N54 JB4 G5 replacement board and enclosure for E90 E92 E82 F-series

Direct-fit replacement PCB and enclosure for the JB4 G5 tuning module on N54-powered BMWs - E90, E92, E82 and F-series chassis only. No coding, no specialist tools, no guesswork.

• Swaps straight into your existing JB4 G5 unit
• Includes full enclosure, PCB and mounting hardware
• Fully compatible with all standard JB4 G5 firmware versions
• Built for fast road or track day use - not a stopgap, but a proper rebuild