Luxury Key Fob Replacement Cost in Frisco, TX (2026): BMW, Mercedes, Audi, Lexus and More

Luxury Key Fob Replacement Cost in Frisco: The Short Answer

As of October 2026, replacing a luxury proximity key fob in Frisco costs $120 to $500 with us when at least one working key still exists. Losing every key pushes the job to the top of that band, and some platforms add $200 to $800 of module work. A small set of the newest systems are dealer-only, and we say so on the phone before anyone drives out.

That is the headline. The rest of this guide explains why two fobs that look almost identical can sit at opposite ends of the range, how the fob families on the luxury cars we see most in Frisco actually differ, and what you can do before the call to keep your number in the lower half.

Frisco Car Key is a fully mobile automotive locksmith. We come to the car anywhere in Frisco, Plano, McKinney, Allen, The Colony and Prosper. Reach us at Frisco Car Key, (469) 402-9781, contact@friscocarkeys.com.

Why the Badge Is Not What Sets the Price

People expect a BMW fob to cost more than a Lexus fob because the car cost more. That is not how it works. The price of a replacement fob is set by three things that have little to do with the logo.

The security generation behind the fob. Every modern luxury fob is a radio transmitter plus a transponder or encrypted identity that the car's immobilizer has to accept. Older generations can be read and written with the professional tools an independent locksmith carries. Newer generations keep more of the process inside the manufacturer's own systems. Where a car falls on that line matters more than anything else on the invoice.

Whether a working key is present. Adding a key to a car that already trusts one is a defined procedure. Starting from zero keys means the car has to be convinced to trust a new key with no existing credential to vouch for it. On several luxury platforms that involves reading a module, and that is where the module band comes in.

The hardware itself. Some fobs are commodity-priced. Others carry displays, remote parking buttons, or comfort-access antennas, and the part cost reflects that.

So the useful question is not "what does a Mercedes fob cost" but "which Mercedes key system is this, and do you still have one key that works."

Luxury Key Fob Replacement Cost by Fob Family (Frisco, October 2026)

These are our price bands for the luxury fob families we handle most often in the Frisco area. Every row assumes a mobile visit to the vehicle. We confirm the exact figure against your VIN before dispatch.

Fob family	One working key (add a fob)	All keys lost	What decides the number
BMW comfort access / smart key (CAS, FEM, BDC eras)	$120 - $500	$120 - $500 plus $200 - $800 if a module must be read	Security module generation; display key hardware
Mercedes-Benz smart key (FBS3 era)	$120 - $500	$120 - $500 plus $200 - $800 module work	Reading the ignition or steering lock module
Mercedes-Benz smart key (FBS4 era)	Dealer order by VIN on most cars	Dealer order by VIN on most cars	Key is built by Mercedes for that VIN
Audi Advanced Key (Kessy)	$120 - $500	Upper end; some newer platforms dealer-only	Platform age and component protection
Porsche car-shaped key	$120 - $500 on supported years	Quote after VIN; newest platforms dealer-only	Model generation
Lexus smart key and card key	$120 - $500	Upper end of $120 - $500	Key type; card keys on certain models
Genesis smart key	$120 - $500	Upper end of $120 - $500	Remote parking key hardware on larger models
Range Rover / Land Rover smart key	$120 - $500 on supported years	Quote after VIN	Model year and platform
Cadillac / Lincoln / Grand Wagoneer smart key	$120 - $500	Upper end of $120 - $500	Fob hardware; remote start buttons
Emergency blade only (fob intact)	$50 - $300	Not applicable	Blade profile and cutting

The ranges overlap on purpose. A two-year-old Lexus with a working key and a fifteen-year-old BMW with a working key can land in the same place. What moves a job up the column is the all-keys-lost scenario and the security generation, not the price of the car.

Fob Family by Fob Family

BMW: three security eras under one badge

BMW has gone through several generations of key security in the last twenty years. Earlier cars keep the key data in a car access system module. Later cars move it into front and body electronics modules. On the eras our tools support, adding a key with one working key present is a routine smart key job. With no working key, the module that holds the key data often has to be read, which is where the module band applies.

The BMW Display Key, the larger fob with a screen offered on certain 7 Series, X5, X7 and related models, is a heavier part with more hardware cost. Many owners choose a standard comfort access key as the spare instead, which works for locking, unlocking and starting. If you are not sure which fob your car came with, a photo of the existing one tells us.

The newest BMW digital key platforms, including the phone-based Digital Key Plus on supported models, are a different conversation. The phone key is set up by the owner through the BMW app and the car. A locksmith supplies the physical key the system rests on. Our BMW Digital Key Plus guide covers that layer in detail.

Mercedes-Benz: the FBS3 and FBS4 line

Mercedes keys are the clearest example of security generation deciding the price. On the older FBS3-era cars, an independent locksmith with the right equipment can read the electronic ignition or steering lock module and produce a working key. That is real work, and with no keys present it uses the module band, but it is done at the car.

On the later FBS4 system, which covers most Mercedes models built in roughly the last decade, the key is generally produced by Mercedes for that specific VIN. We will not pretend otherwise. When a Frisco Mercedes owner calls with an FBS4 car, we tell them it is a dealer order and explain what we can still do: a non-destructive lockout, an emergency blade cut, or diagnosis when the key exists but the car will not accept it.

Audi: Advanced Key and the platform question

Audi's Advanced Key, sometimes called Kessy, is a proximity system across most of the range. Older platforms are well supported by independent tools, and adding a key with one present is routine. Newer platforms bring component protection and online authorization into the picture, and some all-keys-lost jobs on the newest Audis route to the dealer. Our Audi SQ5, S5 and RS key replacement post goes through the performance models in detail, because those are the ones Frisco owners ask about most.

Porsche: supported years versus the newest generation

The Porsche car-shaped key is one of the more expensive pieces of hardware in this list. On supported model years, adding a key with a working key present sits in the smart key band. On the newest generations, and on most all-keys-lost Porsche jobs, we quote after the VIN because the answer may be a dealer order. If you are buying a used Porsche with one key, that is the moment to add a second, while the car still trusts a key.

Lexus: smart key and card key

Lexus proximity keys are among the most predictable jobs on this list. A spare with one working key is a standard smart key procedure, and all keys lost stays inside the smart key band rather than jumping into module work on most models. Certain Lexus models were offered with a thin card-type smart key in addition to the regular fob. It works the same way for the car. It is just easier to carry in a wallet.

Genesis: standard smart key and the remote parking key

Genesis smart keys sit comfortably inside the smart key band. The larger key on GV80 and G90 models that includes remote parking functions is more hardware and costs more as a part. For the immobilizer side of the larger Genesis models, our Genesis GV80 and G90 module programming post explains when module work is involved.

Range Rover and Land Rover

Supported model years are routine smart key work with one key present. The newest Range Rover platforms are quoted after the VIN, because the key process on some of them sits with the dealer. Our Range Rover key fob replacement guide covers the model years in more depth.

Cadillac, Lincoln and the Grand Wagoneer

The large American luxury SUVs that fill Frisco school pickup lines are mostly straightforward smart key jobs. The fobs carry remote start and power liftgate buttons, so the part matters, but the procedure is well supported. If the fob is fine and the vehicle has stopped accepting it, that is often a module question rather than a fob question. Our Jeep Wagoneer and Grand Wagoneer module programming post covers exactly that case.

"The fob that costs the most is almost never the one with the fanciest badge. It is the one where the customer waited until the last key was gone. A spare made while one key still works is a different, smaller job on nearly every luxury car we touch." - a Frisco Car Key technician who handles our European and luxury smart key calls

What Changes the Price Inside the Band

Even within one fob family, a few factors decide whether your job sits at the bottom or the top of the range.

Number of keys in hand. One working key is the single biggest money-saver. Two working keys are better still, because on several systems the procedure registers every key at once and anything not present stops working.

Where the car is. A car in a Frisco driveway or office garage is the easiest visit. A car in a tight parking structure at The Star or Stonebriar Centre is still workable, but it can add time.

Time of day. After-hours calls cost more than a weekday daytime visit. If your situation is a spare rather than an emergency, scheduling it during the day saves money.

Fob sourcing. Some luxury fobs are stocked. Others must be ordered for your exact part number. We tell you which before the visit, so there is no surprise wait.

Whether the fob is really the problem. A surprising number of "I need a new fob" calls turn out to be a weak fob battery, a low 12-volt battery, or a car that has stopped accepting both keys at once. If both key fobs stopped working at the same time, the fobs are rarely the cause, and buying a new one will not fix it.

Key Fob Replacement Near Me: What a Mobile Visit Looks Like

When people search for key fob replacement near them, they are usually picturing a counter to walk up to. A mobile locksmith works the other way around. We come to the car, which matters because a car with no working key cannot be driven to anyone.

The call. We ask for the year, make, model and VIN, how many working keys you have, and where the car is. The VIN is on the driver-side lower windshield and on the registration.
The quote. We confirm the fob family, whether we support it, and a price before anyone is dispatched. If the honest answer is "dealer order," you hear that on this call.
Ownership check. Before any key is made, we verify that you own the vehicle or are authorized to have a key made for it. A photo ID matching the registration or title is the usual standard.
The work. The new fob is cut where it has an emergency blade, programmed to the car, and tested for locking, unlocking, starting and any remote functions.
The handover. You test every button and every key before we leave.

For the wider picture of car key replacement in Frisco, including bladed transponder keys and flip keys rather than luxury fobs alone, our Frisco page and our car key replacement service page cover the full range.

Dealer, Locksmith or Online Fob?

There are three ways to get a replacement luxury fob, and each has a place.

The dealer. For FBS4 Mercedes, the newest Porsche and Audi platforms, and certain recent Range Rovers, the dealer is the right answer and sometimes the only one. Expect to arrange a visit and to wait for a VIN-specific key.

A mobile locksmith. For the large majority of luxury fob jobs on supported platforms, a mobile locksmith does the same procedure at your car. The advantage is that the car does not need to move, which matters most when you have no working key at all.

An online fob. Fobs sold online are sometimes the right part and sometimes not. Many luxury fobs cannot be reused once they have been programmed to another car, and part numbers that look identical can be different internally. If you already bought one, send us a photo of the back of the fob and the circuit board before the visit. We will tell you honestly whether it is likely to work, and we do not charge you to find out it is the wrong part.

How to Keep Your Number Low

Make the spare before you need it. If you are down to one luxury fob, adding a second now is the cheapest this job will ever be.
Find the second key. Check drawers, other cars and old bags before calling. On several systems, every key you want to keep must be present at the appointment.
Replace fob batteries on a schedule. A coin cell costs a few dollars and fails faster in a Texas summer. Our Texas heat key fob failures post covers why.
Have the VIN ready. It turns a twenty-minute phone call into a five-minute one and gets you a firmer quote.
Book daytime when it is not an emergency. A planned spare does not need an after-hours rate.

If you are shopping a used luxury car in Frisco and it comes with one key, put the cost of a second fob into your offer. On some platforms it is a routine add-on. On others it is the most expensive surprise in the first month of ownership. Our post on buying a used exotic with one key walks through that negotiation.

A Note on Fob Repairs Versus Replacement

Not every failing luxury fob needs to be replaced. A cracked housing with healthy electronics inside, a worn button membrane, or a loose battery contact can sometimes be dealt with by moving the original board into a new shell, which keeps the identity the car already trusts. Whether that is sensible depends on the fob. Some luxury fobs are sealed units that do not open without damage, and some carry their antenna in the housing itself. We look at the fob before recommending anything, and if a new battery is all it needs, we say so.

The one case where a repair is never the answer is a fob that has been lost or stolen. A lost key that still works is a security risk, not just an inconvenience, because whoever finds it can still open and start the car. In that situation the right job is a new key plus removing the lost one from the car's memory, which is something we handle as part of the same visit on supported platforms.

Frequently Asked Questions

How much does a luxury key fob replacement cost in Frisco?

As of October 2026, replacing a luxury proximity fob with at least one working key costs $120 to $500 with us. All keys lost sits at the top of that band, and some platforms add $200 to $800 for module work. A few of the newest systems are dealer-only, and we tell you that before dispatch.

Why does a new key fob cost more when I have lost every key?

With one working key, the car already trusts a credential and adding another is a defined procedure. With no keys, the car has to be convinced to trust a brand new key with nothing to vouch for it, which on several luxury platforms means reading or programming a module. That extra step is what moves the price.

Can a locksmith replace a Mercedes key fob?

On older FBS3-era Mercedes models, yes, by reading the ignition or steering lock module at the car. On the later FBS4 system that covers most recent models, the key is generally produced by Mercedes for that VIN, so it is a dealer order. We confirm which system your car has from the VIN.

Is it cheaper to buy a luxury key fob online?

Sometimes, but it is a gamble. Many luxury fobs cannot be reprogrammed once they have been used on another car, and identical-looking parts can differ inside. Send us a photo of the back and the circuit board before the visit and we will tell you whether it is likely to work.

Do I need to bring all my keys to the appointment?

On several luxury systems the procedure registers every key at once, and any key not present can stop working afterward. If you have more than one key, bring them all. It also tells us the car already trusts a key, which usually keeps the job in the lower half of the band.

Do you come to me for a key fob replacement near me in Frisco?

Yes. We are fully mobile and work at the car in Frisco, Plano, McKinney, Allen, The Colony and Prosper. A car with no working key cannot be driven anywhere, so coming to it is the whole point.

What do I need to prove I own the car?

A photo ID that matches the registration or title is the usual standard. We verify ownership before any key is made, which is the same check that stops a stranger from having a key made to your car.

References

National Highway Traffic Safety Administration (NHTSA) - keyless ignition safety and recall lookup by VIN: https://www.nhtsa.gov/recalls
National Automotive Service Task Force (NASTF) - vehicle security professional registry and secure key data access: https://www.nastf.org
Associated Locksmiths of America (ALOA) - consumer guidance on choosing an automotive locksmith: https://www.aloa.org
Insurance Institute for Highway Safety (IIHS) - vehicle theft and immobilizer research: https://www.iihs.org
Federal Trade Commission (FTC) - consumer guidance on clear pricing and service quotes: https://www.ftc.gov
AAA - key fob battery and roadside assistance guidance: https://www.aaa.com
Texas Department of Public Safety, Private Security Program - locksmith licensing in Texas: https://www.dps.texas.gov

Down to one luxury fob, or none? Call Frisco Car Key at (469) 402-9781 or email contact@friscocarkeys.com with your VIN and how many keys you have. We will tell you whether your fob family is a mobile job or a dealer order, and give you the price before anyone drives out. See our smart key programming service for Frisco, Plano and Prosper.