Is the KIA K5 more reliable than the Buick Regal?

No clear winner emerges. Both have a good reliability standing and the comparison is effectively tied. The K5 has more total complaints, but it sold more cars, and its rate per 10,000 sold is lower. The Regal has fewer reported problem areas, though some involve brakes and crashes.

Which has more recalls, the K5 or the Regal?

The K5 has more. Federal recall records show 20 recalls across its 6 model years, against 8 across the Regal's 3 model years. The K5 has been on sale longer and across more model years, which gives recalls more time to accumulate.

Which car costs less to repair?

The page cannot say for certain. Independent repair-cost data exists only for the Regal, which averages about $563 a year, 0.2 unscheduled shop visits a year, and a 12% chance that a repair is major. No matching figures are available for the K5, so no comparison is possible.

What is the biggest problem with the KIA K5?

Owners report several serious ones. Electrical outages top the list, with headlights and the instrument cluster shutting off while driving. The fuel tank can also swell, sometimes with a loud bang, and the car may stall at highway speed. Some cars sit undrivable for weeks, and a few owners were offered buybacks.

Does the Buick Regal have brake problems?

Some owners report them. Five complaints describe a brake pedal that turns hard or braking that fades suddenly, and two of the five involve crashes. The pool is small, but a firm pedal or a car that will not slow is worth testing for before you buy.

Last updated: 2026-10-10

Buick Regal vs Kia K5: Reliability Compared

Buick Regal

Good

More Reliable

Kia K5

Good

The KIA K5 and Buick Regal are effectively tied on reliability. Fault type separates them: K5 fuel tank and lighting trouble, Regal brake trouble. The K5 logs more complaints and recalls in raw counts, but the Regal's complaint rate per 10,000 sold is higher.

How Do the Buick Regal and Kia K5 Generations Compare?

Shoppers face two very different situations. The K5 is a fifth-generation car that began with the 2021 model year, and a first facelift arrived in 2025, so you will see both pre-facelift and facelifted cars. The 2021 and 2022 cars are the weakest, and the facelift years are too new to have a full complaint record. The Regal belongs to the sixth generation, and 2020 was its final production year. Every Regal for sale is therefore used and at least a few years old, and 2020 is the strongest of the three years.

Buick Regal vs Kia K5: Which Is More Reliable?

Buick Regal vs Kia K5 at-a-glance reliability comparison
Metric	Buick Regal	Kia K5
Reliability Score	74/100	75/100
Years Tracked	3	6
Total Recalls	8	20
Complaints per 10k Sold	14.5	10.2

What Are the Common Problems With the Buick Regal and Kia K5?

Electrical faults lead both lists, but they look different. K5 owners report headlights, the instrument cluster, and the radio cutting out while driving, and a fuel tank that swells with a loud bang and lifts the back seat. Regal owners describe stop-start restarts that lag at red lights and a false "Shift to Park" message that drains the battery. Crash-linked areas differ too. The Regal has crash reports in service brakes, where the pedal turned hard or the car would not slow. The K5's crash-linked reports sit in the power train, structure, and air bags.

Buick Regal vs Kia K5 common problem areas comparison
Component	Buick Regal	Kia K5
ELECTRICAL SYSTEM	2.6Low	1.7Low
POWER TRAIN	1.5Low	1.2Low
UNKNOWN OR OTHER	1.5Low	0.9Very Low
SERVICE BRAKES	1.9Low	0.1Very Low
FUEL/PROPULSION SYSTEM	—None	1.2Low
STRUCTURE	—None	0.8Very Low
VEHICLE SPEED CONTROL	0.7Very Low	0.1Very Low
SUSPENSION	0.7Very Low	—None
AIR BAGS	—None	0.6Very Low
ENGINE	—None	0.6Very Low
FUEL SYSTEM	—None	0.6Very Low
STEERING	—None	0.4Very Low
SEATS	—None	0.2Very Low
TIRES	—None	0.1Very Low
VISIBILITY/WIPER	—None	0.1Very Low
WHEELS	—None	0.1Very Low
FORWARD COLLISION AVOIDANCE	—None	0.1Very Low
LANE DEPARTURE	—None	0.1Very Low

Complaints per 10,000 units sold, aggregated across all tracked model years from NHTSA owner reports.

Who Should Buy the Buick Regal vs the Kia K5?

Pick the K5 if you want a newer car and can accept a longer list of known faults. Skip 2021 and 2022, the weakest years. The 2025 and 2026 cars look strongest, but they have had less time to collect complaints, so read that as a thin record and not as proof. Whichever year you shop, ask the seller whether the fuel tank recall work was done, and check that every light and the instrument cluster stay on during a long test drive. Pick the Regal if you want fewer reported problem types and a car with a settled record. Production ended after 2020, so every Regal is used. Target 2020 and avoid 2019. Because brake complaints include crashes, press the pedal hard and test it in reverse, and ask about open recalls. Also shift into park several times and confirm the "Shift to Park" message stays off and the car shuts down fully.

Buick Regal vs Kia K5: Common Questions

Is the KIA K5 more reliable than the Buick Regal?: No clear winner emerges. Both have a good reliability standing and the comparison is effectively tied. The K5 has more total complaints, but it sold more cars, and its rate per 10,000 sold is lower. The Regal has fewer reported problem areas, though some involve brakes and crashes.
Which has more recalls, the K5 or the Regal?: The K5 has more. Federal recall records show 20 recalls across its 6 model years, against 8 across the Regal's 3 model years. The K5 has been on sale longer and across more model years, which gives recalls more time to accumulate.
Which car costs less to repair?: The page cannot say for certain. Independent repair-cost data exists only for the Regal, which averages about $563 a year, 0.2 unscheduled shop visits a year, and a 12% chance that a repair is major. No matching figures are available for the K5, so no comparison is possible.
What is the biggest problem with the KIA K5?: Owners report several serious ones. Electrical outages top the list, with headlights and the instrument cluster shutting off while driving. The fuel tank can also swell, sometimes with a loud bang, and the car may stall at highway speed. Some cars sit undrivable for weeks, and a few owners were offered buybacks.
Does the Buick Regal have brake problems?: Some owners report them. Five complaints describe a brake pedal that turns hard or braking that fades suddenly, and two of the five involve crashes. The pool is small, but a firm pedal or a car that will not slow is worth testing for before you buy.

More Buick Regal comparisons

Buick Regal vs Toyota Camry reliability Buick Regal vs Honda Accord reliability Buick Regal vs Hyundai Sonata reliability Buick Regal vs Nissan Altima reliability Buick Regal reliability by year Buick Regal years to avoid

More Kia K5 comparisons

Kia K5 vs Toyota Camry reliability Kia K5 vs Nissan Altima reliability Kia K5 vs Hyundai Sonata reliability Kia K5 vs Ford Fusion reliability Kia K5 reliability by year Kia K5 years to avoid

Decided between Buick Regal and Kia K5? Run a VIN check before you buy — uncover hidden accidents, title issues, and open recalls.

Look Up a VIN →

How we score the Buick Regal and Kia K5

Scores weight complaint severity at 35%, repair costs at 30%, recall impact at 20%, and the spread of complaints across systems at 15%, with complaint counts adjusted for US sales. Read the full methodology.

See incorrect data? Report an issue