If the engine rattles violently for 10 seconds when first started, the head gasket is likely failing. Pro Tip: Budget for "Day One" Maintenance
Listen for a frequent "barking" or buzzing sound from under the hood when the car is off or the door opens. If the pump runs every few seconds, the actuator is failing—a $2,000+ repair. buying a used prius with over 100 000 miles
On 2010–2015 models, the Exhaust Gas Recirculation (EGR) valve and cooler clog with soot, which can eventually lead to a blown head gasket. If the engine rattles violently for 10 seconds
Even if the car looks perfect, set aside in your head. This covers a potential battery cell replacement, a fresh set of low-rolling-resistance tires, and a thorough cleaning of the hybrid cooling system. On 2010–2015 models, the Exhaust Gas Recirculation (EGR)
Generation 3 models (2010–2015) are known for burning oil once they cross 100k miles. Check the dipstick; if it’s bone dry, the previous owner may have caused engine damage. 2. Service History Milestones