United States70,658 potentially affected 2016–2020 Acura ILX vehicles are included in this recall; VINs involved will be searchable on NHTSA.gov beginning December 17, 2025 and Honda’s reference for the recall is RN5. Contaminated brake fluid can deform a seal inside the brake master cylinder, which can cause an internal brake fluid leak and reduced brake function, increasing stopping distance. Dealers will replace the brake master cylinder free of charge; owner letters were mailed May 4, 2026 and owners may contact Honda at 1-888-234-2138.
What's being recalled
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.
How to identify it
NHTSA campaign 25V859000; Manufacturer campaign RN5
The hazard
Reduced brake function can extend the distance required to stop, increasing the risk of a crash or injury.
What to do
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.
The official notice
This page is a summary of the notice published by U.S. National Highway Traffic Safety Administration, collected from U.S. National Highway Traffic Safety Administration. Check the original before you act on it.
Read the official notice (opens in a new tab)