Keyless Entry RKE Module Repair Mail-In Guide (2026)

Who this is for

This guide is for the owner, independent shop or mobile locksmith staring at a keyless entry system that has quit, and trying to figure out whether the problem is the key fob or the module that listens for it. The distinction matters, because the fix and the cost are very different. A fob problem is a battery, a button or a transmitter. A module problem is the receiver inside the car, and replacing that module new from a dealer means buying the part and paying to program it.

Auto Module Lab repairs the receiver module itself at the board level. If the module is the failure, repairing it is far cheaper than a new programmed part, and it keeps your original module, which is already married to your car. We are based in Arlington, Texas and work nationwide by mail for customers in Dallas, Houston, Austin, San Antonio, Miami and everywhere in between, so there is no need for a local specialist.

This service covers all makes and models, because keyless receiver modules share the same failure physics regardless of the badge on the hood.

What the keyless entry module actually is

Different manufacturers use different names for the same idea. You will see RKE, for remote keyless entry, RFA, for radio frequency hub or remote function actuator, keyless module, RF hub, or simply the receiver. Whatever the name, this is the module inside the vehicle that receives the radio signal from your remote, validates it, and tells the body to lock, unlock, open the trunk or start the engine.

It is a circuit board with a radio receiver, a microcontroller and the connections to the vehicle network. It listens on a license-free radio band, typically the 315 MHz band in North America that the FCC regulates for unlicensed devices under Part 15, and it has to stay awake enough to hear a remote without draining the battery. When the board fails, the symptoms look like a key problem from the driver's seat, but the cause is inside the car.

That 315 MHz link is not arbitrary. Under 47 CFR Part 15, Section 15.231, the periodic-operation rule that covers garage-door openers and keyless-entry remotes, the transmitter in your fob is a low-power intentional radiator allowed to send only a short control signal, which is exactly why range is modest and why a weakening receiver front end shows up as shrinking range long before the remote dies. The FCC's Part 15 compliance guidance treats the fob and the in-car receiver as a matched, certified radio pair, so when the pairing stops working, the failure is just as likely to be on the receiver side as in your hand. And the receiver is rarely a simple part: a modern car carries anywhere from 1,000 to 3,000 semiconductor chips, per Polar Semiconductor, and the keyless receiver is one of the small boards quietly running among them.

Common module names by manufacturer

Manufacturer	Common module name	Role
Chrysler / Dodge / Jeep / Ram	RFA / WIN / RF hub	Receives remote, handles passive entry
Ford / Lincoln	RFA / SJB receiver section	Receives remote, body control link
GM	RCDLR / keyless receiver	Receives remote signal
Honda / Acura	Keyless control unit	Receives remote, immobilizer link
Toyota / Lexus	Certification ECU / wireless door lock receiver	Receives remote, smart-key
VW / Audi	Comfort / Kessy receiver	Receives remote, passive entry

The names vary, but the job and the failure modes are the same, which is why a board-level bench repair applies across brands.

Symptoms of a failed receiver module, not a fob

The hardest part of a keyless fault is telling the module apart from the remote. These patterns point at the module rather than the key:

• All remotes fail at once. If you have two or three remotes and every one of them stops working on the same day, the common element is the receiver, not three fobs failing simultaneously.
• Intermittent lock and unlock. The remote works sometimes and not others, or the doors lock and unlock on their own, which is a receiver behaving erratically rather than a dead fob.
• A module that will not sleep and drains the battery. A receiver that stays awake instead of going to low-power sleep keeps drawing current, and the car shows up with a flat battery every morning. A parasitic drain that traces to the keyless module is a classic board failure.
• Short remote range that keeps shrinking. Range that drops from across the lot to right at the door, on every remote, points at a weakening receiver front end.
• Passive entry quits but the key still starts the car. Touch-to-unlock stops working while the physical key or push-button start still functions, isolating the fault to the receiver section.
• Communication faults for the module on a scan. A scan tool reports the keyless or RF module as not communicating or throwing internal faults.

When the pattern is several remotes failing together, self-actuating locks, or a battery drain, the receiver module is the suspect.

Fob problem versus module problem, told honestly

We will not take a repair order for a module when the real problem is a fob, because that wastes your money and your time. Here is the honest split:

It is probably the fob, not the module, when:

• Only one of several remotes fails while the others work. That is a single dead or weak remote.
• A fresh coin-cell battery in the remote restores function. That was a battery, not the module.
• The remote is physically cracked, water-damaged or has a stuck button. That is transmitter damage.
• The car works perfectly with the spare remote. The receiver is fine; the first remote is the issue.

It is probably the module, not the fob, when:

• Every remote fails together, as described above.
• Locks actuate on their own or behave erratically.
• The car has an unexplained battery drain that traces to the keyless module.
• Range collapses on all remotes at once.

If you are not certain, start with a fresh battery and try a known-good spare remote. If those do not fix it, the module is the likely failure, and that is what we repair. This is also why we offer a bench evaluation for ambiguous cases, covered below.

How board-level repair works, in plain terms

A board-level repair means we fix the actual circuit board rather than swapping the whole module for a new programmed part. On the bench, the module is opened, powered and tested to reproduce the fault, then the failed components are identified and replaced. The repaired board is then tested again to confirm the symptom is gone before it ships back.

Because the repaired module is your original, it stays married to your car. Its identity, its coding and its link to the immobilizer are unchanged, so when it goes back in, the vehicle recognizes it without dealer programming. That is the core advantage over a new module: a new part has to be programmed to the car, while your repaired original already belongs to it.

The mail-in process, step by step

The job is built around mailing one module to the bench and getting the same repaired module back.

1. Pay and start your order. Begin on the keyless entry module repair service page. The repair is roughly 175 dollars.
2. Ship the module to the bench. Remove the receiver module and mail it to Auto Module Lab, 1168 W Pioneer Parkway, Arlington TX 76013. Pack it protected against static and impact, and include your order details.
3. 24-hour bench turnaround. Once the module arrives, we reproduce the fault, repair the board at the component level, and test the repair, with a 24-hour bench turnaround.
4. Flat-rate return shipping. We ship your repaired original module back via the return tier you chose at checkout (from 14.95 dollars). It reinstalls and works, with no dealer programming needed because it is the same module that came out of your car.

That is the loop: pay, ship the module, we repair and test in 24 hours, you get your own module back working.

What to ship

Sending the right item keeps the repair to a single pass. Include:

• The receiver module itself. Send the keyless, RKE, RFA or RF hub module, not the key fob and not the whole dash harness. If you are unsure which box is the receiver, send a photo and we will identify it before you remove anything.
• Your order details. The order number plus the vehicle year, make and model help us confirm the module and the expected behavior.
• A note of the symptom. Telling us exactly what the car does, all remotes dead, locks cycling on their own, overnight battery drain, helps us reproduce and verify the fault quickly.

You do not need to send your keys or the body controller for a receiver repair. If your case is ambiguous and you are not sure the module is even the problem, contact us first or use the bench evaluation rather than guessing.

What this service does NOT do, stated honestly

• It does not fix a key fob. If the failure is a dead remote battery, a cracked transmitter or a stuck button, that is a fob, and repairing the module will not help. Replace or repair the remote instead.
• It does not cut or program keys. This is a receiver-module repair. Cutting a new key blade or programming a transmitter to the car is separate key work.
• It cannot repair a module that is physically destroyed. A board that is shattered, deeply corroded by flood water, or burned beyond recognition may be past repair. We will tell you if that is the case.
• It does not cure faults elsewhere in the car. If the real problem is wiring, a fuse, the body controller or a different module entirely, repairing the receiver will not fix it. That is what the bench evaluation is for.
• It is not an immobilizer bypass. Repairing the receiver restores normal keyless function. It does not defeat or remove the vehicle's security.

If your situation is one of these, we would rather redirect you than take a repair order that will not solve the problem.

Price versus the dealer

A dealer fix for a failed keyless receiver is a new module plus the labor to program it to the car, and on modern passive-entry systems that programming is not trivial. Vehicle repair costs overall have climbed steadily; the U.S. Bureau of Labor Statistics tracks motor vehicle maintenance and repair in the Consumer Price Index, and electronics-heavy repairs sit near the top of that range.

Path	Typical cost	Turnaround	Notes
Auto Module Lab repair (mail-in)	~175 dollars	24-hour bench + shipping	Keeps your original module, no programming
Dealer new module + programming	600-1,200+ dollars	Multiple days, appointment	New part plus programming labor
Used module, no programming	80-300 dollars part only	Often will not function	May need programming and may not match
Locksmith on-site	Varies, scheduling dependent	Same day if available	Cost depends heavily on platform

A used module looks cheap but frequently needs programming and may not match your car, while a repaired original needs neither. Repairing the board keeps the module the car already trusts, which is both cheaper and cleaner than introducing a new part.

Frequently asked questions

How do I know it is the module and not my remote?

Start with a fresh coin-cell battery and a known-good spare remote. If a single remote works and another does not, it is the fob. If every remote fails together, if the locks cycle on their own, or if the car has an overnight battery drain, it is almost certainly the receiver module, which is what we repair.

Will my repaired module need dealer programming?

No. Because we repair and return your original module, its coding and link to the car are unchanged. It reinstalls and works without dealer programming, which is the main reason a repair beats a new part.

Do you really cover all makes and models?

Yes. Keyless receiver modules share the same failure physics across brands, so the board-level repair approach applies whether the car is domestic, European or Asian. If your module is unusual, send a photo first and we will confirm.

What if my module turns out to be unrepairable?

If a board is destroyed by flood, fire or shattering, it may be beyond repair, and we will tell you honestly rather than charge for work we cannot complete. For ambiguous or unusual cases, the bench evaluation is the right starting point.

Can you also fix a module that drains my battery?

Yes. A receiver that will not sleep and keeps the car awake is a common board failure that shows up as an overnight battery drain. Reproducing that drain and correcting the sleep behavior is part of the bench repair.

How long does it take?

Bench turnaround is 24 hours once the module arrives. The rest is shipping time each way, which varies with the carrier and your location.

Is this an immobilizer or security bypass?

No. This restores normal keyless entry function on your own car. It does not defeat the immobilizer or remove vehicle security.

What the bench sees

The tell is almost always "all my remotes stopped at once." Two or three fobs do not die on the same Tuesday. When that is the complaint, I am looking at the receiver board, usually a tired front-end or a chip that will not let the module sleep, and that is a solder-level fix, not a new programmed part. Keeping the customer's own receiver means the car never has to be re-married to anything. — Master automotive locksmith and module bench technician, 15+ years experience (anonymized)

A repaired original also sidesteps the programming problem that makes a new part expensive. Because the receiver is a certified radio device under FCC Part 15, a replacement has to be coded to the car before it will talk to your existing fobs, while your repaired original is already coded and already trusted.

The bottom line

When all your remotes quit at once, the doors start locking on their own, or a module keeps the car awake and flattens the battery, the receiver, not the remote, is usually the failure. A board-level repair fixes the actual module and keeps your original, so it reinstalls without dealer programming. The repair is roughly 175 dollars, the bench turnaround is 24 hours, and return shipping is a flat-rate tier chosen at checkout (from 14.95 dollars).

Start at the keyless entry module repair service page, browse the full services list, see how the mail-in process works, or read about founder Adrian Torres and the bench experience behind every repair. If you are not certain the module is the problem, tell us the symptom first; we would rather diagnose than sell you the wrong fix.