Electric Power Assist System (EPAS) Failure

Multiple recalls address EPAS failures, which can lead to a loss of steering assist. This is a critical safety concern requiring immediate attention if symptoms arise or recalls are outstanding. Estimated repair cost: $1,000 - $2,000.

Powertrain Vibration / Rough Shifting

Some owners report rough transmission shifting and engine vibration, particularly between 50-60 mph. This may indicate underlying issues with the transmission or engine mounts. Estimated repair cost: $500 - $1,500.

Electrical System Faults (CUE Display)

Complaints include defects with the CUE (Cadillac User Experience) display panel, leading to functional issues with the infotainment system. Estimated repair cost: $300 - $1,000.

Exterior Lighting Issues

Some owners have noted issues with exterior lighting, such as overly bright daytime running lights or headlights causing glare. Estimated repair cost: $100 - $500.

CARFOCALvehicle research

2018 Cadillac CTS Maintenance guide

Name: Maintenance dataset for 2018 Cadillac CTS
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed3 Critical Recalls

MAINTENANCE SUMMARY

The 2018 Cadillac CTS requires diligent attention to its powertrain and electrical systems, with a 'Below Average' reliability verdict. Key concerns include potential rear differential failure and steering system issues related to EPAS recalls.

View Critical Issue: Rear Differential Failure

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Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

431 TSBs | 3 Recalls

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Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

Prioritize addressing EPAS recalls for steering safety.
Be aware of potential rear differential failures and associated parts delays.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance

2018 Cadillac CTS Maintenance guide

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed3 Critical Recalls

MAINTENANCE SUMMARY

View Critical Issue: Rear Differential Failure

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

431 TSBs | 3 Recalls

CarFocal account required

Unlock the Full 2018 Cadillac CTS Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

Prioritize addressing EPAS recalls for steering safety.
Be aware of potential rear differential failures and associated parts delays.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance