🔧 Upgrade your ride with precision that plugs in and plays!
The NGK 23139 Oxygen Sensor is a direct OEM replacement featuring a 4-wire plug-in design for effortless installation. Platinum-coated for superior durability, it withstands extreme temperatures up to 3200°F while delivering precise lambda and voltage readings. Tested individually to meet dealer-quality standards, this sensor ensures optimal engine performance without any cutting or splicing.
| Brand | NTK |
| Item dimensions L x W x H | 19 x 1 x 1 inches |
| Item Weight | 3.52 ounces |
| Style | Modern |
| Measuring Range | 0.1 - 1 lambda or 1 - 10 volts |
| Mounting Type | Plug Mount |
| Output Type | Electric |
| Specific Uses For Product | Oxygen Sensor |
| Upper Temperature Rating | 3.2E+3 Degrees Fahrenheit |
| UPC | 087295231395 826732032337 |
| Global Trade Identification Number | 00087295231395 |
| Manufacturer | NGK Spark Plugs |
| Product Dimensions | 19 x 1 x 1 inches |
| Item model number | 23139 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 23139 |
| OEM Part Number | 56041943AA; 56041950AA |
D**
OEM replacement
Good product. OEM QUALITY, direct fit.good price
D**F
Perfect fit for Oxygen sensor error code P0031
Perfect OEM fit. Fixed a check engine light. In fact the cable is about 4 to 6 inches longer allowing you to place it and secure it even better than the original part. Please be aware of the right part to replace depending on the code you get.For Jeep Liberty 02/06 you have 4 Oxygen Sensor one before and after each Catalytic Converter on both Catalytic identify as Bank 1 for the Driver side and Bank 2 for the Passenger Side.There is another after burn Catalytic Converter that goes to te exhaust (parts not mention OEM brand is NTK for Direct Fit. In my case, here are the part numbers and placement for Jeep Liberty MY 02/06 according to the error codes P0031 read in my ODB II. To fix this you’ll need the right part since the position and length of the cable of the sensor are different. In this case P0031 was related to a “HOS2 Heater Control Circuit Low Bank Sensor 1”. In this Case B1S1 stands for Block 1 Sensor 1zWith that info I was able to buy the part, but needed to know which one was Bank 1 or Bank 2 as well as Low or High.Hope this info help you clarify which one to replace.BANK 1 = Driver Side /LEFTPART # PLACEMENT2139 B1S1 (Before Catalytic Driver side)23141 B1S2 (After Catalytic Driver side)BANK 2 = Passenger Side/ RIGHTPART # PLACEMENT23138 B2S1 (Before Cat. Passenger Side)23142 B2S2 (After Cat. Passenger Side)
D**N
Worked well on a 2001 Jeep TJ
Works good on the correct bank (wire length is different for each bank), communicating no problem
D**.
Will NOT fit 2002 Jeep Wrangler 4.0 TJ.
Will NOT fit 2002 Jeep Wrangler 4.0 TJ. The sensor fit in the header but the electrical plug is wrong. The alignment groves do NOT line up. If I would have checked the picture above I would have known that. Because I am stubborn I tried cutting the outer edge of the plug so it would plug in anyway. It does plug in but I am still getting the code. Not sure if the wires are in a different order on this one or if I have other issues. I'm sure the sensor is fine just not for a 2002 inline 6 Jeep TJ
D**N
excellent
Perfect fit
F**Y
Bank 1, Sensor 1
Perfect fit. Sprayed old one with PB Blaster. Soaked for 2 days. Installed new NTK. Perfect plug and sensor end. 2003 Jeep Wrangler Sahara 4.0 liter. For Bank 1, Sensor 1...Driver side.
W**E
Sizing Not Accurate
NGK 23139 Bank 1 Sensor 1 will not fit 2001 Jeep Wrangler Sport 4.0L. Sensor fits manifold, however sensor plug side grooves are parallel, and should be offset to fit OEM plug. So the plug is not compatible with OEM male side of plug.
M**N
OEM sensor
These are OEM sensors.
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