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CriticalCommonEngine

Subaru Impreza: EJ154 timing belt, tensioner and water pump replacement overdue (interference: yes)

EJ154 timing belt, tensioner and water pump replacement overdue (interference: yes) is a common engine fault on the Subaru Impreza on the 2000–2011 cars, and we rate it critical. Putting it right costs $700 to $1,400 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 44 documented faults on the Subaru Impreza.

Vehicle
Subaru Impreza
Engine
EJ154
Years
2000–2011
Fuel
petrol
System
Engine

This page covers the Subaru Impreza 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 Impreza faults44 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

The 1.5 litre EJ15 family boxer (EJ154 / EL154 / EL15) in the 2000 to 2011 Impreza drives its camshafts with a toothed rubber timing belt, like every EJ engine; it has no timing chain. Subaru EJ engines built from 1998 on, and all DOHC EJ engines, are interference designs, so a snapped belt bends valves. The belt, hydraulic tensioner, idlers and the belt-driven water pump are normally replaced together at around 100,000 km or 7 years, and a seized idler pulley is a common cause of belt failure on neglected cars.

What you would notice

  • No record of a belt change on a car over 100,000 km
  • Whirring or grinding from the front of the engine that rises with revs (worn idler or tensioner)
  • Coolant weep at the front of the engine below the belt covers

How to check it

Where to look. Front of the boxer engine behind the plastic timing belt covers

Ask for the service history and look for a timing belt kit invoice with date and odometer reading, and check the timing belt covers with a phone torch for a sticker recording the change. With the engine running, listen at the front of the engine for whirring, rattling or grinding from the belt pulleys. Look below the timing covers for coolant stains or drips from the water pump. If a workshop inspection is possible: have the left timing cover removed to check the belt for cracks and missing teeth, the idler pulleys for noise or play and the hydraulic tensioner for oil leakage.

Parts involved: Timing belt, Water pump.

What it costs to put right

$700 to $1,400 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

  • “When was the timing belt last replaced, and at what odometer reading?”
  • “Do you have the invoice or a sticker showing the belt change?”
  • “Were the tensioner and water pump replaced at the same time?”

Now check the Subaru Impreza 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.

  • Wikipedia: Subaru EJ engine (EJ15; 1998-on SOHC and all DOHC EJ engines are interference)
  • Cararac: timing belt for Subaru Impreza 1.5 EL154, 281 teeth x 30 mm
  • Gates timing belt kit TCK304 listing for Subaru Impreza
  • Schaeffler catalogue: Subaru Impreza GD2 and GH 1.5 timing belt and water pump kits

Subaru Impreza buyer questions

Is ej154 timing belt, tensioner and water pump replacement overdue (interference: yes) serious on a Subaru Impreza?

We rate it critical and common on the Subaru Impreza. The 1.5 litre EJ15 family boxer (EJ154 / EL154 / EL15) in the 2000 to 2011 Impreza drives its camshafts with a toothed rubber timing belt, like every EJ engine; it has no timing chain. Subaru EJ engines built from 1998 on, and all DOHC EJ engines, are interference designs, so a snapped belt bends valves. The belt, hydraulic tensioner, idlers and the belt-driven water pump are normally replaced together at around 100,000 km or 7 years, and a seized idler pulley is a common cause of belt failure on neglected cars.

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

$700 to $1,400 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 Impreza years are affected?

Our research records this fault on the 2000–2011 Subaru Impreza. 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?

Ask for the service history and look for a timing belt kit invoice with date and odometer reading, and check the timing belt covers with a phone torch for a sticker recording the change. With the engine running, listen at the front of the engine for whirring, rattling or grinding from the belt pulleys. Look below the timing covers for coolant stains or drips from the water pump. If a workshop inspection is possible: have the left timing cover removed to check the belt for cracks and missing teeth, the idler pulleys for noise or play and the hydraulic tensioner for oil leakage. Look here: Front of the boxer engine behind the plastic timing belt covers