Honda (American Honda Motor Co.): Service Brakes, Hydraulic › Foundation Components › Master Cylinder
Honda (American Honda Motor Co.) reported this defect to federal regulators on Dec 11, 2025 and put the number of vehicles at risk at 70,658. The repair is free for as long as the recall stands.
The defect
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.
The risk
Reduced brake function can extend the distance required to stop, increasing the risk of a crash or injury.
The 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.
5 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2020 Acura ILX | 10 | 2 | 0 | 1 |
| 2019 Acura ILX | 36 | 5 | 0 | 2 |
| 2018 Acura ILX | 23 | 4 | 0 | 2 |
| 2017 Acura ILX | 20 | 4 | 0 | 2 |
| 2016 Acura ILX | 52 | 6 | 0 | 4 |
What this page is, and what to do next
A recall is not an opinion. It is a Part 573 report a manufacturer is required by federal law to file once it decides a defect poses an unreasonable risk to safety, and it commits them to repairing the vehicle at no cost to the owner. The three passages above are the manufacturer’s own wording as published by NHTSA.
This page describes the campaign. It cannot tell you whether one particular car has already been through the shop — that is tracked by VIN, and only the manufacturer knows it. Check yours at nhtsa.gov/recalls or with a franchised dealer, quoting campaign number 25V859000.
Full record for the 2020 Acura ILX → · Recalls carrying a do-not-drive advisory → · Where this data comes from →