Keep tabs on your brake hydraulics with the Standard Ignition Brake Fluid Level Sensor FLS-166, a direct-fit replacement for the 2006-2011 Hyundai Accent and the 2008-2012 Hyundai Elantra. This sensor monitors the brake fluid level in the master cylinder reservoir and signals the vehicle when the fluid drops below the set point, so the brake warning lamp can alert you to a low-fluid condition.
Signs the original sensor may need replacing include a brake warning light that stays lit with the reservoir properly filled, or a light that never illuminates when the fluid is genuinely low. Diagnose the cause before replacing, since wiring, connectors, or an actual low-fluid condition can produce the same symptoms.
Interchange: FF3336 · SU9159 · FLS740 · 5351G000 · 585351G000 · Manufacturer part number FLS-166 (also FLS166).
This part cross-references / interchanges with the following part numbers:
What does this brake fluid level sensor do?
It monitors the brake fluid level in the master cylinder reservoir and signals the vehicle's warning circuit when the fluid drops below the set point.
Which vehicles does the FLS-166 fit?
It is a direct-fit replacement for the 2006-2011 Hyundai Accent and the 2008-2012 Hyundai Elantra. Confirm fitment for your vehicle in the Buyer's Guide tab.
My brake warning light stays on — will this fix it?
If a faulty level sensor is the cause, replacing it can resolve it. But check the actual fluid level, wiring, and connectors first, since those can trigger the same light.
What numbers does this sensor interchange with?
It cross-references FF3336, SU9159, FLS740, 5351G000, and 585351G000. Its own manufacturer part number is FLS-166.
What are signs this sensor may need replacing?
A brake warning light that stays lit when the reservoir is properly filled, or a light that never illuminates when the fluid is genuinely low.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
