RE5R05A Solenoid Kit, new and ready to install. Fits the RE5R05A. Ships fast from the USA.
When an RE5R05A starts shifting like it has a mind of its own, the solenoid block on the valve body is usually where the trail ends. This is a complete new solenoid kit for the Jatco-built Nissan five-speed used in the Titan, Armada, Frontier, Pathfinder, Xterra and Infiniti QX56. Buyers typically land here after a scan tool reports a shift solenoid fault, after the truck went into limp mode on the highway, or after a rebuild shop recommended replacing the whole set rather than the one solenoid that set the code.
Every gear change in this transmission is electrical. The control module reads vehicle speed, throttle and fluid temperature, then energizes a combination of solenoids that direct oil to the clutches and brakes for the next gear. Separate solenoids handle line pressure and torque converter lockup. Because all of them share the same oil, the same heat and the same age, they wear together; a truck that has lost one coil often has others that are slow to respond. That is the practical argument for a full kit instead of a single piece.
It also matters which brand of solenoid is in your valve body today. Sonnax notes that Bosch, Nachi and Mitsubishi have all built low coast solenoids for the RE5R05A and that they interchange as long as the resistance matches. Their identification chart separates them by the plastic color at the O-ring area: brown on the early low-resistance Infiniti part, black on the Bosch and Nachi high-resistance parts, and white on the Mitsubishi.
Separate the electrical faults from the hydraulic ones. Circuit codes can be traced with a resistance check at the case connector and then at each solenoid. Performance or ratio codes with good resistance point to worn solenoid plungers or worn valve body bores, and only replacement or a pressure test will settle which. Look at the fluid too: on this transmission the cooler inside the radiator is a known failure point, and Sonnax warns that roughly half the cores they receive show water intrusion. Milky fluid means the radiator comes first. The diagnostic steps are laid out in our RE5R05A transmission service guide.
This kit is listed for the RE5R05A without a year limit. The transmission was built with three valve body design levels and several solenoid suppliers, so before installing, line up each new solenoid against the one it replaces: connector, bracket position and overall length should match. If your truck is a 2004 or 2005 QX56, measure the low coast solenoid first because of the August 2005 resistance change. If in doubt, send us the year and VIN. For year-specific options, compare the 2004-2009 solenoid kit and the rest of the RE5R05A collection.
If a new solenoid set does not cure the shift complaint, the valve body bores are the next suspect, and a replacement RE5R05A valve body is the more complete repair.
| Fits | RE5R05A |
| Part type | Solenoid Kit |
| Condition | New |
| 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.
Nissan Titan, Armada, Frontier, Pathfinder and Xterra, plus the Infiniti QX56 and several rear-drive Infiniti cars. Check your transmission tag or send us your VIN to be sure.
Sonnax reports that Bosch, Nachi and Mitsubishi low coast solenoids interchange as long as the resistance matches. Replacing the whole set at once avoids the guesswork.
Electrical codes with a bad resistance reading point to a solenoid. Performance codes with good resistance can be worn solenoids or worn valve body bores. If new solenoids do not fix it, the valve body is next.
If the fluid is pink or milky, yes. Coolant in the transmission damages solenoids and clutches, and new parts will fail again unless the radiator is replaced and the fluid flushed.
Clear stored codes and drive the vehicle through every gear over several trips so the module can adapt shift timing to the new solenoids.
