2021 BMW 4 Series Convertible Preview

FAST FACTS
  • Redesigned 4-seat luxury convertible
  • 430i and more powerful M440i model series
  • Turbocharged 4-cylinder and 6-cylinder engines
  • Available mild-hybrid engine technology
  • Optional all-wheel drive
  • Fabric roof folds or raises in 18 seconds
  • Larger trunk than before
  • All the latest infotainment and safety tech from BMW
  • Priced from $53,100
  • On sale in March 2021

Introduction - Find the best BMW deals!

Say what you might about the redesigned 2021 BMW 4 Series Convertible’s grille. Just remember that the same look worked well for Pontiac for decades.

Offered in 430i and M440i model series, each with available xDrive all-wheel drive, the 2021 BMW 4 Series Convertible price starts at $53,100. To get the more powerful and better performing 2021 BMW M440i Convertible, you’ll shell out $64,000. Add $2,000 each for xDrive, and another $995 for destination charges.

2021 BMW 4 Series Convertible Green Top Down Driving at Beach

The new BMW 4 Series Convertible goes on sale in March 2021. The xDrive versions arrive later, in July 2021.

Exterior Features - Find the best BMW deals!

Longer, wider, and slightly taller than the car it replaces, the redesigned 2021 BMW 4 Series Convertible is also more aerodynamic, and features standard LED lighting front and rear.

2021 BMW 4 Series Convertible Green Top Down Rear View

BMW drops the power retractable hardtop in favor of a power fabric roof that is 40% lighter, and it can open and close in 18 seconds while the car is traveling at speeds up to 31 mph. It has a flush rear window, features several insulation layers, and comes in black or a shimmering Moonlight Black. With Comfort Access, owners can remotely operate the top using the key fob.

You can paint your 4 Series Convertible in white or black without paying extra. The other nine paint colors cost extra. Some are restricted to the 430i or M440i, too.

Interior Features - Find the best BMW deals!

Ready to accept four passengers, the 2021 BMW 4 Series Convertible has new sport-bolstered seats and a leather-wrapped Sport or M Sport steering wheel. The 430i models include standard SensaTec simulated leather in black or beige. Leather is optional for the 430i and standard for the M440i, and BMW offers it in seven different colors. Ambient cabin lighting is also available.

2021 BMW 4 Series Convertible Dashboard Oyster Leather Seats

If you’re not going to use the 2-person rear seat, you can install the standard wind deflector to reduce top-down buffeting. A triple-zone automatic climate control system is standard, and BMW also offers heated and ventilated front seats and front neck warmers for the 4 Series Convertible.

BMW says it has improved interior storage, and thanks to the soft convertible top, the trunk space grows by 1.2 cubic feet to a total of nine cubes. A center pass-through into the cabin accommodates longer items when necessary.

Optional Features - Find the best BMW deals!

Do you want option packages? BMW has option packages galore for the new 4 Series Convertible. They include the Convenience (430i only), M Sport (430i only), Shadowline, Premium, Executive, Dynamic Handling, Driving Assistance Professional, and Parking Assistance packages.

Additionally, BMW offers numerous individual options to improve the car’s appearance, performance, comfort, and technology. 

Under the Hood - Find the best BMW deals!

A 2.0-liter turbocharged inline 4-cylinder engine powers the 430i, making 255 horsepower from 5,000 rpm to 6,500 rpm, and 295 pound-feet of torque from 1,550 rpm to 4,400 rpm. Compared to the previous 430i, these figures represent gains of 7 hp and 37 lb.-ft., respectively.

Choose the M440i for a 3.0-liter turbocharged inline 6-cylinder. It cranks out 382 hp between 5,800 rpm and 6,500 rpm, and 364 lb.-ft. of torque between 1,800 rpm and 5,000 rpm. These are significant gains of 62 hp and 39 lb.-ft. compared to the previous 440i.

The turbocharged 6-cylinder also uses mild-hybrid technology. A 48-volt starter/generator can improve performance under hard acceleration, supply power to electrical components to reduce the load on the gas engine, or increase activation of the automatic engine stop/start system to conserve fuel.

Both engines use an 8-speed sport automatic transmission with launch control. With the M440i, an M Sport differential and a new Sprint function are standard. Activate Sprint by pulling the left transmission shift paddle for a second. This action switches everything to Sport mode, and the transmission drops into the lowest possible gear for instant acceleration response.

According to BMW, the 430i Convertible accelerates to 60 mph in 5.9 seconds. The heavier M440i shaves that time down to five seconds flat. Both models top out at 155 mph when equipped with optional performance tires. 

The available xDrive AWD system only sends power to the front wheels when necessary, and it can do so in a fully variable manner. The 4 Series Convertible’s powertrains are also “smart” in that they consider data from the navigation system and speed limit information system to automatically predict and adjust vehicle speed based on the route ahead.

Both versions of the car sit on standard 18-inch wheels, with 19-inch wheels available as an upgrade. The 430i Convertible offers an optional M Sport suspension (standard M440i), and an Adaptive M Suspension is optional for both versions of BMW’s new drop-top.

Additional engineering upgrades for the 430i include variable sport steering and M Sport brakes. These components are standard with M440i specification.

Safety - Find the best BMW deals!

Every 2021 BMW 4 Series Convertible features structural bracing and enhancements to preserve safety even when the top is down. Plus, a standard rollover protection system deploys pretensioned bars from behind the rear head restraints when sensors determine that a rollover accident may occur.

Standard advanced driving assistance systems (ADAS) include forward collision warning with pedestrian detection, automatic emergency braking, blind-spot warning, rear cross-traffic warning, lane-departure warning, lane-keeping assistance, rear collision preparation, automatic high-beam headlights, and a speed limit information system.

The optional Driving Assistant Professional package adds adaptive cruise control with stop-and-go capability and Level 2 extended traffic-jam assistance for use on limited-access highways at lower speeds. Additionally, the new BMW 4 Series Convertible is available with automatic emergency stop assistance, front cross-traffic warning, active lane-keeping assistance, and evasion-steering assistance.

Technology - Find the best BMW deals!

Equipped with standard iDrive 7.0 infotainment technology, the 4 Series Convertible has an 8.8-inch touchscreen display. When optioned with Live Cockpit Professional, in addition to a 12.3-inch digital instrumentation display, the car includes a 10.25-inch infotainment screen.

Highlights include navigation, new BMW Maps technology, wireless Apple CarPlay and Android Auto smartphone mirroring, and BMW Intelligent Personal Assistant. That latter feature is a fancy name for natural voice recognition technology designed to work similarly to a smartphone assistant.

A Parking Assistance Package is available, equipping the 4 Series Convertible with several features. They include 3-D surround-view cameras with 3-D view function, semi-autonomous parking assistance for parallel and perpendicular spaces, and a digital drive recorder that, among other things, can automatically film and save the 20 seconds leading up to a collision. A back-up assistant that retraces your exact steering movements to get into a parking space, but in reverse, is also a part of this package.

BMW is the source of information in this article. It was accurate as of September 29, 2020, but it may have changed since that date.