JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19
JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19
JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19
JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19
JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19
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  • Load image into Gallery viewer, JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19

JB4 Plug-and-Play Piggyback ECU Tuning Box for VW Taos 1.5 TSI 2021+ & VW Jetta 1.5 TSI 2022+ (North American Models) Group 19

£622.70
£622.70
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Unlock responsive, reliable power with the JB4 Group 19 plug-and-play tuning box for the 2021+ VW Taos 1.5 TSI and 2022+ VW Jetta 1.5 TSI. This advanced piggyback ECU upgrade uses CANbus integration to deliver smooth, configurable performance gains while retaining factory safety systems. Nforcd supplies this popular JB4 kit and supports customers with expert advice and optional fitting.

  • Power gains on pump fuel: on 91 octane expect around 35 hp and 50 ft lb, and on 93 octane around 45 hp and 60 ft lb on a conservative setup
  • True plug-and-play installation with CANbus/OBDII integration for refined, factory-like drivability
  • Real-time safety monitoring for boost, air/fuel, fuel trims and knock, plus direct AFR control
  • Up to 8 preloaded maps, including ethanol E85-compatible options, with boost-by-gear for improved traction
  • Integrated water/meth control support
  • Read and clear fault codes, and log up to 40 parameters via the JB4PRO app
  • Optional JB4 PRO Bluetooth adapter allows wireless map switching, data logging and free firmware updates from your iOS or Android device
  • Not VIN-locked, easily removable and transferable
  • Rugged billet aluminium enclosure, designed and assembled in the USA
  • Compatible with all driving modes, with fuel economy unchanged during normal driving
  • 91 octane fuel or better required for performance gains
  • 5 year warranty

Vehicle fitment
2021+ VW Taos 1.5 TSI (North American model only)
2022+ VW Jetta 1.5 TSI (North American model only)

Part number / group
JB4 Group 19

The JB4 is a user-adjustable tuning solution that intercepts and optimises key engine signals to enhance boost, timing and fuelling while maintaining OEM safeguards. Map switching, data logging and ongoing free firmware updates make it a flexible upgrade for daily driving and spirited use. Nforcd knows this product well and it has been a favourite choice for customers seeking a fast, reversible upgrade without an ECU flash.

Ready to transform your VW? Order your JB4 Group 19 from Nforcd today. Professional fitting is available at Nforcd in Warwickshire - request a fitting quote via Sales@nforcd.com.