BMS BMW N55 B58 JB4 EWG Add On Connector - Electronic Wastegate Harness for F Series BMW M135i, M140i, M240i and 335i
Unlock precise boost control on your BMW F Series N55 or B58 engine with the genuine Burger Motorsports JB4 Electronic Wastegate Add On Connector. This JB4 EWG harness enables your JB4 to directly control the electronic wastegate, raising the boost ceiling on more heavily modified cars and delivering smoother, stronger performance when running popular upgrades like E85 ethanol blends or water meth injection. Perfect for BMW M135i, M140i, M240i and 335i models equipped with an electronic wastegate, this plug-in EWG add-on is the must-have JB4 accessory for serious N55 and B58 tuning.
We run this BMS JB4 EWG Add On Connector on our own builds and it has been a standout upgrade for drivability and control. Customers consistently report sharper response, improved boost management and reduced boost creep. If you are tuning a BMW N55 or B58 with a JB4, this electronic wastegate connector is the simple step that lets the JB4 do its best work.
Why choose the BMS JB4 EWG Add On Connector
- Direct JB4 control of the electronic wastegate for accurate boost management
- Raises the boost ceiling on modified N55 and B58 engines
- Ideal with E85 mixtures and water meth injection setups
- Helps prevent boost creep and throttle closure with freer-flowing exhausts
- Plug-in add-on for JB4-equipped F Series BMW with electronic wastegate
- Genuine Burger Motorsports part for proven reliability
Key technical notes
- For 2014+ F Series BMW N55 and B58 engines with an electronic wastegate and JB4 installed
- Connector is not used on JB4 map 1 or map 2 even if installed
- B58 and E85: small ethanol blends of around 10 to 20 percent can be mixed, but the platform’s internal fuel cap may reduce the DME’s internal boost target as fuel volume increases. Expect slightly less boost with higher ethanol content. Vehicles with factory PPK may tolerate a heavier ethanol mix
- Installation routing and pin references are covered in the official BMS directions linked below
Additional information and directions from Burger Motorsports: n54tech.com JB4 EWG information
Compatibility
Compatible with F Series BMW N55 and B58 vehicles equipped with an electronic wastegate and JB4. Popular applications include BMW M135i, M140i, M240i and 335i with EWG. If you are unsure whether your car has an electronic wastegate, see the image below or contact us for a quick check.
Identifying wastegate type
Fitting and support
Want professional installation and setup for your BMW N55 or B58 JB4 EWG harness? Nforcd offers fitting in Warwickshire. Request a quote via Sales@nforcd.com and our team will be happy to help with product selection, installation and JB4 configuration.
Compatibility check before dispatch
To ensure the part fits your vehicle, we run a compatibility check prior to dispatch. Provide your UK registration number or the last 7 digits of your VIN at checkout and we will verify fitment.
Details
Part number: F-N55-F30-JB4-EW-AOC
Manufactured by: Burger Motorsports
Warranty: BMS does not offer a warranty on this product
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