MajorCommonElectrical

Toyota Alphard twin: Hybrid NiMH Battery Pack Capacity Degradation

Hybrid NiMH Battery Pack Capacity Degradation is a common electrical fault on the Toyota Alphard twin on the 2011–2015 cars, and we rate it major. Putting it right costs ≈A$3,220 to ≈A$8,280 at independent workshop rates, shown as an approximate guide in Australian dollars. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 13 documented faults on the Toyota Alphard twin.

Vehicle: Toyota Alphard twin
Years: 2011–2015
Fuel: hybrid
Gearbox: cvt
System: Electrical

This page covers the Toyota Alphard twin as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Toyota Alphard twin faults13 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The ZVH20W Vellfire Hybrid shares the same Toyota Hybrid System II (THS-II) with 288V NiMH battery pack as the AHH20 Alphard Hybrid, and exhibits the same age- and cycle-related capacity degradation. Grey-import ZVH20W examples entering Australia are typically 10–14 years old at time of sale, placing most in the high-risk degradation window. DTC P0A80 is the confirmed trigger code for pack replacement. Left unaddressed, the vehicle defaults to petrol-only operation with reduced performance and significantly higher running costs.

What you would notice

EV mode absent or very brief at low speeds
Hybrid triangle warning on instrument cluster
Fuel consumption well above hybrid rating
Battery charge indicator sitting at extremes (full or empty) without change

How to check it

Where to look. Under rear load floor / below second-row seating

Use Toyota Techstream to read HV battery state-of-health and check for P0A80 or ancillary battery codes such as P0A7F and P3000. During a 15-minute test drive at suburban speeds, confirm the EV indicator activates on a light throttle between 20–50 km/h. Listen for the battery cooling fan — a blocked or failed fan accelerates cell degradation. Ask for any service records referencing hybrid battery work.

What it costs to put right

≈A$3,220 to ≈A$8,280 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the hybrid battery been health-checked by a Toyota technician?”
“Has the triangle hybrid warning light appeared at any time?”
“What fuel economy does the vehicle achieve in your typical driving?”

Now check the Toyota Alphard twin you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car still has money owing on it, has been written off or reported stolen, what kms it showed in past sale ads, whether it has had accident repair claims and what it is worth today. That comes from the official records for that plate. Enter the plate and its state for the A$17.90 Vehicle Check, or the full history from A$24.99.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Toyota Alphard twin buyer questions

Is hybrid nimh battery pack capacity degradation serious on a Toyota Alphard twin?

We rate it major and common on the Toyota Alphard twin. The ZVH20W Vellfire Hybrid shares the same Toyota Hybrid System II (THS-II) with 288V NiMH battery pack as the AHH20 Alphard Hybrid, and exhibits the same age- and cycle-related capacity degradation. Grey-import ZVH20W examples entering Australia are typically 10–14 years old at time of sale, placing most in the high-risk degradation window. DTC P0A80 is the confirmed trigger code for pack replacement. Left unaddressed, the vehicle defaults to petrol-only operation with reduced performance and significantly higher running costs.

How much does it cost to fix on a Toyota Alphard twin?

≈A$3,220 to ≈A$8,280 at independent workshop rates, shown as an approximate guide in Australian dollars. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Toyota Alphard twin years are affected?

Our research records this fault on the 2011–2015 Toyota Alphard twin. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.