where is my oxygen sensor B1S1 on 96 Infiniti I30?

[jerseyboy75]

I need to replace my 02 sensor B1S1 on 96 Infiniti I30, where are the sensors located?

[loystock]

You have to understand first the engine-exhaust layout so as not to confuse one sensor from the other. In the 96 I30 with Federal Emission configuration, there are 3 Oxygen sensors - 2 FRONT and 1 REAR. The VQ engine with transverse mounting places Bank 1 (for cylinders 1-3-5) closer to the firewall while Bank 2 (cylinders 2-4-6) closer to the radiator. In general, the FRONT O2 sensor refers to mounting before (upstream) of the catalytic converter while the REAR refers to mounting after (downstream) of the 'cat.'

Front Right O 2 Sensor (B1S1) - as the name implies, is mounted on the Bank 1 vertical pipe, right-hand side. This is what you need, NGK P/N:24525.

Front Left O 2 Sensor (B2S1) - is mounted on the Bank 2 vertical pipe, left-hand side. The part number is the same as the front right.

Rear O2 sensor - this is mounted just after the cat, NGK P/N: 24630

To further clarify it, once you are SAFELY under the car, the front exhaust pipe is for Bank 2 and the 2nd exhaust pipe is for Bank 1.

I normally go to NGK.com a.k.a sparkplugs.com for OEM and quality O2 sensors. The NGK 24525 is priced at $68. At Amazon.com. they are currently selling this NGK/NTK sensor for $58 with free shipping - a bargain for quality O2 sensor.

If you know how to splice wires (and read schematic diagram), you can buy universal O 2 sensor for $25-50. O2 sensors from NGK/NTK, Denso and Bosch are reliable. Please avoid the cheap ones from eBay.

An O2 sensor adapter, @ $10, may come in handy, as well as PB Blaster/WD-40.

[jerseyboy75]

Thank you for all the info, would you have a diagram or a website I can go on to view the diagram of where the 2 front oxygen sensors, B1S1, B2S1 go?

[loystock]

Go to IoS - infinitipartsUSA.com a.k.a. everythingnissan.com or everythinginfiniti.com and enter the appropriate model and model year. Select Emission System->Emission Components->Oxygen Sensor->Front. Once you have the pricing info, click-on "View Illustration" and it should display the emssion components. Here is the actual link. You have to cut and paste into the URL. (web address)

http://www.infinitipartsusa.co...gid=0

It is also available in the infinitihelp.com and even at Autozone.