NGTD wrote:
My mom's 2004 Legacy is on its 3rd engine and I have heard from a number of sources that Subaru sources a very short piston skirt design for the 2004 2.5L NA engines in an effort to improve fuel economy. This resulted in piston slap (a common problem in Subaru's) being even worse. Personally, I would avoid 2004's.
I hate Subaru Autoboxes - they just seem to drain all the fun out!
Funny you mention that. We bought my wife's '04 FozXS in '09 with 23k, and it has the worst piston slap I've ever heard from an otherwise strong Subaru engine. At an undermaintained 76k now, hasn't gotten worse... yet. Clatters like an OM617 Mercedes with dirty injectors when cold. And I love darn near everything about the car other than the auto box(still a huge improvement over earlier 4EATs, however).
For the OP:
'98-99: Impreza-based chassis. DOHC engine is a strong runner, but most were plagued by OE headgaskets. If fixed properly with the updated gaskets, they're fine. Drives like a '98 Impreza RS with tall tires because it is one, just with a dorkier body. Clutch chatter from an under-engineered pressure plate, put an Exedy Organic in it and it's fine. Rear wheel bearing issues unless repaired with the updated parts. S model buys you rear discs, rear LSD, 16" alloys, and a gigantic mammoth of a sunroof. '02-07 WRX suspension is a bolt in(less the front sway bar). WRX wagon struts and springs fit better than sedan. '98 Impreza RS/'97-99 Legacy GT power adders bolt straight in.
'00-01: Same chassis. SOHC engine. Lower torque curve than DOHC. Better OE headgaskets, but not great. Once again, solved by updated parts. Same for clutch and rear wheel bearings. Drives like a '00-01 Impreza RS with tall tires because it is one, dorky body yadda etc. Wife and I each owned an '01 L and loved them. Much more dynamic than you'd expect. Same WRX parts potential, '00-01 Impreza RS power adders bolt straight in.
'03-05: New Impreza-based chassis. Little better SOHC engine for '04, better headgaskets, better rear wheel bearings, bigger brakes('02 WRX spec), not sure how the clutch was. Much more refined feeling than the earlier cars. Still a good performer, just not as raw feeling, and the rear suspension bushings are too soft for my liking. E-throttle in '05. Auto box tuned better than -'01. '05 and newer nonturbo ECUs can be hacked via OpenSource. The reign of the XT turbo starts in this generation. The FozXT drives like a softcore '04 STI because it is one(less brakes, softer suspension, smaller intercooler and turbo, five speed instead of six, slower steering rack, etc). Rule of thumb: if it's mechanical bits that came OE on an '04 STI, it will bolt on to a Forester XT. Less useful trunk than the '98-01 cars.
'06-08: Same chassis. Couldn't tell you much about these, haven't owned one yet. Appears to be the same spec basically unchanged from '05 with an uglier body. I wouldn't kick one out of bed.
'09-present: New Legacy based chassis and the new RB25 2.5 NA engine started in here somewhere. Not terrible to look at, but much larger in every way than predecessors. New NA engine is a dog with slushbox compared to our '04, and turbos are auto ONLY in the US. My mother leased a new '11 NA/auto, and I hate it. Good little car unless you want to use more than 30% throttle or have owned an earlier iteration. The soul is gone.
Manuals aren't hard to find, particularly in earlier cars. 50:50 F/R torque bias in manuals, 70:30 default on autos(50:50 locked in manual 1st and 2nd, left up to the TCM in manual 3rd and drive). '03-'05 XT manual with the enormous sunroof is the sweet spot. Buy one if you can find one, you'll never find a better car for a small family to roadtrip through the mountains in.