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2009 2.5L MT
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7 Posts
I hear in NZ there's been a few issues with diesels but in saying that I suspect a lot to do with a lot of cold running which the diesel engine suffers a lot ... Especially particulate filter ... Keeping to the service schedual is also very important as well ...
Although I don't have a diesel version I would benefit as my travel round trips often exceed 1000kms at 5lt per hundred km ... Very economical ... But as ever depends how heavy the foot is on the gas ...
 

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2008 Subaru Forester X (SH)
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17 Posts
I have 2012 EE20. I believe it to be Euro5. Has the plastic intake manifold, as opposed to the alloy one, used in the earlier model.

So far, it has been fine. The only issue was a sporadic, rapid injector pulsing on start up. Which has long since gone away, presumably from an ECU update, done during last few Warranty Period services.

I have had no ECU detected, or drive-ability related issues with DPF or EGR. Although, they have naturally filled up with their respective exhaust byproducts.

Cleaning DPF and Intake manifold is relatively simple (so if you’re happy to work on your car, consider them a minor issue). I haven’t cleaned, nor inspected the EGR valve itself, as the inlet port from the EGR valve system, into the throttle body/intake manifold, was clear.

Maybe check engine numbers, to see if a particular prefix, codes for Euro 5. E.g. SHN vs SH9 etc..
In my opinion:
1) We didn't get the EURO4 diesels here in Oz. Lucky us. Any level of broken crankshafts is unacceptable.
2) The early EURO5s (like my 2010) had issues- but they can be fixed (mostly I think) by experienced, knowledgeable diesel Subaru specialists. Glow plugs fail. Hoses crack/split, causing DPF issues. The A/C compressor tends to self-destruct. The clutch is weak, with an imprecise gear selection. Interior plastics are cheap and hard but durable, whilst the climate control doesn't (or won't).
3) Things rapidly improved after 2011/2012- less, if any, glow plug issues, improved injectors and ECU/injection systems, better pipes and other running improvements to internals and sortware seem to fix most of the issues judjing by the comparative lack of issues on this forum (and others I looked at in the past). I would suggest the latter models are likely to be relatively trouble free so long as properly maintained.
Hi Patrick,

I’m also is Oz and looking at buying a 2010 diesel Forester (210k kms) and saw your post - I’m wondering if it’s a good idea! :)

I do my own maintenance but don’t want to spend all my time doing it… I know some diesels are sensitive to the oil/fuel used but I figured if I’m doing a longer commute then a diesel is not a bad choice. Are they really this bad?

Cheers,
Chris
 

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2010 Impreza 2.0D, 2017 Outback 2016 2.0D Lineartronic, 2013 Forester 2.0D
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2 Posts
Hi Chris,

That is quite some mileage and I hope it is a good deal, but I would suggest to stay below the 150k mark...

My advice is: have a Subaru mechanic with the Subaru Select Monitor (SSM) check it! They can inspect the state of the EGR valve and most importantly of the DPF. This computer based diagnostic took less than 15 minutes in my case (it is a blast from the past to see the mechanic pull out this old windows xp netbook to load the data) and I also had asked the mechanic to put the car on the lift and check it from below.
He knew what to look for and he found a couple of points which could have lead to problems with the exhaust system in the future (and for the mandatory state inspection).
It cost me less than 100 bucks, he told me what shape the car was in and it gave me leverage to negotiate the price with the seller (who ended up paying for the repairs and an oil change).
The car is running great!

I am doing most of the maintenance myself (I changed the diesel filter, MT and diff fluid, air filters, brake pads) although I am leaving the coolant change to the dealer after trying it once, it is way too messy and tricky to manage 3 times 9 liters of polluting waste and hot smelly bubbles...
 

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Registered
2008 Subaru Forester X (SH)
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17 Posts
thanks Vinnych, agree re a specialist to check it over. In case you were thinking 210,000 miles the car has only 125-130,000 miles which normally means a Diesel engine is ‘run in’ 😂 With Subaru diesels I’m starting to get the idea that there are some issues but surely the horror stories are the exception?
Otherwise, I’ll buy something different - a Volvo/Peugeot/BMW…
 

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2009 2.5L MT
Joined
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7 Posts
Smiles what I didn't mention in my last post is that among other things I do have a compression engine qualification ... Having spent 5yrs plus working in the crash / break down / recovery sector around 170,000 kms seems to be magic number for over heating and radiator failures ... So this should factored in to any purchase ie changing rad gives you yet another 170,000km discounting any other issues ... You may observe .
 
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