Universal Accessory Harness for the BMW/Supra S58 B58 B48 motors

Need a switched power source for your S58 B48 B58 equipped BMW/Supra? Our 12V accessory adapter is the solution for installing methanol, port injection, or other accessories!

If you need a switched power source to run your aftermarket accessories and don't want to run a wire through the fire wall to the fuse box we have the solution for you. Installation takes about 30 seconds and there is not cutting or splicing. Simply unplug the 4 pin connector on the ECU, plug in our fused adapter, and plug the ECU connector back in. You now have a 12 volt 10amp fused power source that is ready to use.

10 amp fuse included. 

Vehicle Fitment

• All B48/B58 Gen 2 BMW/Supra motors
• All S58 BMW motors

Burger Motorsports shipping & returns

• 30-day satisfaction guarantee: BMS tuning products can be returned in like-new condition in their original packaging within 30 days of shipment for a refund.
• Fees: 20% restocking fee on all returns; the customer pays all shipping charges.
• Not returnable: spark plugs that have been installed or gapped, and wheel spacers, lug bolts, lug nuts or wheel studs that have been mounted.
• Express shipping does not guarantee a delivery date. Import duties and taxes are not included in the price.

To start a return or ask a question, contact us with your order number.