Quick tip: don't buy third party transmission sensors/switches. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

AKADriver · 06-19-2023, 09:51 AM

On my car all the transmission switches had brittle and broken wiring and connectors. The wiring broke off from vibration and age on several of them. For $15 or so you can buy Beck/Arnley 2011671 or equivalents as replacements. You can even find them on AliExpress branded by HongWin (which is probably the actual manufacturer) as cheaply as $5.

This aftermarket sensor is inherently flawed - it's vented. You can blow a little air through it. What this means is when the transmission warms up and the fluid expands it will also blow oil right through it. I parked by car after a long drive and found about 3oz of MT-90 on the garage floor. A couple of the sensors are at the same level as the fill plug more or less, a couple sit slightly lower and are constantly submerged in oil.

There is one thing the aftermarket sensors are good for once you've made my mistake, though, and that's if you have a good soldering iron, you can cut off the wiring at the sensor (the wire they use is actually pretty nice with insulation that feels like silicone), do the same with your stock sensor, clean them up nice with isopropyl, and solder the new wire to the old sensor. Works perfectly.

But if you don't want to screw around, true OE sensors are still available:

32005-21U1B replaces the reverse light and 5th gear switch

32006-CD10B replaces the neutral position and 4th gear switch

slider2828 · 06-19-2023, 03:31 PM

All switches like pressure switches or reverse switches just best going with OEM really... Good info

zer0c123 · 08-11-2023, 06:05 PM

Yeah I had the same experience with aftermarket tranny sensors. When I replaced the clutch, all the sensors were leaking and the wires were brittle. Most snapped when I tried to reinstall them.

I bought WVE aftermarket sensors thinking they would be good as they were owned by NTK/NGK. Three of the sensors leaked through the rear wiring. The reverse sensor would not turn on the rear lights. When taking apart the harness to check the electrical, I noticed they manufactured it with poor weather sealing.

Only the neutral sensor worked and did not leak. I think the neutral one was basically OEM (made in japan) because it looked exactly like the old one. The other 3 were made in china.

I was going to order 3 new OEM sensors (reverse, 4th and 5th) from the Nissan dealer, but I realized the manual tranny on 240s don’t need the 4th or 5th sensors. There’s another thread on zilvia that mentioned it. Therefore I only ordered the OEM reverse.

For 4th and 5th sensors, I just replaced it with an oil drain plug. The size is M14x1.50. Been driving for awhile with no issues.

06-19-2023, 09:51 AM	#1
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 42 Posts: 3,475 Trader Rating: (1) Feedback Score: 1 reviews	Quick tip: don't buy third party transmission sensors/switches. On my car all the transmission switches had brittle and broken wiring and connectors. The wiring broke off from vibration and age on several of them. For $15 or so you can buy Beck/Arnley 2011671 or equivalents as replacements. You can even find them on AliExpress branded by HongWin (which is probably the actual manufacturer) as cheaply as $5. This aftermarket sensor is inherently flawed - it's vented. You can blow a little air through it. What this means is when the transmission warms up and the fluid expands it will also blow oil right through it. I parked by car after a long drive and found about 3oz of MT-90 on the garage floor. A couple of the sensors are at the same level as the fill plug more or less, a couple sit slightly lower and are constantly submerged in oil. There is one thing the aftermarket sensors are good for once you've made my mistake, though, and that's if you have a good soldering iron, you can cut off the wiring at the sensor (the wire they use is actually pretty nice with insulation that feels like silicone), do the same with your stock sensor, clean them up nice with isopropyl, and solder the new wire to the old sensor. Works perfectly. But if you don't want to screw around, true OE sensors are still available: 32005-21U1B replaces the reverse light and 5th gear switch 32006-CD10B replaces the neutral position and 4th gear switch

06-19-2023, 03:31 PM	#2
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 5,998 Trader Rating: (13) Feedback Score: 13 reviews	All switches like pressure switches or reverse switches just best going with OEM really... Good info __________________ Turn and Burn!

08-11-2023, 06:05 PM	#3
zer0c123 Join Date: Jul 2010 Location: California Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Yeah I had the same experience with aftermarket tranny sensors. When I replaced the clutch, all the sensors were leaking and the wires were brittle. Most snapped when I tried to reinstall them. I bought WVE aftermarket sensors thinking they would be good as they were owned by NTK/NGK. Three of the sensors leaked through the rear wiring. The reverse sensor would not turn on the rear lights. When taking apart the harness to check the electrical, I noticed they manufactured it with poor weather sealing. Only the neutral sensor worked and did not leak. I think the neutral one was basically OEM (made in japan) because it looked exactly like the old one. The other 3 were made in china. I was going to order 3 new OEM sensors (reverse, 4th and 5th) from the Nissan dealer, but I realized the manual tranny on 240s don’t need the 4th or 5th sensors. There’s another thread on zilvia that mentioned it. Therefore I only ordered the OEM reverse. For 4th and 5th sensors, I just replaced it with an oil drain plug. The size is M14x1.50. Been driving for awhile with no issues.