Transponder Chips – Programming Solutions for Automotive Locksmiths

KeylessCity offers OEM-compatible and aftermarket transponder chips designed for locksmiths, dealerships, and auto shops who demand precision and security. Our chips provide the perfect solution for key programming, replacements, and emergency services—ensuring seamless vehicle integration every time.

If you’re new to the game or even knee-deep in it, transponder chips can feel like alphabet soup: ID46, 4D, 4A, 48, MQB... it’s enough to make you wanna throw your key programmer out the van. But don’t. Once you know how these chips work, and why super chips might just be your best friend, it all clicks into place.

What Are Transponder Chips?

Every modern car key, even the old-school ones. has some kind of transponder chip inside. That’s the little guy talking to the car’s immobilizer. If that chip’s not programmed right, the car’s not starting.

You're not just cutting keys, you're cloning brains.

Why You Need Transponder Chips in Your Arsenal

• Key replacements: Lost key? Customer’s stranded? You need the right chip to bring their ride back to life.
• Cloning jobs: Got a working key? Clone the chip and go. Fastest money you’ll ever make.
• All-key-lost situations: No working key? You're generating and programming fresh.
• Fleet/commercial work: Multiple vehicles, bulk keys, fast turnaround, low margin jobs. Chips make it possible.
  
  

OEM vs Aftermarket vs Super Chips

1. OEM Chips

• Pros: Factory-perfect, no surprises.
• Cons: Expensive. Slower to get. Limited supply.
• Best for: High-end jobs where quality trumps price.
  
  

2. Aftermarket Chips

• Pros: Affordable, decent compatibility.
• Cons: Can be hit-or-miss. Quality varies.
• Best for: Budget jobs, quick turnarounds.
  
  

3. Super Chips (Like Xhorse XT27A)

• Pros:
  • One chip does the job of many: ID46, 4D, 48, ... the list goes on.
  • Cuts your inventory in half.
  • Saves you money, space, and stress.
    
    
• Cons:
  • Doesn’t work on every vehicle. MQB? Forget it.
  • Clone failures can happen, especially on newer systems.
  • Best for mobile locksmiths, new shops, and anyone trying to stay lean and fast.
    
    

Clone or Generate? Know the Difference

These aren’t the same thing, and using the wrong method can cost you time, money, and sometimes even a pissed-off customer standing next to a dead car.

Cloning is exactly what it sounds like: you’re making a copy of a working key. You’re not adding a new key to the car’s memory, you’re just duplicating the transponder data from the working key and writing it onto a blank chip.

It’s fast. Usually takes a few minutes. You don’t even need to connect to the car. Just read the original key, pop in a blank chip (usually a super chip or dedicated cloneable one), and write the data. Done.

Cloning is perfect when the customer still has a working key, and the car allows cloning (not all do — we’ll get into that). No PIN codes, no ECU access, no risk of locking modules. It’s low-risk, high-reward.

What About “Generating” a Key?

When you generate a key, you’re telling the car: “Hey, here’s a brand-new key. Accept it.” That means accessing the car’s immobilizer system, either through OBD, EEPROM, or other methods, and programming the key directly into the system. You're not copying anything, you're adding a legit key the car will recognize on its own.

You’ll use this method when all keys are lost, or when the system doesn’t allow cloning (like with newer encrypted chips - Ford 80-bit, Toyota H-chip, VAG MQB, etc.). It takes longer, but it’s the only way forward in a lot of modern cars.

Does the customer have a working key? Try cloning first. It’s faster, cheaper, and safe. No key at all (AKL)? You’re generating. No way around it. You’re dealing with encrypted, rolling-code systems? Generate. Older, basic chip system (e.g., ID46, 4C, non-encrypted 4D)? Clone will usually work. If you’re unsure, scan the key with your programmer. Good tools will tell you if it’s cloneable. If not, don’t force it. Just go to generation.

What Chips Are You Gonna See the Most?

You don’t need to memorize every chip ever made. Just know the common ones you’ll run into on the job:

1. ID46 (PCF7936) – Found in tons of GM, Renault, Peugeot, and Honda vehicles. Super common, and cloneable.
2. 4D series (ID60–ID68) – Used in Toyota, Nissan, Ford, and more. Some are cloneable, some aren’t, depends on bit type.
    ID60/63 are cloneable; ID67/68 (encrypted) require generation.
   
3. 4C (Texas chip) – Found in old Toyota and Ford models. Dead simple. Easy to clone.
4. ID48 (Megamos) – Volkswagen Group vehicles. Usually needs generation; cloning is tricky or blocked.
5. 8A (HITAG-AES) – Hyundai, Kia, Subaru. No cloning here. You’re generating.
6. Ford 80-bit – No cloning. Use special chips. Always generate.
7. MQB (NXP) – Modern VW/Audi/Skoda. You need tools like Autel, VVDI, or Lonsdor. Definitely generate.
8. Toyota H-Chip – Anything 2014+. Don’t waste your time trying to clone. Generate with the right tools.
   
   

And remember: cloning encrypted chips doesn’t work. If you’re burning through super chips trying to clone a Toyota H-chip, you’re wasting money.

Pro Tools You Need to Use These Chips: 

Autel Tools (IM508, IM608, KM100)

• Pair great with AT100 chips (covers almost every protocol: ID11 to non-encrypted 4D—but not MQB or 8A).
  
• XP200/XP400/XP400PRO are used to read/write chips.
  
  

Note: XP200 doesn’t support reading encrypted protocols like 4D67/68 and 8A. Don’t find out mid-job, know your tool’s limits.

Advice: Mix Your Inventory Smart

Superchips are great, but don’t ONLY rely on them. Keep a mix:

• A stash of OEM/aftermarket chips for those “superchip-can’t-handle-it” moments
• XT27A or AT100 super chips for quick work and cloning
• Know which cars in your area are common, and stock chips for those models
  
  

If you’re stuck or unsure which chip works, use Keyless City’s YMM Tool or hit the live chat. Better to ask than to blow a job.

You’re not just cutting keys. You’re syncing tech with machines rolling off the line every year. Know your tools, keep your inventory sharp, and be ready for whatever pulls into your lot.

If you’re just starting out, cloning is the money-maker. Quick jobs, good profits, minimal hassle. But generation is what separates the rookies from the pros. If you wanna handle lost key situations, newer models, or make a name in this game, you’ve gotta get comfortable with generation.

Keep a stash of Xhorse super chips (XT27A) or similar, they work with most cloning jobs and can be used for generation too. Know your chip types, trust your tools, and never guess blindly. That’s how you make clean money and build a rep.

Why Choose Our Transponder Chips?

Wide Vehicle Coverage

• Compatible with Ford, GM, Toyota, Honda, BMW, Mercedes, and more
• Supports common frequencies (125kHz, 128kHz, 134.2kHz)
• Works with Texas Instruments, Philips Crypto, and Hitag systems
  
  

Professional-Grade Quality

• OEM-equivalent performance – No programming errors or failures
• Cloneable & programmable – Compatible with AD900, Xhorse, and Autel tools
• Durable construction – Resistant to signal interference and damage
  
  

Bulk & Cost-Saving Options

• Sold individually or in packs (10/25/50 units)
• Discounts for locksmiths and dealerships
• Same-day shipping on orders placed by 3 PM CST
  
  

Common Uses

• Key replacements – When original chips are lost or damaged
• Fleet key management – Bulk programming for commercial vehicles
• Emergency services – Quick-turnaround solutions for lockouts
  
  

Need the Right Chip for the Job?
→ Live chat with our transponder specialists for instant recommendations
→ Use our YMM search Tool to match chips by vehicle make, model, and year

Need help identifying the right chip? Contact us for a free compatibility check!