AW55-50SN Valve Body 2000-2008, remanufactured and ready to install. Fits the AW55-50SN. Ships fast from the USA.
A 2000-2008 Volvo, Saab, Saturn Vue, Opel Vectra or Suzuki built around the AW55-50SN five-speed that suddenly shifts harsh, flares between gears, hesitates before it engages, or has thrown a pressure-control or shift-solenoid code is almost always pointing at the valve body before the rest of the transaxle is worth suspecting. This remanufactured valve body is built to cover the entire 2000-2008 production run of the AW55-50SN in one listing, which is the right call when your records do not pin down the exact build month or when you just want a part that is guaranteed to match whichever revision landed in your car.
The AW55-50SN is a 5-speed, front-wheel-drive electronic automatic transaxle built by Aisin Warner and used across 2001-2010 Volvo, Saab, Nissan, Opel/Saturn and Suzuki models. Inside it, the valve body is the hydraulic brain of the unit: it routes line pressure through a network of precision-machined bores and spool valves to apply each clutch pack and band in the correct order, and on this electronically controlled transaxle it also carries the pressure-control and shift solenoids the computer fires to time every shift. When the bores wear or a solenoid circuit goes weak, the computer can still command the shift, but the hydraulic result starts to slip, flare or arrive late.
Pull codes first and note exactly which shift or lockup event is affected, since a single bad circuit on this valve body usually isolates to one complaint rather than taking the whole transmission out. Our AW55-50SN service guide walks through the full diagnostic layout for this family and the specific wear points Sonnax and Transmission Digest have documented on it, so read it before you pull the pan to confirm the valve body is the actual fault rather than a tired pump or a worn clutch pack.
This valve body fits the AW55-50SN as installed across the full 2000-2008 run of the vehicles above. Because that is an eight-year production window, Aisin Warner and the automakers revised the casting and solenoid wiring more than once along the way, so match your old unit's casting marks and connector count before you bolt the new one in, or send us your exact year and VIN if you are not sure which revision you have. If you already know your build falls in a narrower window, the 2003-2007 version or the 2004-2007 version is cast to that tighter range and may be the closer match.
Change the fluid and filter in the same job so debris from the old valve body does not circulate through the new one, and use JWS 3309 or an equivalent full-synthetic ATF built to that spec rather than a generic Dexron fluid. Torque the valve body bolts in the factory sequence, not just snug-and-done, since an uneven bolt pattern on this unit is a documented cause of comeback leaks and cross-bore pressure bleed. Run the adaptive shift relearn after the first drive cycle so the computer stops compensating for the old unit's wear. If your old valve body was also slipping badly under load, pair this job with a shift kit; if a single code pointed at one circuit instead of the whole valve body, a standalone pressure control solenoid may be the cheaper fix to have on hand.
| Fits | AW55-50SN 2000-2008 |
| 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.
No. This is the valve body casting and internal valves only. If you want the shift and pressure-control solenoids included in the same purchase, see the valve body with solenoids version instead.
It was used across 2001-2010 Volvo, Saab, Nissan, Opel/Saturn and Suzuki models, including the Volvo S40/S60/V70, Saab 9-3, and Saturn Vue, in front-wheel-drive and all-wheel-drive applications.
Aisin Warner specifies JWS 3309. Q8Oils' Auto JK data sheet cross-references that spec directly against Volvo P/N 1161540 and GM 9986195, so any full-synthetic ATF built to JWS 3309 is correct; a generic Dexron fluid is not.
If codes point to one specific solenoid circuit and every other shift feels normal, the solenoid alone may be the fix. If multiple shifts are harsh or flared, or the problem has gotten progressively worse, the bores inside the valve body itself are the more likely cause.
Yes. The transmission control module learns pressure and timing values for your old valve body over time, and those values carry over to the new part until you run a relearn, which can make a good part feel harsh for the first several shifts.
Yes, this listing is built to cover the full 2000-2008 production run, including 2003-2007 builds. If you already know your exact year range, the dedicated 2003-2007 valve body is cast specifically to that window.
