MajorCommonElectrical

Toyota Crown: Hybrid battery degradation (GWS204 / AWS210 Crown Hybrid)

Hybrid battery degradation (GWS204 / AWS210 Crown Hybrid) is a common electrical fault on the Toyota Crown on the 2008–2018 cars, and we rate it major. Putting it right costs $2,000 to $4,500 at New Zealand independent workshop rates. 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 24 documented faults on the Toyota Crown.

Vehicle: Toyota Crown
Years: 2008–2018
Fuel: hybrid
System: Electrical

This page covers the Toyota Crown 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 Crown faults24 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 Crown Hybrid (3.5 GWS204 from 2008, 2.5 AWS210 from 2013) uses a 288V NiMH battery that degrades with age and heat. Once modules weaken you get falling fuel economy, the engine running far more than it should, and eventually the red triangle warning with hybrid system fault codes. A thriving NZ replacement industry exists precisely because these fail: reconditioned packs run roughly $2,000-3,500 and brand-new aftermarket packs around $4,000-4,500 fitted (Hybrid Batteries NZ lists a new GWS204/AWS210 pack at $4,035). Factory battery warranty on these imports has long expired.

What you would notice

Red triangle / hybrid system warning light
Petrol engine running almost constantly, rarely driving on EV alone
Fuel economy far worse than the ~6-8 L/100km these should achieve
Battery charge gauge jumping rapidly between full and empty

How to check it

Where to look. High-voltage battery pack behind the rear seat / in front of the boot

On the test drive, watch the energy monitor screen: the charge level should move gradually, not bounce between extremes, and the car should crawl on electric power at low speed with a warm battery.
Check fuel economy on the trip computer against what the seller claims.
Ask a hybrid specialist for a battery health scan (about $100-150) before purchase - it reads individual block voltages.

What it costs to put right

$2,000 to $4,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, 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 ever been replaced or reconditioned, and is there a warranty on it?”
“Can I get a hybrid battery health check done before I buy?”
“What fuel economy does it actually get around town?”

Now check the Toyota Crown 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 has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

Hybrid Batteries NZ - Toyota Crown GWS204/AWS210 replacement battery listing (NZD $4,035)
HybridCore NZ Toyota Crown remanufactured battery listings
Infinitev NZ Toyota Crown Hybrid (2008 onwards) replacement battery listing

Toyota Crown buyer questions

Is hybrid battery degradation (gws204 / aws210 crown hybrid) serious on a Toyota Crown?

We rate it major and common on the Toyota Crown. The Crown Hybrid (3.5 GWS204 from 2008, 2.5 AWS210 from 2013) uses a 288V NiMH battery that degrades with age and heat. Once modules weaken you get falling fuel economy, the engine running far more than it should, and eventually the red triangle warning with hybrid system fault codes. A thriving NZ replacement industry exists precisely because these fail: reconditioned packs run roughly $2,000-3,500 and brand-new aftermarket packs around $4,000-4,500 fitted (Hybrid Batteries NZ lists a new GWS204/AWS210 pack at $4,035). Factory battery warranty on these imports has long expired.

How much does it cost to fix on a Toyota Crown?

$2,000 to $4,500 at New Zealand independent workshop rates. 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 Crown years are affected?

Our research records this fault on the 2008–2018 Toyota Crown. 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.

How do I check for it before I buy?

On the test drive, watch the energy monitor screen: the charge level should move gradually, not bounce between extremes, and the car should crawl on electric power at low speed with a warm battery. Check fuel economy on the trip computer against what the seller claims. Ask a hybrid specialist for a battery health scan (about $100-150) before purchase - it reads individual block voltages. Look here: High-voltage battery pack behind the rear seat / in front of the boot