Component
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Manufacturer
Honda (American Honda Motor Co.)
What Happened
The brake master cylinder in your Acura ILX is a critical part that helps control your brakes. It's located near the brake fluid reservoir and is responsible for sending brake pressure to your wheels. Unfortunately, contaminated brake fluid can cause a seal inside the master cylinder to deform.
Risk if Unfixed
If the seal deforms, it can cause a brake fluid leak, reducing your brake function. This means it could take longer to stop when you press the brake pedal, increasing the risk of a crash or injury.
Free Fix
Your Acura dealer will replace the brake master cylinder with a new one at no cost to you. This repair is essential to ensure your safety on the road, and you should schedule it as soon as possible.
Show original NHTSA language
Original — What Happened
Honda (American Honda Motor Co.) is recalling certain 2016-2020 Acura ILX vehicles. Contaminated brake fluid may cause a seal inside the brake master cylinder to deform, which can cause an internal brake fluid leak and reduce brake function.
Original — Risk if Unfixed
Reduced brake function can extend the distance required to stop, increasing the risk of a crash or injury.
Original — Remedy
Dealers will replace the brake master cylinder, free of charge. Owner letters were mailed May 4, 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's number for this recall is RN5. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning December 17, 2025.
The information in your report suggests that Honda (American Honda Motor Co.) may have been aware of this issue more than five business days before filing a report with NHTSA. Please be reminded that under Federal law, this agency is to be notified of all safety defect and/or noncompliance decisions within five business days. 49 CFR 573.6 Significant civil penalties can be assessed for this violation.
View full recall details →
Repairs are free at any authorized dealer. Find a dealer →