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
At 100k miles, a Prius needs more than just oil changes. Verify if the following have been done: buying a used prius with over 100 000 miles
This is the elephant in the room. If it hasn't been replaced, it’s likely nearing the end of its life (usually 12–15 years or 150k miles). Ask for a battery health test or use a Bluetooth OBDII scanner with the "Dr. Prius" app to check the blade voltages yourself. Generation 3 models (2010–2015) are known for burning
On 2010–2015 models, the Exhaust Gas Recirculation (EGR) valve and cooler clog with soot, which can eventually lead to a blown head gasket. Service History Milestones At 100k miles, a Prius
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.
If the engine rattles violently for 10 seconds when first started, the head gasket is likely failing. Pro Tip: Budget for "Day One" Maintenance
Check the vent next to the rear seat. If it’s clogged with pet hair or dust, the battery has been running hot, shortening its lifespan. 3. The "Generation" Cheat Sheet