Hello everyone,
I’m trying to recover the radio code from a **Delphi B420 Low S&S** unit removed from a **Ford Ka (2009–2012 platform, shared with Fiat 500)**.
The radio requested the code after a battery disconnect, and unfortunately the original code card is missing.
I decided to read the EEPROM directly to try to recover the code.
Model:
Delphi **B420 Low S&S**
Part numbers found on the unit:
```
Prod Date : 1312
Serial Number : 7355597070
HW Ver : 28346965
28316510
```
EEPROM type:
24LC32 (I²C)
---
Programmer: CH341A USB programmer
Software used to read EEPROM:
NeoProgrammer
Connection method:
SOIC8 clip directly on the EEPROM (in circuit)
The radio was completely disconnected from the vehicle during the reading.
Dump1–first read original B420 unit selled with car
Dump2 – second read (identical to Dump1, confirming good contact)
Dump3 – dump from a second identical B420 unit, buyed to compare if the first one have any problem.
All dumps are **4096 bytes** (24LC32).
The first two dumps are identical, so the read should be correct.
I noticed a repeated block around address
80 02 32 14 64 00 14 19 6F 03 E2 1E 40 1F 32 06
00 80 02 32 14 64 00 14 19 6F 03 E2 1E 40 1F 32
ASCII view looks like:
..2.d...o...@.2.
This block is identical between different radios, so it probably isn't the code itself.
Large differences between dumps appear mostly in areas containing **RDS station names**, so those are probably user presets.
I would like help with one of the following:
1. Extracting the **radio code directly from the EEPROM dump**, or
2. Identifying the **offset/algorithm used by Delphi B420 Low units**, or
3. Confirming if the code is **calculated from an internal identifier rather than stored directly**.
If needed I can also provide:
* full EEPROM hex view
* pictures of the radio PCB
* EEPROM location
Thanks in advance for any help or guidance.
AI: Can you share the serial number from the radio’s label (not just the part numbers), as some code algorithms require it or use it as a basis for calculation?
7355597070283469651209001020
I’m trying to recover the radio code from a **Delphi B420 Low S&S** unit removed from a **Ford Ka (2009–2012 platform, shared with Fiat 500)**.
The radio requested the code after a battery disconnect, and unfortunately the original code card is missing.
I decided to read the EEPROM directly to try to recover the code.
Radio information
Model:
Delphi **B420 Low S&S**
Part numbers found on the unit:
```
Prod Date : 1312
Serial Number : 7355597070
HW Ver : 28346965
28316510
```
EEPROM type:
24LC32 (I²C)
---
Tools used
Programmer: CH341A USB programmer
Software used to read EEPROM:
NeoProgrammer
Connection method:
SOIC8 clip directly on the EEPROM (in circuit)
The radio was completely disconnected from the vehicle during the reading.
Dumps obtained
Dump1–first read original B420 unit selled with car
Dump2 – second read (identical to Dump1, confirming good contact)
Dump3 – dump from a second identical B420 unit, buyed to compare if the first one have any problem.
All dumps are **4096 bytes** (24LC32).
The first two dumps are identical, so the read should be correct.
I noticed a repeated block around address
0x0B30in the dumps:
80 02 32 14 64 00 14 19 6F 03 E2 1E 40 1F 32 06
00 80 02 32 14 64 00 14 19 6F 03 E2 1E 40 1F 32
ASCII view looks like:
..2.d...o...@.2.
This block is identical between different radios, so it probably isn't the code itself.
Large differences between dumps appear mostly in areas containing **RDS station names**, so those are probably user presets.
I would like help with one of the following:
1. Extracting the **radio code directly from the EEPROM dump**, or
2. Identifying the **offset/algorithm used by Delphi B420 Low units**, or
3. Confirming if the code is **calculated from an internal identifier rather than stored directly**.
If needed I can also provide:
* full EEPROM hex view
* pictures of the radio PCB
* EEPROM location
Thanks in advance for any help or guidance.
AI: Can you share the serial number from the radio’s label (not just the part numbers), as some code algorithms require it or use it as a basis for calculation?
7355597070283469651209001020
