2010–2010 Toyota Prius: Brakes feel inconsistent over bumps (ABS software recall)
Likely causes, ranked
- ABS control software (reflashed free under recall)$0–$0Shop
Real-owner fix counts will appear here as reports come in.
DIY or shop: See DIY or shop section
Parts to check
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Symptom: When braking gently over a bump or slick spot, the brakes briefly feel like they let go.
Likely causes
- ABS software. The recall reflashes the ABS ECU. PriusChat owners mostly report improvement afterward.
DIY or shop?
Dealer only.
Useful steps
- Check your VIN for 10V039.
Vehicle focus: 2010–2010 Toyota Prius.
Safety / mechanic note
Longer stopping distances are a safety risk. Verify with a dealer.
Recalls & service bulletins
Recalls
- 10V039000 2010 Prius and HS250h: brake feel can be inconsistent when ABS activates on rough or slick roads, increasing stopping distance. ABS software update. Details
NHTSA complaints: 1,011 brake-component complaints mention brakes or ABS together with bumps, potholes, rough, uneven, slick or icy roads, or a momentary loss of braking (of 2,819 unique complaints filed under NHTSA model name PRIUS, 2010; NHTSA complaints API, queried 2026-10-15).
Always check your VIN for open recalls at nhtsa.gov/recalls.
Sources
What actually fixed it?
Had this problem? Tell other owners what the real fix was. Reports are counted above; we never show made-up numbers.