OVERVIEW
The S68 responds hard to a JB4. Burger Motorsports quotes gains of 125whp on pump gas and up to 260whp on higher octane or E85 mixtures, all without an ECU flash. The JB4 works through the engine's sensor network and CANbus, so it runs on locked DMEs and does not conflict with BMW's over-the-air software updates.
Installation is plug-and-play and fully reversible. Select your chassis at checkout — the harness differs between the XM and the X5M/X6M.
SPECS
- Gains of 125whp on pump gas and up to 260whp on higher octane or E85 mixtures
- Piggyback tuner — works through the sensor network and CANbus, with no ECU flash
- Runs on locked DMEs and does not conflict with BMW over-the-air software updates
- Multiple switchable maps, including E85 ethanol blends
- Boost-by-gear limiting for traction management
- Wireless smartphone control via the included JB4PRO adapter
- Live gauges, datalogging, and fault code reading and clearing
- Optional electronic wastegate configurations are covered in the install guide
- Plug-and-play installation, fully reversible
- Not VIN-locked
- Free firmware updates
- 5-year warranty
- Designed and assembled in the USA
PARTS INCLUDED
- JB4 tuner in a billet aluminum enclosure
- Chassis-specific plug-and-play installation harness (XM, or X5M/X6M)
- JB4PRO Bluetooth adapter
- Free JB4PRO smartphone app (iOS and Android)
TECH RESOURCES
Required Extras
- The correct chassis option selected at checkout — the harness differs between the XM and the X5M/X6M.
- 91 octane minimum for the pump gas maps; higher octane or an E85 blend to reach the quoted 260whp figure.
- A compatible smartphone running the free JB4PRO app for map switching, gauges and datalogging. The Bluetooth adapter is included.
Installation
VEHICLE APPLICATIONS
| Make / Model | Chassis | Engine | Years |
|---|---|---|---|
| BMW XM 4.4L | G09 | S68 4.4L Twin-Turbo V8 | 2023+ |
| BMW XM Label 4.4L | G09 | S68 4.4L Twin-Turbo V8 | 2024+ |
| BMW X5M LCI 4.4L | F95 | S68 4.4L Twin-Turbo V8 | 2024+ |
| BMW X6M LCI 4.4L | F96 | S68 4.4L Twin-Turbo V8 | 2024+ |
Burger Motorsports does not publish an official part number for this tuner, so no part number is listed. Pre-2024 X5M and X6M run the S63 — see the S63 F9x JB4 instead.