U660E Solenoid Kit 2007-2018, new and ready to install. Fits the U660E. Ships fast from the USA.
A 2007-2018 Lexus ES350, V6 Camry or Avalon that sets a pressure control solenoid code, drops into fail-safe, or bangs into one gear and slurs into the next is often carrying a set of worn solenoids on its U660E six-speed. This kit replaces that whole electrical layer in one piece. As photographed, it is seven solenoids already plugged into the internal wiring harness, with the harness ending at the round case connector and its mounting bracket, so nothing has to be pinned or routed one wire at a time. It is listed as new and is matched to the ES350 as its reference vehicle.
The U660E has no throttle valve cable and no mechanical governor. The computer decides every shift and every pressure, and the solenoids on the valve body turn those decisions into oil. Small on/off solenoids move shift valves. The larger linear solenoids are current-controlled: the computer varies the current and the solenoid meters a matching pressure to a clutch, to line pressure, or to the lockup clutch in the converter. On a clutch-to-clutch shift one linear solenoid releases the outgoing clutch while another applies the next one, so a single sluggish solenoid upsets that overlap and the shift either flares or ties up.
GEARS Magazine makes a useful point for anyone buying solenoids for this unit: Toyota solenoids rarely fail electrically. They wear out mechanically, from contaminated or broken-down fluid that sticks the valve inside, and the computer reports it as a performance code rather than an open or shorted circuit. That is why a coil can measure fine on a meter and still be the problem.
Start with the fluid, because it decides whether solenoids are the cause or the victim. Toyota requires WS fluid and checks the level hot, at 185-194 F, through the overflow plug; a U660E that is a quart low or filled with a generic ATF throws performance codes and shudders on its own. Next, think about the valve body. Sonnax documents bore wear at the solenoid modulator valve that feeds the linear solenoids too much pressure, and wear at the lockup control valves that causes converter slip and harsh downshifts. New solenoids in a worn valve body will not hold. Our U660E and U760E problems guide covers the shudder test and those bore checks, and if the bores are gone a complete U660-series valve body is the better buy than solenoids alone.
This listing covers the front-drive U660E from 2007 through 2018, with the Lexus ES350 as its reference. GEARS Magazine dates the U660E to the 2007 ES350 and Camry, the 2008 Avalon and the 2009 Venza, all behind V6 engines. The listing also names the RX350, Highlander, Sienna, Venza and some NX models in certain years. All-wheel-drive versions are the U660F, and the four-cylinder U760E uses a different set, so confirm the transmission code from the vehicle build label or your VIN. Toyota made running changes over twelve years, so lay your old harness next to the photo and match the connector count and case connector, or send us your year and VIN. Later units have their own 2018-2020 U660E solenoid kit, and everything for this transaxle is on the U660E collection page.
If the unit is coming apart for a firmer, longer-lasting calibration, the U660E shift kit pairs well with this harness, and our U660E fluid type and capacity guide covers the refill.
| Fits | U660E 2007-2018 |
| Part type | Solenoid Kit |
| Condition | New |
| Brand | OEM |
| Reference | ES350 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
As pictured, seven solenoids already connected to the internal wiring harness, which ends at the round case connector with its mounting bracket. A filter, pan gasket and fluid are not included.
The listing names the Highlander and Sienna in some years, but only if the vehicle has the front-drive U660E. All-wheel-drive versions use the U660F and four-cylinder models use the U760E. Confirm the transmission code, compare your old harness to the photo, or send us your year and VIN before ordering.
Yes. Toyota solenoids usually fail mechanically, with the valve sticking from fluid contamination, so the computer sets a performance code while the coil resistance looks normal. Rule out low or incorrect fluid and valve body bore wear before replacing them.
Toyota WS (part 00289-ATFWS) or a fluid that states it meets the WS specification. Set the level with the engine running and the fluid at 185-194 F using the overflow-plug procedure.
Yes. Clear codes in all modules, then run Toyota's ECT reset memory function with a capable scan tool and drive the car from cold to fully warm. Disconnecting the battery will not clear the learned values on this unit.
