BMW F10/F11/F18 535i Stage 1 (306PS / Auto) - Reviews | MEVD172X

Hi, how to check if SW 509058 / Bosch 75796A0B 6A0B in my F10 N55i ?

mrguru said:

Hi, how to check if SW 509058 / Bosch 75796A0B 6A0B in my F10 N55i ?

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There are a few ways to verify your ECU software and hardware numbers before purchasing:

Option 1 – BMW Diagnostic Software (ISTA / Rheingold)
Connect with ISTA/ISTA+ (Rheingold) via an ICOM or ENET cable. Navigate to your DME module under the vehicle identification screen. It will display:

• ECU-Nr. Prod (hardware number) – should match 75796A0B
• Software version – should match 509058

Option 2 – ENET Cable + Bimmerlink / BimmerCode
Apps like Bimmerlink or BimmerCode (via OBD Wi-Fi/BT adapter or ENET) can read the DME module info. Look for the ECU hardware number and calibration/SW version in the module details.

Option 3 – Read the ECU with a Tuning Tool
If you already have a flash tool that supports MEVD172X (e.g. Autotuner, CMD, KESSv2, KTAG, etc.), do an OBD identification read first — most tools will show the Bosch HW number and SW version before you do a full read. Compare:

• ECU HW: 75796A0B (the "6A0B" suffix is the short form)
• SW: 509058
• File size: 2 097 152 bytes (2 MB full read)

Option 4 – Physical ECU Label
If the ECU is accessible (passenger side footwell area on F10), the Bosch sticker on the ECU housing will show the part number and HW revision. However, the SW version is only readable electronically.

Important: Both the HW number and SW version must match. If your car has had a dealer software update at some point, the SW may differ from 509058 even if the hardware is the same. In that case this file would not be compatible — you'd need a calibration matched to your actual SW version.

If SW and HW matched, this tune can use for any VIN without issue ?

mrguru said:

If SW and HW matched, this tune can use for any VIN without issue ?

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Yes, for the MEVD172X platform (N55), the tuning file is not VIN-locked at the calibration level. If your HW (75796A0B) and SW (509058) match, the modified file will work regardless of VIN.

However, a few things to keep in mind:

• ISN / DME-GS synchronization – The MEVD17 stores the ISN (Individual sеriаl Number) which is paired to your CAS and transmission. As long as you are only flashing the calibration area (maps/tables) and not touching the program area or ISN block, the VIN/ISN pairing remains intact. Any proper OBD flash tool (Autotuner, CMD, KESS, etc.) will only write the calibration zone.
• Transmission adaptation – Since this is for automatic transmission, after flashing it's recommended to reset the gearbox adaptations (via ISTA or similar) so the TCU can re-learn the new torque values.
• Checksum – This file is listed as "Checksum: N/A", meaning your flash tool must handle checksum correction on its own. Most modern OBD tools do this automatically for MEVD17. Verify your tool supports it before writing.

So in short: SW + HW match = compatible, no VIN restriction on the calibration itself.