Foundation components: master cylinderRecall 25V-859 · 2016–2020 Acura ILX
Honda (American Honda Motor Co.) recall 25V-859 covers 70,658 2016–2020 Acura ILX for a foundation components: master cylinder problem, reported to NHTSA on December 11, 2025. The manufacturer's latest report (2026 Q3) shows 34% of affected vehicles repaired.
Source: NHTSA recall 25V859000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.
The problem
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 fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
34%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA. 2,052 vehicles were listed as unreachable.
The investigation behind this recall
- Loss of braking forceNHTSA