In the 2026 BMW 3 Series lineup, the 330i starts at $48,000 MSRP and the range tops out with the M340i xDrive at $64,300 MSRP, covering everything from a 255-horsepower commuter that earns an EPA-estimated 35 MPG on the highway to a 386-horsepower sport sedan that reaches 60 mph in about 4.1 seconds. Both engines now carry 48-volt mild-hybrid technology, so throttle response off a stoplight and through the I-80 merge lanes feels sharper than the numbers alone suggest.

At BMW of Napa Valley, the 2026 3 Series is stocked in depth, with a particularly strong selection of 330i xDrive sedans on the ground right now. This review is the starting point of our 3 Series research hub for Northern California drivers: engines, trims and pricing, technology, interior space, safety, and a straightforward guide to which build to pick.

Powertrains

2026 BMW 3 Series Engines and Powertrain Options

Every 2026 3 Series pairs its engine with an 8-speed automatic transmission; rear-wheel drive is standard on every 3 Series, and xDrive all-wheel drive is available on every 3 Series. New for this generation's final act, the 48-volt mild-hybrid system now supports the 330i as well as the M340i, smoothing the auto stop-start and adding a measurable shove at low rpm.

330i: 2.0L TwinPower Turbo Inline 4-Cylinder

The 330i's 2.0L TwinPower Turbo 4-cylinder produces 255 horsepower and 295 lb-ft of torque, enough for a 5.6-second run to 60 mph while the rear-wheel-drive version earns an EPA-estimated 28 MPG city / 35 MPG highway / 31 MPG combined. It is the balanced pick, and the reason the 330i remains the volume heart of the lineup.

M340i: 3.0L M TwinPower Turbo Inline 6-Cylinder

The M340i steps up to a 3.0L M TwinPower Turbo inline 6-cylinder with 386 horsepower and 398 lb-ft of torque, and the M340i xDrive reaches 60 mph in about 4.1 seconds. Despite that output, the M340i still returns an EPA-estimated 29 MPG combined. M Sport Brakes and an M Sport Differential are standard, so the hardware matches the engine.

Above both sits the BMW M3, the full M division flagship of the 3 Series family. Production of the current M3 generation winds down in 2027, and allocation is limited, so most performance shoppers here cross-shop the M340i first. You can browse the M lineup on our M models page.

Lineup

3 Series Trim Lineup and Pricing

The 2026 lineup is four builds deep: two engines, each with rear-wheel drive or xDrive. Adding xDrive costs $2,000 on either engine.

Trim	Engine	Drivetrain	Starting MSRP
330i	2.0L turbo 4-cylinder, 255 horsepower	Rear-wheel drive	$48,000 MSRP
330i xDrive	2.0L turbo 4-cylinder, 255 horsepower	xDrive all-wheel drive	$50,000 MSRP
M340i	3.0L turbo 6-cylinder, 386 horsepower	Rear-wheel drive	$62,300 MSRP
M340i xDrive	3.0L turbo 6-cylinder, 386 horsepower	xDrive all-wheel drive	$64,300 MSRP

330i and 330i xDrive

The 330i starts at $48,000 MSRP and arrives well equipped rather than as a stripped entry point, and the M Sport Package available on the 330i adds the aerodynamic kit and M design upgrades. The 330i xDrive starts at $50,000 MSRP and is the same car with all-wheel-drive traction, the build we stock most heavily.

M340i and M340i xDrive

The M340i starts at $62,300 MSRP and is the performance pick short of a full M car, with 19-inch wheels, upgraded brakes, and the sport differential standard on the M340i. The M340i xDrive starts at $64,300 MSRP and adds all-weather grip to the same hardware. For equipment detail on every build, see our trim-by-trim comparison.

MSRP excludes the $1,350 destination fee, tax, title, license, and dealer fees. Pricing and equipment can change; confirm current pricing with the dealership.

Cockpit Tech

Technology and Connectivity

Every 2026 3 Series centers on the BMW Curved Display, a single glass panel that joins the digital instrument cluster with a 14.9-inch central touchscreen. Wireless device charging is standard on the 330i, and remote start plus proximity keyless entry are standard on the M340i. A Harman Kardon sound system, available across the 3 Series lineup, upgrades the audio, and it is one of the options we would point a daily commuter toward first.

Cabin

Interior and Comfort

The 330i comes standard with SensaTec upholstery, heated 12-way power front seats, dual-zone automatic climate control, ambient lighting, and a moonroof, so the cabin reads as premium before a single option is added. The driving position stays low and centered on the driver, the reason so many owners keep coming back to this car. Between summer valley heat, winter tule fog, and stop-and-go interstate commutes, the 330i's standard heated seats and climate control earn their keep across a Northern California year.

Space

Cargo and Passenger Space

The 3 Series seats five and carries 16.9 cubic feet of trunk space, roomier than is typical for a compact luxury sedan, with a 40/20/40 split-folding rear seat that opens up longer cargo when you need it. Full dimensions live on our 2026 3 Series specifications page.

Driver Assistance

Safety and Driver Assistance

Forward collision mitigation and lane keeping assistance come standard on every 2026 3 Series. The M340i adds standard blind-spot warning, rear cross-traffic alert, lane departure warning, and front and rear parking sensors. The available Driving Assistance Professional package brings Active Cruise Control with Stop and Go, Active Lane Keeping Assistant, Traffic Jam Assistant, and Evasion Aid, and it is the box we would check for anyone who commutes the I-80 corridor daily.

Buyer Guide

Which 2026 BMW 3 Series Is Right for You?

If You Mostly	Our Pick	Why
Commute daily on the interstate	330i	255 horsepower with an EPA-estimated 31 MPG combined is the efficiency sweet spot of the lineup.
Want year-round grip for foggy mornings and hill routes	330i xDrive	All-wheel-drive traction for a $2,000 premium, and the build with the deepest selection on our lot today.
Want serious performance with daily comfort	M340i	386 horsepower, M hardware, and about 4.1 seconds to 60 mph in xDrive form, yet still 29 MPG combined, EPA-estimated.
Want the full M experience	BMW M3	Allocation is limited as this generation winds down, so ask us early about availability.
Are waiting for an electric 3 Series	Drive a 330i xDrive now	The 2027 BMW i3 arrives next year; the 48-volt mild-hybrid 3 Series is here today.

Every build above is on our new 3 Series inventory, where you can compare window stickers side by side, and our team can run current numbers on any of them through BMW financing, starting from the 330i xDrive's $50,000 MSRP. Cross-shopping outside the brand? Start with our 3 Series vs Mercedes C-Class comparison.

Your Local BMW Center

Why Buy the 2026 BMW 3 Series at BMW of Napa Valley in Fairfield?

BMW of Napa Valley has priced its cars without negotiation since 1995: the price on the car is the price, researched against the market, which makes comparing a 330i to an M340i a conversation about the right build instead of a back-and-forth. We serve 3 Series drivers from Vacaville and Dixon down the interstate, Vallejo and American Canyon along Highway 29, and Suisun City just across Highway 12. Contact our team to set up a test drive, and value your trade online before you visit.

Quick Answers

2026 BMW 3 Series Frequently Asked Questions

Explore the 2026 BMW 3 Series Research Hub