The 2017 BMW 340 is available in multiple trims, each with its own estimated fuel economy, here are the EPA estimates for each trim:

1. I : 21 MPG City and 32 MPG Highway
2. XI Gran Turismo : 20 MPG City and 30 MPG Highway
3. XI : 21 MPG City and 31 MPG Highway

It is important to remember factors such as driving style, weather conditions, and the use of features such as Eco mode can impact fuel efficiency.

Here is what's new for the 2017 BMW 340:

• XI Gran Turismo
• Panoramic Sunroof
• Power Hatch/Deck Lid
• Rear Spoiler
• Automated Parking