key-learning procedure (which uses the existing key to initiate programming) cannot be used. We access the immobilizer through the OBD-II port using professional programming software that communicates directly with the immobilizer module. On some high-security platforms, additional steps are required. It takes longer but is a fully mobile, on-site service in most cases.
Can you program a key fob I purchased online?
Possibly, depending on the vehicle. Some platforms accept aftermarket fobs programmed via OBD-II or using on-board programming procedures. Others require an OEM fob with the exact chip configuration. Before buying a fob online, call us with your year, make, and model -- we can tell you whether an aftermarket fob will work or whether you need an OEM unit. Buying an incompatible fob online and having it fail to program is a common and avoidable expense.
My push-to-start fob has a fresh battery but the car won't recognize it. What happened?
When a smart fob's battery fully depletes or is removed, many platforms reset the fob's internal programming. A fresh battery restores power but the fob still needs to be re-registered to the vehicle. We reprogram smart fobs and proximity key fobs on-site. On some vehicles, the fob can be held against the start button to allow a single start while the fob is being reprogrammed -- call us and we will walk you through what to try first.
Does key programming delete my other keys?
It depends on the programming mode and the vehicle platform. When adding a spare key to a vehicle with an existing working key, most platforms add the new key to the allowed list without deleting existing keys. When performing all-keys-lost programming on some platforms, the immobilizer performs a complete reset -- all previously registered keys are cleared and only the new keys programmed in that session will work. This is actually a security feature when performed after a key is lost. We advise you on what to expect for your specific vehicle before we begin.
Can a dealership tell if a third-party locksmith programmed my key?
No. Key programming writes data to the vehicle's immobilizer module. Whether that programming was performed by a dealer tool or a professional locksmith's OBD-II equipment, the result in the vehicle's module is the same -- a registered key transponder code. There is no flag or record in the vehicle that identifies who performed the programming.
My car only has one key. Why should I get a spare programmed now?
When the single key is lost, the cost of all-keys-lost programming is significantly higher than the cost of adding a spare when one key exists. The spare key programming process is faster and simpler when a working key is present. One spare key prevents the most common automotive key emergency entirely -- the situation where you have no access to your own vehicle.
Can you program keys for high-security European vehicles like BMW and Audi?
We carry programming capability for BMW and Audi platforms. BMW uses the CAS (Car Access System) module across most modern models, and Audi/VW uses the Immo IV and MQB platforms. These are high-security systems that require more advanced equipment than domestic platforms. We advise you on the specific process for your vehicle when you call. Note that some very recent BMW or Audi models with the latest BISS security may require dealer-side pin codes -- we will tell you honestly if that applies to your vehicle.
What happens if key programming fails?
Programming failures are uncommon with professional equipment, but they can occur. The most common cause is an incompatible key blank, a weak vehicle battery during the programming sequence, or an existing fault in the vehicle's immobilizer module. If programming fails, we do not charge for a failed attempt -- we diagnose the cause and advise on the correct path forward. In some cases, an immobilizer module fault is the actual underlying issue, which is beyond the scope of key programming alone.
Do you program keys for trucks and commercial vehicles?
Yes. We program keys for light-duty and mid-duty commercial trucks including the Ford F-Series, RAM 1500/2500/3500, Chevrolet Silverado, GMC Sierra, Toyota Tundra, and most other common commercial platforms. For fleet vehicles, we offer on-site programming at your facility and can service multiple vehicles in a single visit. See our commercial locksmith page for fleet account options.
What areas do you cover for key programming service?
We provide on-site key programming throughout all of South Georgia. In the Savannah metro area -- Savannah, Pooler, Garden City, Port Wentworth, Georgetown, Wilmington Island, Tybee Island, and Richmond Hill -- our typical response is same-day and within hours. We also serve Hinesville, Statesboro, Brunswick, Waycross, Valdosta, Albany, Tifton, Douglas, and all surrounding communities. See our areas page for the full service coverage list.
Where We Program Keys
We program transponder keys and smart key fobs on-site throughout the Savannah metro area -- Pooler, Garden City, Port Wentworth, Georgetown, Wilmington Island, Tybee Island, and Richmond Hill -- and across all of South Georgia.
Need a Key Programmed?
Call us with your vehicle year, make, and model to confirm compatibility. We dispatch same-day throughout South Georgia. Available 24/7 for emergency key programming.
(912) 348-4006