CriticalVery commonEngine

Subaru Liberty: EJ25/EJ20 Timing Belt and Water Pump Catastrophic Failure Risk

EJ25/EJ20 Timing Belt and Water Pump Catastrophic Failure Risk is a very common engine fault on the Subaru Liberty on the 2003–2014 cars, and we rate it critical. Putting it right costs $750 to $1,600 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 38 documented faults on the Subaru Liberty.

Vehicle: Subaru Liberty
Engine: EJ25 / EJ20
Years: 2003–2014
Fuel: petrol
System: Engine

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

All Subaru Liberty faults38 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Timing belt or Water pump yet. We would rather show none than show a picture of a different part.

What goes wrong

BP and BM Liberty models powered by EJ25 or EJ20 boxer engines use a rubber timing belt with a 100,000 km or 10-year replacement interval. These are confirmed interference engines: belt failure results in immediate piston-to-valve contact and catastrophic engine damage with no warning. Water pump failure while driving destroys the belt. The FB25 engine used in later BM Liberty models uses a timing chain and does not carry this risk, but EJ-series variants are pervasive across the BP and early BM range and must be checked.

What you would notice

Belt failure gives no prior warning in the majority of cases
Rough running or belt squeal from a worn tensioner bearing
Sudden engine cutout without restart after belt snaps
Knocking from engine if driven briefly after tensioner collapse

How to check it

Where to look. Front of engine (drive-belt end), inside timing cover

Confirm engine variant is EJ or FB before assessing risk.
For EJ engines, require a dated workshop invoice for timing belt replacement.
Check odometer against known replacement mileage.
If the vehicle is over 10 years old with no history, treat it as overdue regardless of kilometres.
Inspect for coolant weeping around the water pump as an early indicator of impending pump failure.

Parts involved: Timing belt, Water pump.

What it costs to put right

$750 to $1,600 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

“Is this vehicle fitted with the EJ25 or the FB25 engine?”
“Has the timing belt been replaced and can you provide documentary evidence?”
“Was the water pump replaced at the same time as the belt?”

Now check the Subaru Liberty 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 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.

Subaru Liberty buyer questions

Is ej25/ej20 timing belt and water pump catastrophic failure risk serious on a Subaru Liberty?

We rate it critical and very common on the Subaru Liberty. BP and BM Liberty models powered by EJ25 or EJ20 boxer engines use a rubber timing belt with a 100,000 km or 10-year replacement interval. These are confirmed interference engines: belt failure results in immediate piston-to-valve contact and catastrophic engine damage with no warning. Water pump failure while driving destroys the belt. The FB25 engine used in later BM Liberty models uses a timing chain and does not carry this risk, but EJ-series variants are pervasive across the BP and early BM range and must be checked.

How much does it cost to fix on a Subaru Liberty?

$750 to $1,600 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 Subaru Liberty years are affected?

Our research records this fault on the 2003–2014 Subaru Liberty. 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?

Confirm engine variant is EJ or FB before assessing risk. For EJ engines, require a dated workshop invoice for timing belt replacement. Check odometer against known replacement mileage. If the vehicle is over 10 years old with no history, treat it as overdue regardless of kilometres. Inspect for coolant weeping around the water pump as an early indicator of impending pump failure. Look here: Front of engine (drive-belt end), inside timing cover