BMW's electric lineup includes two main models: the i3 and the i4

BMW makes two electric vehicles you're likely to encounter: the i3, a smaller city car that's been around since 2013, and the i4, a mid-size sedan that arrived in 2021. Neither is called the "3 Series Electric" — BMW kept the 3 Series name for gas and plug-in hybrid versions. If you've heard someone mention an electric BMW in the 3 Series class, they're usually talking about the i4, which competes in that size and price range.

The i3 is built for urban driving: it's narrow, short, and designed to fit in tight parking spaces. The i4 is a traditional four-door sedan that looks and feels more like a conventional BMW, just without the gas engine. Both run entirely on battery power — they don't have a gas engine as backup, unlike plug-in hybrids.

Key Takeaways

  • The i4 is BMW's electric sedan in the mid-size class, while the i3 is a smaller city-focused vehicle; the "3 Series" name does not explore to either electric model.
  • The i4 typically offers 200 to 300 miles of range depending on the model year and trim, while the i3 offers roughly 150 to 200 miles.
  • Both vehicles charge at home using a Level 2 charger (240 volts) or at public DC fast-charging stations, with charging time ranging from 30 minutes to overnight depending on the charger type.
  • BMW's electric vehicles cost more upfront than comparable gas cars, but lower fuel and maintenance costs can offset that difference over time.
  • Battery degradation is normal and gradual; BMW warranties the battery for eight years or 100,000 miles, whichever comes first.

How far each model can drive on a single charge

The i4 comes in two main versions. The i4 eDrive40 typically offers around 260 miles of range, while the i4 M50 (the sportier version) offers roughly 240 miles. These numbers come from EPA testing and assume highway and city driving mixed together. Real-world range depends on weather, driving habits, and terrain — cold weather and highway driving both reduce range.

The i3 offers less range because it's a smaller car with a smaller battery. Most recent i3 models deliver between 150 and 200 miles per charge. If you drive mostly in the city and charge at home every night, this is usually enough. If you take frequent long trips, the i3 becomes less practical without planning around charging stops.

Both vehicles show you remaining range on the dashboard and can send that information to your phone through BMW's app. You can also use the app to see charging station locations and check whether a station is currently available.

Charging at home versus using public stations

Most i3 and i4 owners charge at home overnight using a Level 2 charger, which runs on 240 volts (the same voltage as an electric dryer). Installing one costs between $500 and $2,000 depending on your home's electrical setup. A Level 2 charger adds roughly 25 to 30 miles of range per hour, so an overnight charge (8 to 10 hours) fully replenishes the battery.

If you don't have a garage or driveway, or if you need to charge away from home, you'll use public charging stations. DC fast chargers are the quickest option — they can add 150 to 200 miles in 20 to 30 minutes, though charging slows down as the battery fills. Level 2 public chargers work like home chargers but are slower (25 to 30 miles per hour). Apps like PlugShare and ChargePoint show you station locations and whether they're working.

The i4 and i3 both come with a cable that lets you charge from a standard 120-volt outlet, but this is very slow — roughly 2 to 3 miles of range per hour. It's useful only for emergencies or if you're parked for many hours.

What maintenance costs look like compared to gas cars

Electric vehicles have far fewer moving parts than gas cars. There's no oil to change, no transmission fluid, no spark plugs, and no timing belt. The i3 and i4 don't need traditional engine maintenance at all. You still replace brake pads and tires, rotate tires, and replace cabin air filters — the same as any car.

However, electric cars use regenerative braking, which means the motor slows the car and captures energy when you lift off the accelerator. This dramatically reduces brake wear, so brake pads last much longer than in gas cars. Many owners report their original pads lasting the life of the vehicle.

The battery itself requires no maintenance. BMW warranties the battery for eight years or 100,000 miles (whichever comes first) against defects. Battery degradation happens gradually — most owners see a 5 to 10 percent loss of capacity over the warranty period, which is normal and expected. After the warranty expires, battery replacement is expensive (typically $5,000 to $15,000 depending on the model), but most batteries last well beyond the warranty period.

Price and what affects the total cost

The i4 starts around $60,000 to $65,000 before incentives, while the i3 starts around $45,000 to $50,000. These prices vary by model year and trim level. A federal tax credit of up to $7,500 may be available if you meet income and vehicle assembly requirements, though not all BMW models may have access to in all years — check the IRS website for current rules.

Some states and utilities offer additional rebates or tax credits for electric vehicle purchases. California, New York, and several others have their own programs. Your state's energy office website will list what's currently available.

Over time, the lower cost of electricity (compared to gas) and minimal maintenance can offset the higher purchase price. If you drive 12,000 miles per year and electricity costs $0.14 per kilowatt-hour in your area, charging costs roughly $0.04 per mile. Gas at $3.50 per gallon in a 30-mpg car costs roughly $0.12 per mile. The difference adds up, though it varies by your local electricity rates and gas prices.

How battery degradation and warranty coverage work

All lithium-ion batteries lose capacity over time — this is chemistry, not a defect. The i3 and i4 batteries typically lose 5 to 10 percent of their capacity over eight years of normal use. You'll notice this as a slight reduction in range, but it's gradual enough that most owners don't perceive it month to month.

BMW covers the battery under warranty for eight years or 100,000 miles. If the battery loses more than 70 percent of its capacity during that period, BMW will repair or replace it at no cost. After the warranty expires, you own any degradation. Battery replacement is expensive, but real-world data shows most BMW batteries retain 80 to 90 percent of their capacity at 100,000 miles, so replacement is rare within a typical ownership period.

Extreme heat and frequent DC fast charging can speed up degradation slightly. If you live in a very hot climate or use DC fast chargers multiple times per week, your battery may degrade a bit faster than average. Most owners who charge at home with Level 2 chargers see minimal degradation.

Real-world driving differences between the i3 and i4

The i3 feels nimble and quick in city traffic because it's light and has when ready electric torque. It's fun to drive in tight spaces, but the smaller battery means you plan around range on longer trips. The i3 is best for someone whose daily commute is under 100 miles and who charges at home every night.

The i4 feels like a normal BMW sedan — smooth, responsive, and comfortable on highways. The larger battery means fewer charging stops on road trips. The i4 M50 adds sportier handling and quicker acceleration, but uses slightly more energy and has a bit less range. The i4 works for someone who wants an electric car that doesn't feel like a compromise.

Both cars are quiet inside because there's no engine noise. Wind and tire noise become more noticeable than in gas cars. Both have good interior space for passengers, though the i3's smaller size means less cargo room.

Frequently Asked Questions

Can I take a BMW i4 on a long road trip?

Yes, but you'll need to plan charging stops. With 260 miles of range and DC fast chargers adding 150 miles in 30 minutes, a 500-mile trip requires roughly two 30-minute charging breaks. Apps like A Better Route Planner show charging station locations along your route and estimate charging time based on your car's battery level.

What happens to the battery in cold weather?

Cold reduces range by 20 to 40 percent because the battery works less efficiently and the car uses energy to heat the cabin. If you normally get 260 miles in mild weather, expect 150 to 200 miles in winter. The range returns when the car warms up — it's not permanent damage.

Do I need a special electrical permit to install a home charger?

Most areas require a permit and inspection before installation. An electrician who installs EV chargers will handle this as part of the job. Costs typically include the permit fee (usually $50 to $200) plus the electrician's labor and the charger hardware itself.

Is the i3 or i4 better for someone who rents and can't install a home charger?

The i4 is more practical because its larger range means you can rely on public charging less often. The i3's shorter range makes it harder to manage without home charging. Check whether your area has reliable public charging networks before choosing either car without home charging access.

How does the i4's performance compare to a gas 3 Series?

The i4 M50 accelerates faster than most gas 3 Series models because electric motors deliver maximum torque when ready. The i4 eDrive40 is quick but not as sporty. Handling is similar — both are balanced and responsive. The main difference is noise: the i4 is nearly silent, while the gas car has engine sound.