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2016-2020 Acura ILX recall: Reduced Brake Function

Report received by NHTSA: Dec. 11, 2025.

Built by the Tribune's code from NHTSA's official records. No AI wrote this page. Updated Nov. 6, 2026.

What's 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.

The risk

Reduced brake function can extend the distance required to stop, increasing the risk of a crash or injury.

Who's affected

70,658 vehicles potentially affected, according to NHTSA. Models: 2016-2020 Acura ILX.

Compared with

Honda (American Honda Motor Co.) has 14 NHTSA recalls in 2026 so far, compared with 24 in all of 2025.

Counted by the Tribune from NHTSA's records since Nov. 1, 2016.

What to do and when

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 record, word for word

Check it yourself

NHTSA's VIN lookup shows whether a specific vehicle has an open recall.

NHTSA recall number25V859000
ManufacturerHonda (American Honda Motor Co.)
Recall typeVehicle
ComponentSERVICE BRAKES, HYDRAULIC
Report received by NHTSADec. 11, 2025
Potentially affected70,658 vehicles
Manufacturer's recall numberRN5
“Do not drive” warningNo
Fire risk when parked (“park outside”)No

Source: National Highway Traffic Safety Administration recall records (public domain). NHTSA's record