Technical Service Bulletins

Toyota Prius Leaks Brake Fluid

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A small internal brake fluid leak inside the brake booster assembly may be causing warning lights to illuminate on some 2011-2015 Toyota Prius and 2012-2015 Prius Plug-in Hybrid vehicles.

Some 2011-2015 Toyota Prius and 2012-2015 Prius Plug-in Hybrid vehicles may exhibit a condition where the brake, ABS and/or TRAC warning lights are illuminated and/or a Check VSC message displays. 

DTCs C1391, C1252, C1256 and C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly. If any of these DTCs are stored, remove and replace the brake booster assembly with master cylinder. Note that replacement booster/master assemblies are enhanced versions that feature a different part number than original.

MODEL YEAR PRIUS
PREVIOUS 
NEW
201147050-4714
04008-11147

47050-47150
04008-11247
2012-201347050-47180
04008-11347

47050-47190
04008-11447
2014-201547050-47310
04008-11547

47050-47320
04008-11647


MODEL YEAR PRIUS PHV
PREVIOUS 
NEW
2012-201347050-47210
04008-11747
2014-201547050-47340
04008-11847


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