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2018 Kia Sorento · 3rd Gen Refresh (2016-2020)

2018 Kia Sorento Problems: What Owners Actually Report

The 2018 Sorento with the 2.4L GDI Theta II engine is part of the well-known engine seizure class action and KSDS knock sensor program. The Lambda 3.3L V6 is more reliable but can consume oil. Many recalls and extended warranties make verification critical.

Reliability: 3.2/5 Caution: Theta II Engine
⚠️ Theta II Engine Class Action

In re Hyundai/Kia Engine Litigation settled covering 2.4L Theta II GDI engines. Kia extended warranty to 10 years / 120,000 miles and installed Knock Sensor Detection System (KSDS) software to alert on bearing failure.

🔧 Top 6 2018 Kia Sorento Problems Owners Report

22%
#1 · Severe
2.4L Theta II GDI Engine Failure
60K-120K mi · $0 (KSDS warranty) - $7,500

Bearing failure leads to rod knock and seizure. KSDS software detects early; under class action, eligible owners get engine replacement under 10yr/120K extended warranty.

Misfire Diagnosis →
15%
#2 · Moderate
3.3L Lambda V6 Oil Consumption
60K-110K mi · $0 (top up) - $3,500

Some 3.3L V6 engines burn oil. Kia oil consumption test may qualify ring replacement under powertrain warranty.

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14%
#3 · Moderate
6-Speed Transmission Harshness
30K-70K mi · $0 (TSB) - $2,500

A6MF1/A6MF2 transmissions show harsh 1-2 shifts and torque converter shudder. Kia TSBs update TCM and replace fluid.

P0700 Diagnosis →
15%
#4 · Minor
UVO Infotainment Crashes
Any mileage · $0

UVO head unit reboots or fails to wake. Hold reset button or remove fuse for 30 seconds. Firmware updates at dealer.

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10%
#5 · Moderate
Brake Booster Recall
Any mileage · $0 (recall)

NHTSA 22V-679 covers ABS module brake fluid leak fire risk on 2014-2018 Sorento. Free repair at Kia dealer.

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7%
#6 · Minor
Hood Latch Failure
Any mileage · $0 (recall)

NHTSA 19V-115 covers secondary hood latch corrosion that can allow hood to open. Free replacement at dealer.

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⚠️ Recalls, TSBs & Class Actions on the 2018 Kia Sorento

Recall · NHTSA 22V-679
ABS Module Fire Risk

ABS module may leak brake fluid causing electrical short and fire. Affects 2014-2018 Sorento. Free repair.

Recall · NHTSA 19V-115
Secondary Hood Latch

Secondary hood latch may corrode and allow hood to open while driving. Free replacement.

Class Action · In re Hyundai/Kia Engine Litigation
Theta II Engine Settlement

Extended warranty to 10 years / 120,000 miles, KSDS software install, and engine replacement coverage on 2.4L GDI Theta II engines.

🔍 Common OBD2 DTCs on the 2018 Kia Sorento

If your Sorento is throwing a check engine light, these are the codes most commonly tied to the problems above. Click any code for full diagnosis steps and typical repair costs.

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💬 Frequently Asked Questions About the 2018 Kia Sorento

Is the 2018 Kia Sorento reliable?

Mixed. The 2.4L Theta II engine has well-documented bearing failures but is covered by an extended warranty (10yr/120K). The 3.3L V6 is more reliable.

What is the 2018 Sorento engine problem?

Theta II 2.4L GDI engines suffer rod bearing failure. Class action extended warranty to 10yr/120K, and Kia installed KSDS to detect impending failure.

Should I buy a 2018 Sorento with the 2.4L?

Only if the KSDS update has been applied and the engine shows no knock. Better to get the 3.3L V6 for fewer engine concerns.

Does the 2018 Sorento have a fire recall?

Yes. NHTSA 22V-679 covers ABS module brake fluid leak fire risk. Verify completion.

How long will a 2018 Sorento last?

With the 3.3L V6 and routine maintenance, 200K is realistic. With the 2.4L, dependent on Theta II warranty coverage.

Are there recalls on the 2018 Sorento?

Yes, including ABS fire risk (22V-679), hood latch (19V-115), and KSDS engine program. Always verify completion.

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