Toyota Aqua and Prius C NHP10 buying guide

2011 to 2021. An Aqua suits a buyer who wants a cheap, frugal town car and will check the hybrid battery and recall history first.

Big jobs

Hybrid battery capacity. Hybrid battery cells weaken with age, and a NZ workshop guide puts the usual life at about 8 to 12 years. A weak pack shows as charge that falls and refills very quickly.

Steering intermediate shaft. Wear in the steering intermediate shaft is reported and shows up as a clunk or notch in the steering.
Water leaks into the boot and tail lights. Water getting in through roof seams or tail light seals is a known weak spot, and moisture inside the tail light lenses is common on older cars.
Electric air conditioning compressor. The air conditioning uses an electric compressor. A high pitched whine is normal, but grinding or weak cooling can mean trouble.

Hybrid battery cooling intake. The intake that cools the hybrid battery can clog with dust and pet hair, which lets the battery run hot and age faster.
Brake booster pump recall. A 2018 Toyota recall covers the brake booster pump and accumulator, and a failing pump makes a barking or clicking noise.
Immobiliser on base models. Some key start base model Japanese imports from 2012 to 2016 may have no factory immobiliser, and NZ insurers can ask for an approved alarm and immobiliser.

Has the hybrid battery ever been replaced or reconditioned, and is there a battery health report?
Has the 2018 brake booster pump recall been done?
Does it have push button start and a factory immobiliser?
Has the boot floor or spare wheel well ever been wet?
Does it come with 2 keys?

Researched 2026-11-04. General guidance from owner and specialist sources. Check the specific car with an independent inspection.