5L40E Valve Body 1999-2003, remanufactured and ready to install. Fits the 5L40E. Ships fast from the USA.
A 1999-2003 BMW 3 Series (325i/330i) or 5 Series (525i/530i) built with the 5-speed automatic that shifts hard, hesitates going into gear, won't move when hot, or has thrown a ratio code in the P0731-P0735 range is almost always dealing with a worn valve body rather than a transmission that needs to come out. GM's Strasbourg division built this unit for BMW, where it is badged the A5S 360R; GM's own parts system calls it the 5L40-E, and that is the name it is sold under in the aftermarket. This remanufactured valve body is built for the 1999-2003 generation and bolts in as a direct replacement for the factory unit.
The 5L40E's valve body is a hydraulic assembly bolted to the pump cover that routes line pressure to every clutch pack through a set of precision-machined valve bores, and it carries the shift and pressure-control solenoids the transmission control unit uses to time each shift and apply the torque converter clutch. Two bores inside this unit are known weak points as the transmission ages: the actuator feed limit valve bore and the pressure regulator valve bore. Wear in either one changes how pressure builds and bleeds off inside the valve body, and that shows up as the specific symptoms below long before the transmission itself is actually damaged.
Pull codes first. A P0731-P0735 ratio code, particularly one that only sets once the fluid is hot, points directly at feed limit valve bore wear inside the valve body rather than a sensor or wiring fault. If the complaint is closer to no movement at all once warm, with pressure dropping off and oil venting, that matches pressure regulator valve bore wear in the pump cover section rather than the actuator side - both are addressed by replacing the valve body as a complete remanufactured unit instead of chasing individual bores.
This valve body fits the GM-built 5-speed automatic (BMW designation A5S 360R, GM designation 5L40-E) as installed in 1999-2003 BMW 325i and 330i (3 Series) and 525i and 530i (5 Series) models. BMW began phasing this transmission in during the 1999 model year and continued using it past 2003, and Cadillac adopted the same transmission platform in the CTS starting in 2003, so confirm your exact application before ordering - check the transmission tag (a BMW unit is marked with a G or Z designation) or your old valve body's casting marks and connector, or send us your VIN and we will confirm the correct match.
Change the fluid and filter at the same time you install the valve body - our 5L40E/5L50E filter and pan gasket kit covers both in one order, since old debris left in the pan will otherwise circulate straight back through the new unit. Stroke the new valve bores by hand before final assembly to confirm free movement, and torque the valve body bolts to spec. If the pressure control or TCC solenoid tested weak during diagnosis, replace it at the same time with our 5L40E pressure control solenoid or 5L40E TCC solenoid rather than reopening the unit later, and consider a full 5L40E solenoid kit if the transmission is already high mileage.
| Fits | 5L40E 1999-2003 |
| Part type | Valve Body |
| Condition | Remanufactured |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
1999-2003 BMW 325i and 330i (3 Series) and 525i and 530i (5 Series) built with the GM-built 5-speed automatic, BMW designation A5S 360R, GM designation 5L40-E.
Ratio error codes P0731 through P0735, most commonly P0735 for 5th gear, which tends to set once the transmission is hot.
That symptom, combined with oil venting or draining back, points to pressure regulator valve bore wear in the pump cover section of the valve body rather than a clutch or electrical fault.
Cadillac adopted the same 5L40-E transmission platform starting with the 2003 CTS, but this listing is built for the 1999-2003 BMW application - confirm your exact fitment before ordering.
Remanufactured and tested before it ships, built specifically for the 1999-2003 5L40E.
Fresh fluid and filter at minimum. If the pressure control or TCC solenoid tested weak, replace it in the same job rather than reopening the unit later.
