Car OBDII diagnostic tool, odometer correction tool, ECU chip tuning tool, car key programmer, OBDII software technical support center.
Problem:
Failed to unlock a 2018 Toyota 8A smart key with EoneBoss TLK1 remote unlock device. However, it did a 2022 8A model. Any idea?
Solution:
The P4 page of this 8A smart key is A9.
EoneBoss TLK1 will unlock original Toyota/Lexus 8A 8A-AA BA B9 B8 smart keys. It cannot unlock original 8A A9 smart key.
Use other device instead.
ID46 vs. PCF7936 vs. Hitag2, these are three names that MANY people use as if they were one and the same.
And they are NOT.
In fact, confusing them can ruin a job.
Because:
And that is where it starts:
ID46 vs PCF7936 vs Hitag2
| Feature | ID46 | PCF7936 | HITAG2 |
| Manufacturer | Phillips | Phillips | NXP (formerly Philips) |
| Frequency | 125 kHz | 125 kHz | 125 kHz |
| Type | Passive RFID transponder | Passive RFID transponder | Passive RFID transponder |
| Chip | PCF7936 | PCF7936 / PCF7936AA / PCF7936AS | Hitag 2 |
| Memory | Read-only | Read-only | Read-only |
| Security | Medium | Medium | Medium-High |
| Main use | Immobilizers | Immobilizers | Immobilizers |
| Cloning/Copying | Yes (with compatible equipment) | Yes (with compatible equipment) | Yes (with compatible equipment) |
| Rewritable | No | No | No |
Brand & Models
| ID46 (PCF7936) | PCF7936 | HITAG2 |
| Toyota (some models) Lexus (some models) Subaru (some models) Honda (some models)Used mainly in Japanese and Asian models | VW, Audi, BMW, Peugeot, Citroen, Fiat, Renault, Opel, Benz (some models)Very common in European brands. | Benz (Some models) Ford (Some models) Volvo (Some models) Land rover (some models) Used in European and some American brands |
When are they interchangeable and when not?
Interchangeable in some cases
NON-Interchangeable
Quick Reference Table
| Model | Frequency | Chip | Memory | Manufacturer | Cross Compatibility | Most Common Vehicles |
| ID46 | 125 kHz | PCF7936 | Read-only | Phillips | Compatible with PCF7936 in some cases | Toyota, Lexus, Subaru, Honda (some) |
| PCF7936 | 125 kHz | PCF7936 / PCF7936AA / PCF7936AS | Read-only | Phillips | Compatible with ID46 in some cases | VW, Audi, BMW, Peugeot, Citroën, Fiat, Renault, Opel, Mercedes (some) |
| HITAG2 | 125 kHz | Hitag 2 | Read-only | NXP | NOT compatible with ID46 or PCF7936 | Mercedes-Benz, Ford, Volvo, Land Rover (some) |
NOTE: Always verify the correct transponder before programming. Using the wrong transponder = vehicle does not recognize the key.
Related item:
ID46 transponder chip (supports PCF7936)
Keydiy KD D26 super chip (supports PCF7936)
FYI: Some other transponder chip information/knowledge.
ID46 vs ID48
The question that most confuses beginners is this: How do the ID46 and ID48 differ if both are 48-bit chips?
The difference does not lie in the encryption level. It lies in the manufacturer and the protocol used.
The ID46 is Philips — Hitag 2. It was adopted by Renault, Fiat, Opel, BMW (in their CAS2 and CAS3 systems), and many others.
The ID48 is Megamos. It was developed specifically for the VAG Group — Volkswagen, Audi, Seat, and Skoda — and subsequently spread to Porsche, Volvo, and a few others.
These are parallel technologies from the same era. The base chip is different, the algorithm is different, and the equipment must recognize each one separately.
If your equipment states that it supports ID46 but makes no mention of ID48, it will not work on a Jetta. It’s as simple as that.
A Practical Reference: The Most Common Chips by Brand.
European vehicles:
Volkswagen and Audi: ID48 in models up to approximately 2013. ID49 AES on the MQB platform starting from 2014.
BMW: ID33 in EWS2 (1990s), ID44 in EWS3 and EWS4 (2000–2006), ID46 in CAS2 and CAS3 (2005–2012), ID47 in FEM and BDC (2012 onwards).
Renault: ID46 across practically the entire lineup since 2000—including the Clio, Megane, Logan, and Koleos.
Peugeot and Citroën: ID45 in generations produced between 2000 and 2010. Do not confuse this with the ID46, even if the hardware appears similar.
Fiat: ID13 in older models; ID48 in newer models; and ID46 in intermediate generations, depending on the specific model.
Opel: ID40 in older models; ID46 in models produced after 2005.
This roadmap tells you exactly which equipment you will need before the vehicle even arrives.
The ID48 Trap: Before and After CAN
The ID48 chip has a peculiarity that creates problems for beginners:
Not all ID48 chips are programmed in the same way.
Prior to 2005, in VW vehicles, the ID48 operated without a CAN bus. With compatible equipment, the chip could be cloned directly, provided the original key was present. It was a relatively straightforward process.
After 2005, VW migrated its IMMO system to the CAN bus architecture. It uses the same ID48 chip, but programming is now performed via the OBD port and requires the equipment to communicate directly with the control module. It is no longer a simple matter of cloning.
Furthermore, in models featuring the IMMO4 system within the VAG Group, even OBD programming is insufficient in some cases—you require direct access to the control module or platform credits from providers such as Autel, VVDI, or Lonsdor.
The name of the chip remains the same, but the work involved is completely different.
Here, obdii365.com will show the main types of chip transponders used by Japanese car brands.
01 TOYOTA / LEXUS I
D4D (68)
125 kHz
68 – ID4D
Manufacturer: NXP
Brands applied: Toyota, Lexus
Models applied: Camry, Corolla, RAV4, Land Cruiser, Hilux, Prado, Avalon, LS, RX, GS
Years: 1998–2005
02 TOYOTA / LEXUS II
D4D (72)
125 kHz
72 – ID4D
Manufacturer: NXP
Brands applied: Toyota, Lexus
Models applied: Camry, Corolla, Yaris, Highlander, Prado, GS, IS, ES, SC
Years: 2005–2010
03 TOYOTA / LEXUS III
D4D (80)
125 kHz
80 – ID4D
Manufacturer: NXP
Brands applied: Toyota, Lexus
Models applied: Corolla, Camry, Prius, Venza, Fortuner, Tacoma, Lexus RX, NX, LX, GX
Years: 2010 onwards
04 NISSAN / INFINITI
ID46
125 kHz
ID46
Manufacturer: NXP
Brands applied: Nissan, Infiniti
Models applied: Sentra, Altima, X-Trail, Patrol, Pathfinder, Maxima, Frontier, Qx56
Years: 1995 and above
05 HONDA / ACURA
ID47
125 kHz
ID47
Manufacturer: NXP
Brands applied: Honda, Acura
Models applied: Civic, Accord, CR-V, HR-V, Pilot, Odyssey, MDX, TL
Years: 1998 onwards
06 SUZUKI
ID4C
125 kHz
ID4C
Manufacturer: NXP
Brands applied: Suzuki
Models applied: Swift, Vitara, Grand Vitara, SX4, Jimny, Baleno, Liana, Ertiga
Years: 2000 onwards
07 MAZDA
ID49
125 kHz
ID49
Manufacturer: NXP
Brands applied: Mazda
Models applied: Mazda3, Mazda6, CX-5, CX-7, BT-50, Demio, Tribute, MPV
Years: 1999 onwards
08 SUBARU
ID4D (SUB)
125 kHz
ID4A
Manufacturer: NXP
Brands applied: Subaru
Models applied: Impreza, Forester, Legacy, Outback, WRX, XV, Tribeca, BRZ
Years: 1998 and later
09 MITSUBISHI
ID4A
125 kHz
ID4A
Manufacturer: NXP
Brands applied: Mitsubishi
Models applied: Lancer, Outlander, Pajero, Montero, ASX, Eclipse, Galant, Canter
Years: 1996 onwards
Related item:
EoneBoss TLK1 & TLK2 to unlock Toyota 8A 4A smart key
Eoneboss NK001/CGDI K2 to copy NXP NCF29Ax smart key
Question: It’s a Ford S Max and it has R5F64524 BCM. Need to clone this BCM, but found Ford Mondeo protocol with the same board. Is it possible read and write it with Xhorse Multi Prog?
Answer: Yes. Multi prog will clone Ford S Max BCM R5F64524 under Mondeo protocol.
To clone a Ford Delphi BCM with the Delphi R5F64524 MCU, you must transfer the Data Flash (D-Flash), Program Flash (P-Flash), and EEPROM from the original module to a replacement with the same part number. This process copies the VIN, immobilizer data, and mileage, making the new unit “plug and play” without needing additional programming like FORScan or As-Built resets.
User review:
Cloned Ford s max BCM by multiprog.
Read Dflash, data flash, eeprom ok.
Reading ok, writing verification was ok.
Customer are happy car runs good all accesories are working.
In the past, Yanhua Mini ACDP Module 44 only supported adding new or used original factory MQB49 5C/5D keys, which limited key selection compared to other devices.
Good news: ACDP Module 44 has released a free software update on May 20th, 2026.
It now supports adding XHORSE VVDI and KYDZ 5C/5D keys.
New Functions:
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Which Xhorse VVDI key can be used for MQB49 5C/5D system?
For MQB49 5C system:
Xhorse VVDI smart key (NXP, XM38, XM38 Toyota, XSMQB all ok).
For MQB49 5D system:
Xhorse 5D key (not available yet) or VVDI BMW F/G chassis smart keys.
Note: Keydiy KD keys have been program-encrypted by the manufacturer and cannot be used with ACDP devices.
