NHTSA Campaign Number
25V859000
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Reported to NHTSA: November 12, 2025
Defect Description
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.
Safety Consequence
Reduced brake function can extend the distance required to stop, increasing the risk of a crash or injury.
Remedy
Dealers will replace the brake master cylinder, free of charge. Interim letters notifying owners of the safety risk were mailed February 3, 2026. Additional letters will be sent once the final remedy is available, anticipated May 1, 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.
What This Recall Page Shows
This page summarizes a single NHTSA recall campaign, including the defect description, safety consequence, and manufacturer's remedy. The affected vehicles listed below are the make/model/year combinations tracked in our database — this is not a VIN-specific result. To check whether your individual vehicle is covered by this recall, enter your 17-digit VIN at nhtsa.gov/recalls. Click any vehicle below to view its full safety profile.
Affected Vehicles (5)
Browse Affected Vehicles
This recall information is from NHTSA campaign 25V859000. This site is not affiliated with NHTSA. Contact your dealer or call NHTSA's Vehicle Safety Hotline at 1-888-327-4236 for more information.