AW55-50SN Valve Body 2003-2007, remanufactured and ready to install. Fits the AW55-50SN. Ships fast from the USA.
Volvo, Saab, Saturn and Opel models built between 2003 and 2007 share the same mid-cycle AW55-50SN casting, and when that transaxle starts shifting harsh, dropping into limp mode, or flagging a pressure-control or shift-solenoid code, the valve body is the part that wears before anything downstream of it does. This remanufactured valve body is matched specifically to the 2003-2007 build, so you are not guessing whether an earlier or later casting will bolt in cleanly.
The AW55-50SN is Aisin Warner's 5-speed front-wheel-drive electronic automatic, used across 2001-2010 Volvo, Saab, Nissan, Opel/Saturn and Suzuki vehicles. Its valve body routes line pressure through a stack of precision bores and spool valves to each clutch pack and band, and carries the pressure-control and shift solenoids the transmission control module pulses to time every shift. Sonnax's own layout reference for this family documents how tightly those circuits are packed, which is part of why a single worn bore or sticking valve can throw off more than one gear at a time.
Pull codes before you buy anything. ATRA's Gears magazine documented a specific trap on this generation: a fill plug and the low/reverse band anchor look almost identical on these units, and a tech who removes the wrong one during a routine fluid change lets the band walk out of position, which presents as a sudden loss of 3rd gear that has nothing to do with the valve body at all. Confirm the real fault with a scan tool and, if the complaint showed up right after a service, rule that specific mix-up out first. Our AW55-50SN service guide covers both failure paths side by side.
This valve body is cast to the 2003-2007 AW55-50SN specifically, which keeps you off the earlier and later revisions used outside that window. Because the AW55-50SN still varied slightly by market and option package even within those years, match your old unit's connector count and casting marks before installing, or give us your year and VIN to confirm. If your vehicle falls outside 2003-2007, the full-range 2000-2008 version or the narrower 2004-06 version will be the better fit.
Service the fluid and filter at the same time, using JWS 3309 or an equivalent full-synthetic ATF rather than a generic Dexron product, and avoid disturbing the low/reverse band anchor while you are in there. Torque the valve body bolts to spec in the factory sequence, then run the adaptive relearn once the vehicle is back on the road so the computer stops compensating for the old unit. If the friction material in the clutch packs is also due, add a clutch friction plate kit to the same job; if a single circuit tested bad rather than the whole valve body, the 2003-spec pressure control solenoid may be the narrower fix.
| Fits | AW55-50SN 2003-2007 |
| Part type | Valve Body |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
On this generation, the fill plug and the low/reverse band anchor look nearly identical, and removing the wrong one during a routine service lets the band walk out of position, causing a sudden no-3rd-gear complaint that is unrelated to the valve body. Confirm which failure you actually have before ordering.
No, this is the valve body casting and internal valves only. For the version that includes the solenoids, see the valve body with solenoids listing.
This listing is cast specifically for 2003-2007 builds. A 2004 is covered; a 2008 is not — use the full-range 2000-2008 valve body for model years outside the 2003-2007 window.
JWS 3309 or a full-synthetic ATF built to that specification. Q8Oils' published data sheet cross-references JWS 3309 directly against Volvo and GM part numbers used on these transaxles, so check the bottle against that spec, not just a Dexron label.
Run the adaptive shift relearn after the first drive. The control module stores pressure and timing values learned from the old, worn valve body, and those stale values will make a good replacement feel harsh until a relearn resets them.
