Electrical System Failures (Backup Camera, Shift-to-Park)

Complaints indicate issues with the backup camera system, including disappearing grid lines and system malfunction. The 'shift to park' warning message is also a recurring problem, often requiring replacement of the transmission shift control assembly. These electrical faults can lead to inconvenience and potential battery drain. Estimated repair cost: $300 - $800.

Engine Oil Leaks (Rear Differential Pinion Seal)

A specific complaint noted a leaking rear differential pinion seal at approximately 27,000 miles. This can lead to fluid loss and potential damage to the differential if not addressed promptly. Regular inspections are crucial. Estimated repair cost: $400 - $700.

Auxiliary Coolant Pump Noise

Some owners report an audible noise from the auxiliary coolant pump, often associated with the auto start/stop system. While not always a critical failure, it can be an annoyance and may indicate component wear. Estimated repair cost: $300 - $600.

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2018 Buick Regal TourX Maintenance guide

Name: Maintenance dataset for 2018 Buick Regal TourX
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed

MAINTENANCE SUMMARY

The 2018 Buick Regal TourX, with an average reliability verdict, presents potential ownership concerns primarily around its electrical system and engine. Owners should prioritize inspections related to the backup camera and the 'shift to park' function, as well as monitor for engine-related issues.

View Critical Issue: Brake System Concerns

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

40 TSBs | 0 Recalls

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Key Takeaways

Focus on electrical system health, particularly the backup camera and 'shift to park' function.
Monitor for engine-related issues and potential fluid leaks.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance