Mercury Mariner acceleration difficulty due to left front caliper sticking and clogged brake line on Mercury Mariner

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercury Mariner owners report experiencing acceleration difficulties due to a sticking left front caliper and clogged brake lines. These issues can lead to excessive friction and heat buildup, as a stuck brake caliper prevents the brake pads from fully disengaging from the rotors. Common causes of caliper sticking include problems with caliper slides and bolts, which can ultimately damage components like pads, rotors, and calipers. Additionally, a clogged brake line can impede brake fluid flow, resulting in symptoms such as spongy brakes, reduced braking power, or a soft brake pedal. It is crucial for owners to address these issues promptly to maintain effective braking performance and ensure safe driving conditions. Regular inspection and maintenance, including cleaning or replacing the caliper and flushing the brake fluid system, are recommended to resolve these concerns effectively. Consulting a professional mechanic for a thorough inspection and repair is advisable to maintain the vehicle's safety and performance.

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