U151E Solenoid Kit, remanufactured and ready to install. Fits the U151E. Ships fast from the USA.
A V6 Highlander, Sienna, RAV4, Camry, Solara or Lexus RX330 that flares between second and third, slams the 2-3 upshift, slips once it is warm, or drops into a single gear with a solenoid code is usually telling you the U151E valve body has lost control of its clutch pressures. This seven-piece kit replaces the full set of electronic solenoids on the U151E five-speed in one pan-down service, so you are not chasing one failure after another on the same valve body.
The U151E is an Aisin-built five-speed front-drive transaxle (the U151F is the all-wheel-drive version). Its valve body uses two kinds of solenoids, and this kit includes both, as the photo shows. The tall linear solenoids meter oil pressure in fine steps; the computer uses them to apply and release clutches during each shift, to set line pressure, and to control converter lockup. The smaller bracket-mounted solenoids are simple on/off valves that move shift valves between positions. A linear solenoid that sticks or responds slowly does not always fail electrically, so it can set a performance code or no code at all while the shift feel goes bad.
Verify the fluid level hot using the check plug procedure for your vehicle, because low fluid on these sealed units mimics a pressure problem. Read the codes and note whether they are circuit faults or performance faults. Circuit faults can come from the harness or a connector, so test resistance at the solenoid as well as at the case connector; our guide on testing solenoids without a factory scan tool covers it. Watch commanded gear against actual gear in live data, too. GEARS magazine points out that a bench solenoid test machine is the reliable way to check linear solenoids, and that the solenoid modulator valve in the upper valve body should be checked for wear or sticking. Sonnax documents that a worn solenoid modulator valve bore causes erratic shift feel, harsh upshifts, bind-up and TCC cycling, which is exactly how failing solenoids feel. If that bore is worn, a remanufactured U151E valve body is the better fix than solenoids alone.
The U151E was used in the 2002-2003 Lexus ES300, 2003-2006 Camry V6, 2004-2008 Camry Solara V6, 2004-2010 Sienna, 2004-2013 Highlander V6, 2004-2006 RX330 and ES330, 2005-2007 Avalon and 2006-2012 RAV4 V6. The fitment notes for this kit also name several four-cylinder Camry, Corolla and Matrix applications that use the closely related U250E, and some vehicles, such as the 2007-2011 Camry 3.5L and 2014-up Highlander 3.5L, that use the six-speed U660E and are not covered. Read the transmission code on the case tag or the vehicle build label and compare your old solenoids, connectors and brackets with the photos before you order, or send us your year and VIN. All of our U151E and U250E parts are in the Aisin transmission parts collection.
Drain the fluid, remove the pan and the oil strainer, and unplug each solenoid. Lay the old solenoids out in the order they came off: several of the linear solenoids look identical but control different clutches, and a swapped pair gives wrong-gear starts and bind-ups that look like a bad part. Lube the new O-rings with Toyota WS fluid, seat each solenoid by hand, and tighten the bracket bolts evenly. Replace the strainer and pan gasket, refill with Toyota WS only, and set the level hot at the overflow plug. Then reset the transmission memory with a scan tool so the computer relearns clutch apply on the new solenoids; expect firm shifts for the first few drives. If you only need line pressure control, the separate U151E pressure control solenoid is available, and a unit that came apart with burnt fluid needs the U151E overhaul kit.
| Fits | U151E |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | U150 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 2004-2013 Highlander V6 used the U151E (U151F with AWD). Check the code on your transmission tag or build label, compare the photos to your old solenoids, or send us your VIN.
No. The 2007-2011 Camry 3.5L uses the six-speed U660E, which has a different valve body and solenoids.
Toyota WS (World Standard) ATF only. Set the level hot at the overflow check plug using the procedure for your vehicle.
Yes. Reset the transmission memory with a scan tool and drive through all five gears so the computer relearns clutch apply with the new solenoids.
The linear solenoids wear together in the same fluid, and the pan has to come off regardless. Replacing the set at once avoids a second teardown when the next one fails.
They will if the solenoids are the cause. Solenoid modulator valve bore wear in the valve body causes the same flare, harsh shifts and TCC cycling, so check the valve body if the complaint returns.
