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.
NHTSA's own wording · initiated by ODI
Vehicles covered
| Model | Model years |
|---|---|
| Acura ILX | 2016, 2017, 2018, 2019, 2020 |
Components: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Acura ILX | 2016 | 52 | 6 |
| Acura ILX | 2017 | 20 | 4 |
| Acura ILX | 2018 | 23 | 4 |
| Acura ILX | 2019 | 36 | 5 |
| Acura ILX | 2020 | 10 | 2 |
Other service brakes, hydraulic recalls in 2025
37 of the 891 recall campaigns reported to NHTSA in 2025 concerned the service brakes, hydraulic; Honda (American Honda Motor Co.) filed 245 campaigns in all.
| 25V873000 17 Dec 2025 | Suzuki Motor USA, LLC |
| 25V846000 9 Dec 2025 | Chrysler (FCA US, LLC) |
| 25V823000 1 Dec 2025 | Ford Motor Company |
| 25V768000 6 Nov 2025 | General Motors, LLC |
| 25V693000 10 Oct 2025 | Ford Motor Company |
| 25V564000 29 Aug 2025 | Tuff Trailer USA Inc. |
| 25V550000 26 Aug 2025 | Forest River, Inc. |
| 25V544000 22 Aug 2025 | Ford Motor Company |
NHTSA recalls (public domain) · all recalls of 2025