Complaints include spongy brake pedals, reduced braking performance, and issues related to the rear brake caliper pistons. Regular inspection and fluid flushes are crucial. Estimated repair cost: $200 - $800.

Powertrain Malfunctions

Issues related to the powertrain, including transmission shifting problems and engine performance concerns, are noted. Regular fluid changes and inspections are key. Estimated repair cost: $500 - $3,000+.

AC System Component Failures

Recurring failures of AC components, particularly the evaporator core, can lead to reduced cooling efficiency and potential water leaks. Regular system checks are advised. Estimated repair cost: $500 - $1,200.

CARFOCALvehicle research

2018 Chevrolet Impala Maintenance guide

Name: Maintenance dataset for 2018 Chevrolet Impala
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2018 Chevrolet Impala requires diligent maintenance, with a notable emphasis on its electrical system and brakes due to frequent complaints. Owners should prioritize regular inspections of these critical areas.

View Critical Issue: Electrical System Failures

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Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

351 TSBs | 1 Recalls

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Key Takeaways

Prioritize maintenance of the electrical system and brakes due to frequent complaints.
The 2018 Impala has a 'Below Average' reliability verdict.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance