2018 Jeep Grand Cherokee

2018 Jeep Grand Cherokee

Overview

The 2018 Jeep Grand Cherokee is a popular mid-size SUV known for its off-road capabilities and comfortable ride. Reliability for this model year is generally considered average, with some specific areas requiring attention. While many owners report a positive ownership experience, certain powertrain components and electrical systems have shown a propensity for issues. Understanding these potential weak points can help prospective buyers and current owners manage maintenance and repair costs effectively. This analysis focuses on documented, non-wear-and-tear related problems across key vehicle systems.

---

Engine

3.6L Pentastar V6

Oil Cooler Leaks

• Symptoms: Oil in coolant reservoir, coolant loss, overheating.
• Solution: Replacement of the oil cooler assembly.
• Cost: $300 - $600

Intake Manifold Leaks

• Symptoms: Vacuum leaks, rough idle, check engine light.
• Solution: Replacement of the intake manifold.
• Cost: $400 - $700

5.7L HEMI V8

Cylinder Deactivation (MDS) Issues

• Symptoms: Rough idle, misfires, potential for valve spring damage.
• Solution: Disabling MDS system or replacing faulty components.
• Cost: $500 - $1500

6.4L HEMI V8

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

3.0L EcoDiesel V6

Diesel Particulate Filter (DPF) Issues

• Symptoms: Reduced engine power, check engine light, regeneration failures.
• Solution: DPF cleaning or replacement, software updates.
• Cost: $1000 - $3000

EGR System Problems

• Symptoms: Rough idle, black smoke, check engine light.
• Solution: Cleaning or replacement of EGR valve and cooler.
• Cost: $500 - $1200

Transmission

8-Speed Automatic (845RE/8HP70)

Harsh Shifting / Jerking

• Symptoms: Rough gear changes, hesitation, clunking sounds.
• Solution: Transmission fluid flush and filter replacement, software update, or internal component repair.
• Cost: $300 - $1000

Torque Converter Issues

• Symptoms: Shuddering at low speeds, slipping, transmission warning light.
• Solution: Torque converter replacement.
• Cost: $800 - $1500

Suspension

Standard Suspension

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Air Suspension (Quadra-Lift)

Air Spring Leaks

• Symptoms: Vehicle sagging on one corner, compressor running excessively, suspension warning light.
• Solution: Replacement of leaking air springs or air lines.
• Cost: $500 - $1000 per corner

Compressor Failure

• Symptoms: Inability to raise or lower the vehicle, constant compressor noise.
• Solution: Replacement of the air suspension compressor.
• Cost: $600 - $1000

Electrical

General Electrical System

Uconnect System Glitches

• Symptoms: Screen freezing, unresponsiveness, Bluetooth connectivity issues.
• Solution: Software updates, system reset, or head unit replacement.
• Cost: $100 - $800

Battery Drain

• Symptoms: Dead battery after short periods of inactivity, electrical components malfunctioning.
• Solution: Diagnosis of parasitic draw, replacement of faulty modules or battery.
• Cost: $200 - $600

Exterior

Body and Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Lighting

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Interior

Cabin Electronics

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Seating and Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

---

Summary Verdict

The 2018 Jeep Grand Cherokee offers a compelling package, but potential buyers should be aware of specific reliability concerns. The V6 and V8 gasoline engines are generally robust, though minor leaks can occur. The 3.0L EcoDiesel, while powerful, is more prone to emissions system issues like DPF and EGR problems, which can be costly to repair. Transmission issues, particularly with the 8-speed automatic, can manifest as harsh shifting or torque converter problems. The air suspension system, if equipped, is a notable area for potential leaks and compressor failures. Electrical gremlins, such as Uconnect glitches and battery drain, are also reported. Overall, the Grand Cherokee is a capable SUV, but diligent maintenance and awareness of these common issues are recommended for long-term satisfaction.