RE5R05A Pressure Control Solenoid 1941-90

The "1941-90" in this listing name is a piece of the Nissan service number 31941-90X00, the number this solenoid replaces. It also crosses to Bosch 0 260 130 030. If your Titan, Armada, Frontier, Pathfinder, Xterra or Infiniti QX56 has started banging into gear, slipping between shifts, or dropping into a fixed-gear limp mode with a solenoid code stored, and the part you pulled off the valve body carries one of those numbers, this is the replacement you are looking for.

What this pressure control solenoid does in an RE5R05A

The RE5R05A is a Jatco five-speed that first appeared in 2002 behind the 4.5L in the Infiniti Q45 and then spread across the Nissan truck and SUV line. It does not use simple on/off shift solenoids. Instead, a row of seven electronically modulated solenoids along one edge of the valve body each meters oil to its own job: line pressure (EPC), torque converter lockup, the direct clutch, the front brake, the input clutch, the high and low/reverse clutch, and the low coast brake. Because every one of them regulates pressure rather than just opening a port, parts catalogs tend to call any of them a pressure control solenoid. The TCM sends a duty-cycle signal, the solenoid turns that into a matching oil pressure, and the clutch or valve it feeds applies firmly or softly. A solenoid that sticks, leaks internally or loses resistance makes that clutch apply at the wrong pressure, and the computer sees the ratio go wrong.

Symptoms of a failing RE5R05A pressure control solenoid

• Harsh, thumping engagement when shifting from park into drive or reverse
• Flare or slip on one particular upshift while the others feel normal
• Sudden fail-safe mode with the check engine light on, usually stuck in one gear until the engine is restarted
• Generic pressure control solenoid codes such as P0745 or P0748, or a Nissan code that names the specific clutch solenoid circuit
• Problems that start right after the fluid turned pink or milky from a failed radiator cooler, a well known RE5R05A weak point

How to confirm the solenoid before you buy

Read the code first. Nissan names the circuit, so the code tells you which of the seven positions to look at. With the pan down, unplug that solenoid and measure its resistance, then compare against a known-good unit of the same style. Look hard at the fluid and filter too: Sonnax reports that roughly half of the RE5R05A cores they receive show water intrusion from a failed cooler in the radiator, and coolant ruins solenoids and clutch material together. Our RE5R05A service guide walks through the pan drop, the solenoid block and the cooler check step by step. If several solenoids test bad or the fluid is contaminated, the complete RE5R05A solenoid kit is the better buy.

Fitment

This solenoid fits the RE5R05A five-speed and replaces Nissan 31941-90X00 and Bosch 0 260 130 030. It is the black-bodied style with a two-pin connector and a steel hold-down tab, which is not the same body as the silver-capped Bosch 0 260 130 031 sold as our RE5R05A TCC and line pressure solenoid. Before ordering, set your old part beside the photos and match the body shape, connector and printed number. Infiniti also used a low-resistance (10-15 ohm) low coast solenoid until August 2005 and the 20-40 ohm version afterward, so on early Infiniti cars measure your original. When in doubt, send us your year and VIN. The full range of parts for this unit is on the RE5R05A parts page.

Install notes

• Drain the fluid and drop the pan; the solenoids bolt to the valve body with a single hold-down tab each.
• Lubricate the new O-rings with clean ATF and press the solenoid squarely into its bore. A rolled O-ring causes a pressure leak that feels exactly like a bad solenoid.
• Inspect the bore and the screen for debris. Heavy wear in the valve body bores points toward a replacement RE5R05A valve body instead of a single solenoid.
• Refill with Genuine NISSAN Matic S ATF (Matic J is the listed alternative) and set the level hot using the factory procedure.
• Clear codes, then drive through every gear over a few trips so the TCM can relearn shift timing.

Why does the listing say 1941-90?

It is shortened from Nissan service number 31941-90X00, the part this solenoid replaces. It does not mean the part fits 1941 to 1990 vehicles. The RE5R05A was built from 2002 on.

Which solenoid position does this go in?

Match it to the part you remove. This is the black-bodied Bosch 0 260 130 030 style with a mounting tab. The silver-capped Bosch 0 260 130 031 used for line pressure, TCC and front brake is a different part.

Can I replace just one solenoid?

Yes, if only one circuit set a code and the fluid is clean. If the fluid shows coolant or several codes are stored, replace the full solenoid set and fix the cooler first.

What fluid does the RE5R05A take?

Nissan specifies Genuine NISSAN Matic S ATF, with Matic J as the approved alternative. Do not use a generic multi-vehicle fluid.

Will the truck need a relearn after the swap?

Clear the codes and drive it through all five gears over several trips. Shifts can feel firm for the first few drives while the TCM adapts.

• Nissan/Infiniti RE5R05A Transmission Service Guide: Pathfinder, Armada, QX56