Wirelessly connect your JB4 to your phone!
For JB4 systems produced 2017 and later. Please check board diagrams to properly identify your JB4 before ordering.
Alter parameters and fine-tune � wirelessly!
For use with N54 JB4 systems and any JB4 manufactured prior to 2017. Please check board diagrams to properly identify your JB4 before ordering.
Brand:
ES#:
3508698
Mfg#:
JB4-BT
In Stock
$149.00
This product was last offered at the strikethrough price on 05-12-2026
Plug & play power — gain up to 60 horsepower on a stock car, 100+ horsepower on a modified car! For 2012 and newer vehicles.
Not for sale or use in the state of California.
Plug & play power — gain up to 60 horsepower on a stock car, 100+ horsepower on a modified car! For 2011 model year vehicles or older.
Not for sale or use in the state of California.
Flash your ECU and unleash the power your BMW was meant to have.
CARB certified for sale in all 50 states For BMWs with a model year up to 2011 only, will not work with 2012+ models
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail.
Increase performance without sacrificing reliability
Brand:
ES#:
3981359
Mfg#:
77-86311
Back Ordered
ON SALE!
$581.00
This product was last offered at the strikethrough price on 08-03-2026
$537.43 USD
Free Shipping
on orders $49 and up
Lifetime Replacement
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