PSA Key Calculator

Work out the PSA unlock response from a 4 byte seed and a 2 byte PIN, or work backwards from a response to find the PIN that made it.

Seed and PIN

Enter the seed from the ECU and the 2 byte PIN to work out the unlock key.

Run the calculator to see the 4 byte unlock response and both words.

Find the PIN

Already have the unlock response? Pair it with the same seed to find the 2 byte PIN.

Submit a lookup to reveal every PIN that reproduces the response.