2025 BMW 4 Series Coupe & Convertible: New 48V Mild Hybrid System, Updated Styling & Starting MSRP

2025 BMW 4 Series Summary Points

• The refreshed 2025 BMW 4 Series coupe and convertible are part of the second-generation 4 Series introduced in 2021.

• The 2025 4 Series receives a 48V mild hybrid powertrain for the 2.0-liter four-cylinder and 3.0-liter turbocharged engines.

• Updates include revised front grille designs, new laser-accent taillamps, and a slightly reconfigured interior.

2025 BMW 4 Series: What’s New?

For 2025, the 4 Series has undergone a mild inside-and-out freshening, gaining a 48V mild-hybrid system for both the 2.0-liter four-cylinder and 3.0-liter turbocharged inline-six.

The BMW 4 Series, both coupe and convertible variants, are available in 10 different paint colors, eight of which are metallic. Cape York Green metallic and Vegas Red metallic are new for the 2025 model year, although a wide array of BMW Individual paint finishes are also available.

2025 BMW 4 Series Powertrain

The 4 Series remains available in two distinct variants. The base 430i coupe and convertible have a 2.0-liter TwinPower Turbo Miller cycle four-cylinder with a reconfigured ignition system, redesigned intake ports and combustion chambers, revised camshaft control, and a mild-hybrid system to produce 255 horsepower and 295 lb-ft. of torque – same as the outgoing 430i.

Meanwhile, the M440i has a 3.0-liter turbocharged inline-six and a 48V starter generator. Unlike the 430i, the hybrid system in the M440i has resulted in a power hike. With a total system output of 386 horsepower and 398 lb-ft. of torque, the 2025 M440i has four more horses and 29 more lb-ft. of torque. The hybrid motor delivers an 11-horsepower boost when required.

Both engines receive an eight-speed automatic transmission that drives the rear wheels. BMW’s xDrive all-wheel drivetrain is available for the 430i and M440i coupe and convertible.

Fuel Economy

The official EPA numbers of the 2025 4 Series are forthcoming.

However, the 2024 BMW 430i Coupe with rear-wheel drive returns an EPA-rated 25 in the city, 34 on the highway, and 28 combined. The 2024 BMW M440i Coupe with rear-wheel drive delivers an EPA-rated 24/32 city/highway and 27 combined.

We expect similar numbers for the 2025 BMW 4 Series lineup.