1994 Q45 Oxygen Sensors

[sancem]

I want to replace the 2 oxygen sensors on my 1994 Q45. My dealer would not provide the OEM part numbers. I want to source the parts and do it myself. I want to get NGK (NTK) sensors. According to Alldata the right sensor OEM part number is 2269067U12 and the left sensor OEM part number is 2269064U06. The first appears to translate to NGK part number 24157 but the second does not appear to translate to any NGK part number! Some online sites indicate I need NGK part number 24142 and others indicate 24157. I understand they are the same sensor but one has an 18" lead and the other has a 72" lead. I have two questions (yeah I know I 've been rambling):

1) do I need one of each or two of the same one and, if so, which one, 24142 or 24157?2) where can I get the special oxygen sensor wrench that the service manual refers to? Thanks.

[AZhitman]

Welcome to NICO!!!

Save some money and buy them from sparkplugs.com ($42 each, I think). If you get the universal fit you can save more and just swap out the harnesses from your old O2 sensors.

[sancem]

That is where I want to to buy them but I'd like them to swap in neat and their website point at both part numbers! Can Q45 Tech help me?

[AZhitman]

I'm sure someone will chime in here with the correct info - OR you could call Joe at Scottsdale Infiniti (infinitipartsusa.com)

[90Q45blue]

Joe quoted me $103.08 for each O2 sensor. If I can get these NGK's for my 1990 Q45 for $50 apiece that would be sweet. I have a couple of questions though: are the NGK's just as good as the factory sensors? what difference am I looking at performance/fuel efficiency wise? if there's a big difference in gas mileage the factory would pay off the difference there. Also, will these even work for the 90? i would need the part number as well.

thanks,nick

[AZhitman]

NGK *IS* the factory sensor.

Again, check sparkplugs.com - You may have to call them.

[sancem]

Thanks. I should have mentioned I did call them and they referred me to NGK who requested the OEM part numbers. I obtained them from alldata and NGK could only match one of the two OEM part numbers with an NGK part number.

[90Q45blue]

Ok, just got off the phone w/ Brian at Scottsdale. He gave me two part number for my 90 Q45.2269060U122269060U11

These do not match the sparkplugs.com database. Does that mean I'm SOL?

Nick

[AZhitman]

No, let's wait for Dennis or Rob to chime in....

[Q45tech]

T3 always uses oem parts from dealer so we can't help with translation.Generally all Nissan O2 sensors [for OBD1] are the same assumming the number of wires are the same [preheaters].

Doubt you could go wrong [as far as the ecu sensing the switch point] .

[Q451990]

sancem,

Run a search for "sparkplug.com" using the "search" button at the top right corner of the screen (or in my signature line:)). I vaguely remember a discussion about this in the past, but I don't have the time to find it right now... Seems like the results with the sparkplug.com units were good but there was a discussion about the differences.

Heath

[sancem]

Thanks q451990. I did find a thread that kept referring to the NGK 24142 but its not definitive on my question.

Q45Tech,Let me ask you the question in a way which I am you can answer in good conscience. I have a 1994 q45 built in June 1993. Do my car's 2 oxygen sensors have a wire lead that is approximately 18 inches long or approximately 72 inches long or does it have one of each?

Thanks.

[AZhitman]

T3 always uses oem parts from dealer so we can't help with translation.

That's the problem - The dealers I called can't even agree on numbers, because of the conversion to NTK (from NGK???) and the difference between Nissans parts numebering system and the NGK stock #'s.

Generally all Nissan O2 sensors [for OBD1] are the same assumming the number of wires are the same [preheaters].Doubt you could go wrong [as far as the ecu sensing the switch point] .

That's the good news - Perhaps we could find out the # of wires on the Q 02 sensors, then just purchase Nissan units (since they're almost certian to be cheaper).

[sultan]

i just did them this morning on my 94 so: NGK 24142 (the only number listed on the NGK site's app guide) fit just fine. the overall length of the whole sensor+wires is around 18". the ones i took off were bosch, the passenger side one slightly longer than NGK, the driver's side slightly shorter. i used a 7/8" crows foot wrench to do it, from the bottom with a couple extensions and a jointed one. it's quite hard, i have them on tight, but it's very hard to do the driver's side one. i have not yet started the car, but i hooked up the O2 sensors and everything looks fine, i'm changing the oil and then i'll start it. i got the NGK's from sparkplugs.com.

i thought the factory ones were NGK, but the bosch one's i took out had the nissan symbol without the words on them. my car was dealer maintained for the first 90,000 miles, so maybe the dealer put them on?

[DAEDALUS]

Definitely no need for a 72" wire, I just wasn't sure 18" would be enough. The 24142 is listed as the replacement for both sensors on the '90 Q, and I didn't think there'd be much diference between the 2 models. Thanks for the confirmation Sultan!

[sancem]

Thanks Sultan. A pair of NGK 24142 will be ordered in five minutes from Sparkplug.com for my 94.

AZhitman thanks for the high hustle factor by the way.

Q45tech, One day I'm going to have a real tough question that no one but you can answer and it won't be a state secret and you are going to shine that day and be helpful with a terrific answer. Til that day....

[fxjackso]

The Nissan part has a fitting on one of the harnesses to clip onto a bracket that holds it, hence the two part numbers. Otherwise identical, and the NTK is a direct relacement for the original, which might be NTK or JEC (Bosch).

Get that slit crow's foot wrench (22mm) and attack from the bottom as sultan suggests. Other members have used extensions to reach from the top, but based on how long they said it took, you don't want to go there!