Hyundai/Kia Smartstream 2.5 NA (G4KM)
CAUTION Modern

Smartstream 2.5 NA (G4KM)

Hyundai/Kia · 2.5L NA I4

2019–present

0 / 100
CAUTION

"Theta III. Oil consumption concerns + piston ring issues reported. Early recall in Korea. Watch carefully."

Layout I4
Displacement 2497 cc
Power 191–194 hp
Type Petrol Na
Known Issues 1
Total Risk Cost €0–€2,000

Mileage Risk Timeline

When problems typically appear — enter your mileage to see your risk zone

km

Known Issues 1

● MODERATE

Oil consumption concern (some units)

€0–€2,000 40,000 km–100,000 km
View details ▸
Detection

Oil level drops, slight blue tint to exhaust

Details

Some Smartstream G4FJ units show oil consumption. Theta II heritage caused scrutiny. Most fine.

Greece Note

Check oil consumption on test drive. If consuming: potential warranty claim or budget €1,500-2,000 for fix.

Models with Smartstream 2.5 NA (G4KM) 3

Kia Stinger 2.0 T-GDi
2019–2023 G4KL 255 hp petrol
Hyundai Santa Fe 2.5 GDI
2020–2024 SUV Large SUV
Hyundai i30 N 2.0 T-GDI
2019–2024 Hatchback Compact

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Other Hyundai/Kia Engines

BUY 82

Gamma 1.6 MPI (G4FC)

1.6L NA I4

View details → Compare: Smartstream 2.5 NA (G4KM) vs Gamma 1.6 MPI (G4FC)
BUY 80

Gamma 1.4 MPI (G4FA)

1.4L NA I4

View details → Compare: Smartstream 2.5 NA (G4KM) vs Gamma 1.4 MPI (G4FA)
BUY 80

U/U2 1.6 CRDi (D4FB)

1.6L Diesel I4

View details → Compare: Smartstream 2.5 NA (G4KM) vs U/U2 1.6 CRDi (D4FB)
ACCEPTABLE 75

G6DH 3.5 V6

G6DH 3.5 V6 Lambda III

View details → Compare: Smartstream 2.5 NA (G4KM) vs G6DH 3.5 V6
ACCEPTABLE 75

Smartstream 1.6T (G4FP)

1.6L Turbo I4

View details → Compare: Smartstream 2.5 NA (G4KM) vs Smartstream 1.6T (G4FP)
ACCEPTABLE 74

Smartstream 1.6 CRDi (D4FE)

1.6L Diesel I4

View details → Compare: Smartstream 2.5 NA (G4KM) vs Smartstream 1.6 CRDi (D4FE)

Tuning Potential

N/A

Frequently Asked Questions

Is the Hyundai/Kia Smartstream 2.5 NA (G4KM) reliable?

The Hyundai/Kia Smartstream 2.5 NA (G4KM) scores 60/100 with a verdict of CAUTION. It has 1 documented issues with total repair costs between €0 and €2,000.

What are the common problems with the Smartstream 2.5 NA (G4KM)?

The most common issues are:

  • Oil consumption concern (some units) — moderate, repair cost €0–€2,000, 40,000 km–100,000 km
What cars use the Hyundai/Kia Smartstream 2.5 NA (G4KM)?

The Smartstream 2.5 NA (G4KM) is found in:

How much does it cost to repair the Smartstream 2.5 NA (G4KM)?

Total potential repair costs for all 1 known issues range from €0 to €2,000. The most expensive issue is typically .

What years was the Smartstream 2.5 NA (G4KM) produced?

The Hyundai/Kia Smartstream 2.5 NA (G4KM) was produced from 2019 to present. It is a 2497cc I4 petrol na engine.

Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.

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