Compare the2025 BMW 3 Series SedanVS 2025 Kia K5

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Cargo Capacity
Servicing Ease
Ergonomics
Recommendations

Safety

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The 3 Series Sedan’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The K5 doesn’t offer pre-crash pretensioners.

The BMW 3 Series Sedan has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The K5 doesn’t offer a front passenger side knee airbag.

The 3 Series Sedan has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The K5 doesn’t offer a whiplash protection system.

The 3 Series Sedan has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The K5 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

The 3 Series Sedan has standard BMW Assist, which uses a global positioning satellite (GPS) receiver and a cellular system to remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The K5 doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the 3 Series Sedan and the K5 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available all wheel drive, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The 3 Series Sedan’s corrosion warranty is 7 years and unlimited miles longer than the K5’s (12/unlimited vs. 5/100,000).

BMW pays for scheduled maintenance on the 3 Series Sedan for 3 years and 36,000 miles. BMW will pay for oil changes, tire rotations, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Kia doesn’t pay scheduled maintenance for the K5.

Reliability

The battery on the 3 Series Sedan is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the 3 Series Sedan’s battery 20 to 30 degrees cooler, its life is increased by years. The K5’s battery is in the hot engine compartment.

J.D. Power and Associates rated the 3 Series Sedan third among compact premium cars in their 2024 Initial Quality Study. The K5 isn’t in the top three in its category.

From surveys of all its subscribers, Consumer Reports’ January 2024 Auto Issue reports that BMW vehicles are more reliable than Kia vehicles. Consumer Reports ranks BMW 1 place higher in reliability than Kia.

Engine

The 330i’s standard 2.0 turbo 4-cylinder hybrid produces 64 more horsepower (255 vs. 191) and 114 lbs.-ft. more torque (295 vs. 181) than the K5’s standard 2.5 DOHC 4-cylinder. The M340i’s standard 3.0 turbo 6-cylinder hybrid produces 96 more horsepower (386 vs. 290) and 87 lbs.-ft. more torque (398 vs. 311) than the K5 GT’s standard 2.5 turbo 4-cylinder.

As tested in Car and Driver the M340i 3.0 turbo 6-cylinder hybrid is faster than the K5 GT 2.5 turbo 4-cylinder:

	3 Series Sedan	K5
Zero to 60 MPH	3.7 sec	5.1 sec
Zero to 100 MPH	9.5 sec	12 sec
5 to 60 MPH Rolling Start	4.5 sec	5.5 sec
Quarter Mile	12.2 sec	13.7 sec
Speed in 1/4 Mile	112 MPH	106 MPH
Top Speed	150 MPH	12 MPH

Fuel Economy and Range

On the EPA test cycle the 3 Series Sedan gets better mileage than the K5:

			MPG
3 Series Sedan
	RWD	2.0 turbo 4-cyl.	28 city/35 hwy
		3.0 turbo 6-cyl. Hybrid	27 city/33 hwy
	AWD	2.0 turbo 4-cyl.	26 city/34 hwy
		3.0 turbo 6-cyl. Hybrid	26 city/33 hwy
K5
	FWD	GT-Line/EX 2.5 DOHC 4-cyl.	25 city/36 hwy
		2.5 turbo 4-cyl.	23 city/33 hwy
	AWD	2.5 DOHC 4-cyl.	24 city/33 hwy

Regenerative brakes improve the 3 Series Sedan’s fuel efficiency by converting inertia back into energy instead of wasting it. The K5 doesn’t offer a regenerative braking system.

Regardless of its engine, the 3 Series Sedan’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. Kia only offers an automatic engine start/stop system on the K5 LX, and doesn’t offer a disable button.

Brakes and Stopping

For better stopping power the 3 Series Sedan’s brake rotors are larger than those on the K5:

	330i	M340i	K5	K5 GT
Front Rotors	13 inches	13.7 inches	12 inches	13.6 inches
Rear Rotors	13 inches	13.6 inches	11.2 inches	12.8 inches

The 3 Series Sedan’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the K5 are solid, not vented.

The 3 Series Sedan stops much shorter than the K5:

	3 Series Sedan	K5
70 to 0 MPH	151 feet	179 feet	Car and Driver
60 to 0 MPH	103 feet	127 feet	Motor Trend

Tires and Wheels

For better traction, the 3 Series Sedan has larger standard tires than the K5 (225/45R18 vs. 205/65R16).

The 330i’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the K5 LXS’ standard 65 series tires. The 3 Series Sedan’s optional 255/35R19 rear tires have a lower 35 series profile than the K5 GT’s 40 series tires.

For better ride, handling and brake cooling the 330i has standard 18-inch wheels. Smaller 16-inch wheels are standard on the K5 LXS.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 3 Series Sedan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The K5 doesn’t offer run-flat tires.

Suspension and Handling

The 3 Series Sedan offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The K5’s suspension doesn’t offer adjustable shock absorbers.

The 3 Series Sedan’s front to rear weight distribution is more even (52.1% to 47.9%) than the K5’s (60% to 40%). This gives the 3 Series Sedan more stable handling and braking.

The 330i handles at .99 G’s, while the K5 GT pulls only .86 G’s of cornering force in a Car and Driver skidpad test.

The M340i executes Motor Trend’s “Figure Eight” maneuver 1.3 seconds quicker than the K5 GT (25 seconds @ .77 average G’s vs. 26.3 seconds @ .69 average G’s).

Chassis

The 3 Series Sedan is 7.2 inches shorter than the K5, making the 3 Series Sedan easier to handle, maneuver and park in tight spaces.

The front grille of the 3 Series Sedan uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The K5 doesn’t offer active grille shutters.

Cargo Capacity

The 3 Series Sedan has a much larger trunk than the K5 (16.9 vs. 15.6 cubic feet).

To allow full utilization of available cargo room, the 3 Series Sedan’s trunk lid uses concealed beam hinges that don’t intrude into the trunk. Its intrusive beam hinge reduces the K5’s useful trunk space.

Pulling a handle automatically lowers the 3 Series Sedan’s rear seats, to make changing between passengers and cargo easier. The K5 doesn’t offer automatic folding seats.

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the 3 Series offers cargo security. The K5’s non-lockable remote release defeats cargo security.

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the 3 Series Sedan. The K5 doesn’t offer locking storage for small valuables.

To make loading and unloading groceries and cargo easier, especially for short adults, the 3 Series Sedan offers an optional power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The K5 doesn’t offer a power trunk, so its trunk has to be closed manually.

Servicing Ease

The engine in the 3 Series Sedan is mounted longitudinally (North-South), instead of sideways, as in the K5. This makes it easier to service and maintain, because the accessory belts are in front.

Ergonomics

The 3 Series Sedan offers an optional heads-up display that projects speed, warning and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The K5 doesn’t offer a heads-up display.

The 3 Series Sedan’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The K5’s standard passenger windows don’t open or close automatically.

If the windows are left open on the 3 Series Sedan the driver can close them all at the outside door handle. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the K5 can only close the windows from inside the vehicle, with the ignition on.

The 3 Series Sedan’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The K5’s manually variable intermittent wipers have to be constantly adjusted.

To help drivers avoid possible obstacles, the 3 Series Sedan has standard cornering lights to illuminate around corners when the turn signals are activated. The K5 doesn’t offer cornering lights. The 3 Series Sedan also offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

The 3 Series Sedan’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The K5 offers an automatic rear view mirror, but its side mirrors don’t dim.

The BMW 3 Series Sedan has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors are only offered on the K5 EX/GT1.

The 3 Series Sedan has standard heated front seats. Heated front seats are only available on the K5 GT-Line/EX/GT. The 3 Series Sedan also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the K5.

Both the 3 Series Sedan and the K5 offer rear vents. For greater rear passenger comfort, the 3 Series Sedan has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The K5 doesn’t offer rear air conditioning vents, only heat vents.

The BMW 3 Series Sedan has a standard Homelink wireless remote control system for garage door operation and device management, conveniently located on the rear view mirror. Homelink® eliminates the need for separate garage door openers and associated risks of losing, breaking, or having dead batteries. Kia charges extra for Homelink® on the K5.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW 3 Series has a standard wireless phone charging system (Qi) in the center console. Only the K5 GT-Line/EX/GT offers wireless charging.

The 3 Series Sedan’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The K5 doesn’t offer an automated parking system.

Recommendations

Consumer Reports® recommends the BMW 3 Series Sedan, based on reliability, safety and performance.

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