VAG JB1 JB4 upgrade kit

VAG JB1 JB4 BETA Upgrade Kit MQB Tsi

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Upgrades your existing BMS Stage1 to a EA888 JB4 BETA system. The JB4 BETA features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.

The introductory upgrade cost is £60 plus a £85 core charge. Original purchasers of the Stage1 hardware can return their Stage1 board back after the swap along with a purchase receipt to receive a £85 core refund. If you did not purchase your Stage1 hardware new from BMS or an authorized reseller you can still return your Stage1 board back to receive a £35 core refund. Core refunds must be submitted within 30 days of upgrade kit shipment to qualify. This JB4 requires exclusive OBDII/CANbus access while tuning is enabled and is not compatible with various CANbus enabled boost gauges or 3rd party devices that also require OBDII/CANbus.

When ordering use the drop down to specify left or right drive hand and your Stage1 hardware version. Vehicles in the USA and most other countries are left hand drive (LHD) while UK, AU, SA, and a few others are right hand drive (RHD). For the Stage1 hardware version systems purchased after approx 11/1/16 are REV2 and can be identified by an unused black Molex/2 position connector already incorporated in to the harness. Check the installation guide below for additional information on identifying your existing hardware.