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Subaru Legacy: EJ253 head gasket external leak (2.5i, BL/BP and BM/BR)

EJ253 head gasket external leak (2.5i, BL/BP and BM/BR) is a common engine fault on the Subaru Legacy on the 2003–2012 cars, and we rate it major. Putting it right costs $2,500 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 54 documented faults on the Subaru Legacy.

Vehicle
Subaru Legacy
Engine
EJ253
Years
2003–2012
Fuel
petrol
System
Engine

This page covers the Subaru Legacy 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 Legacy faults54 documented faults on this model

What you are looking at

A removed multi-layer steel head gasket held up, showing staining around the cylinder bore.Example of the part — not this vehicle

A used multi-layer head gasket. Discolouration between a cylinder and a water gallery is the tell.

John Furman · CC BY-SA 3.0 · Wikimedia Commons

What goes wrong

The 2.5i Legacy (BL/BP 2003-2009 and BM/BR until the FB25 arrived in 2013) uses the EJ253 with the same external head gasket weep as other Subarus of the era: oil and coolant seeping at the head-to-block joint from around 150,000 km, progressing to coolant loss and overheating. JDM 2.0R/2.0i EJ20 cars — the majority of NZ imports — are far less affected, as are the EZ30 3.0R six-cylinder cars. Budget both sides with MLS gaskets plus timing belt and water pump.

What you would notice

  • Coolant smell after a drive
  • Slow coolant loss from the overflow bottle
  • Oil weep visible at the head joins from underneath
  • Temperature rising on long hills

How to check it

Where to look. Head-to-block joint, both sides of the engine, low in the bay

Identify the engine first — 2.5i is the risk case; JDM 2.0 and 3.0R six are much safer bets for this fault. On a 2.5i, inspect both head-to-block seams from below with a torch, check coolant level and condition, and ask for gasket invoices. Evidence of overheating (new radiator, crusty overflow bottle) plus original gaskets is a walk-away combination.

Parts involved: Head gasket.

What it costs to put right

$2,500 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

  • “Which engine is it — 2.5i, 2.0 JDM, or 3.0R?”
  • “Head gaskets ever replaced, with invoice?”
  • “Any overheating history?”

Now check the Subaru Legacy 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.

  • All Wheel Drive Auto 'Subaru Head Gasket Problems Explained'
  • MechanicBase (lists 2000-2009 Legacy)
  • legacygt.com / subaruoutback.org EJ253 head gasket threads

Subaru Legacy buyer questions

Is ej253 head gasket external leak (2.5i, bl/bp and bm/br) serious on a Subaru Legacy?

We rate it major and common on the Subaru Legacy. The 2.5i Legacy (BL/BP 2003-2009 and BM/BR until the FB25 arrived in 2013) uses the EJ253 with the same external head gasket weep as other Subarus of the era: oil and coolant seeping at the head-to-block joint from around 150,000 km, progressing to coolant loss and overheating. JDM 2.0R/2.0i EJ20 cars — the majority of NZ imports — are far less affected, as are the EZ30 3.0R six-cylinder cars. Budget both sides with MLS gaskets plus timing belt and water pump.

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

$2,500 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 Subaru Legacy years are affected?

Our research records this fault on the 2003–2012 Subaru Legacy. 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?

Identify the engine first — 2.5i is the risk case; JDM 2.0 and 3.0R six are much safer bets for this fault. On a 2.5i, inspect both head-to-block seams from below with a torch, check coolant level and condition, and ask for gasket invoices. Evidence of overheating (new radiator, crusty overflow bottle) plus original gaskets is a walk-away combination. Look here: Head-to-block joint, both sides of the engine, low in the bay