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I think there is confusion about which side the passenger side is on your car versus what the website believes is your passenger side. I would ignore the driver/passenger designation you see on these sites especially since your foreign car is probably a right hand drive car rather than left hand drive. The sensor location and harness locations are like the following:

B1S1 Rear/Firewall side top center of manifold. Harness is from transmission side of engine.
B1S2 Rear/Firewall side after catalytic converter. Harness is from timing belt side of engine
B2S1 Front/Radiator side center of manifold. Harness is from timing belt side of engine.
B2S2 Front/Radiator side after catalytic converter. Harness is from transmission side of engine.

Now as far as part numbers go, there are at least two part numbers for each sensor. NTK has their own part numbers while Hyundai has different part numbers for the same exact sensor. Here is a short list that I've found to be interchangeable:

B1S1 & B2S1: Hyundai 39210-37510 or 39210-37530; NTK 25180 (There may be a different part numbers for each bank, but they are identical in every way except for the color of the connector.)
B1S2: Hyundai 39210-37525; NTK 25178
B2S2: Hyundai 39210-37540; NTK 25181
 

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Discussion Starter · #23 ·
BRO Im not have a foreign car . PUERTO RICO its a territory of USA. My car driver side its the same as you the left side. So men i have a code and in autozone told me its the BANK2 SENSOR 2.you told me at pictures bank 2 sensor 2 its the one at the right side at the front manifold. So why when i check in this page for that sensor told me its 39210-37525 and shows at in the front (its the same as said its the left) and then told me its on right side. Its confusing and then you told me its another not that.. im so confuse
 

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Sorry I didn't recognize your flag. Didn't mean to offend you! I live way up in Washington state and we don't talk about PR often so it's kind of "out of sight, out of mind." I wish the US would promote PR to a state and add your star to our flag already! It's been long enough!

Sometimes websites refer to each bank as driver-LH/passenger-RH side as if it were mounted longitudinally for rear wheel drive even though it's transversely mounted as front wheel drive. It's stupid and I don't know why they do that... but in that case your bank1 against the firewall is considered passenger RH side and your bank2 along the radiator is considered driver LH side.

According to Amazon the list I just gave you is correct. I can cross reference those numbers to hyundaipartsdeal.com and I come up with the same results. This is B1S2 or passenger side: (Not the one you want)

136978

136979



So for B2S2 this is the one you want according to the AutoZone OBD2 tool.

136980

136981
 

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Discussion Starter · #25 ·
Im not offense relax bro. So men you are a helper . Im confuse because one counter guy in mopar here they sold genuine hyundai told me the 37525 its for bank2 sensor 2 so they are wrong. Anyways inm will post you the code i have tomorrow for you check but in auto zone they told me was the bank sensor 2 with a low voltage for period of time or something like that
 

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Yes that would be sensor B2S2 sensor 39210-37540. You can still use B1S2 39210-37525 in the B2S2 location... The only difference between those two sensors is the extra heat shielding on the B1S2 pig tail. Otherwise they are almost identical in pig tail length and they operate the same. If you had to, you could swap them no problem.

Do you have headers installed? If so, the voltage too low CEL might be caused by the catalytic converter delete. You might still have the check engine light even with a new sensor. It's not a critical sensor that's required for air to fuel ratio calculations. If PR doesn't have emissions testing you don't have to worry about the downstream O2 sensor check engine lights. I personally don't even use my downstream O2 sensors. I drive with a CEL all day every day because it doesn't affect performance. Only the upstream sensors could affect your air to fuel ratio and hurt performance.
 

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Discussion Starter · #28 ·
Check what info i found. So reading this what if the 2 types of o2 sensors use my car. This said the plugs of the 2 are different so i can't mix it because the plug of each other dont be the same.. so my car its fabricated later than january 2003 i beleved i know i told you the date but i dont remember jt. So if that its correct what part number i need? The same as you told me before? Let me know something more i remember reading here the tiburons with i dont remember what if this 2 types of sensors sensing material its the one more problematic for CEL issues with headers. You know one of this 2 are more sensitive or something like that for pops CEL with headers. So I'm lucky or I'm not with my date of fabrication?
 

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Discussion Starter · #29 ·
Check the info here
.

TECHNICAL SERVICE BULLETIN Group
36 - ENGINE ELECTRICAL
Number
03-36-012-1
Subject Date
2.7L V6 ENGINE OXYGEN SENSOR CHANGE 09-2003
Model
Santa Fe 2001-2004, Sonata 1999-2004 and Tiburon 2003-2004


This bulletin supersedes TSB# 03-36-012, 03-36-004 And 02-36-033. Please discard the previous TSBs.
DESCRIPTION:
The oxygen sensors for the 2.7L V6 (Delta) engine have been changed to a different type. The tables below provide the production change dates and oxygen sensor properties.
The O2 sensors, wiring harness And ECM are NOT Interchangable.

MODEL EFFECTIVE PRODUCTION DATE
Santa Fe (SM) V6 August 4, 2002 ~
Sonata (EF) V6 August 16, 2002 ~
Tiburon (GK) V6 January 1, 2003 ~
OXYGEN SENSOR PROPERTIES PREVIOUS
(SM V6 BEFORE 8/4/02)
(EF V6 BEFORE 8/16/02)
(GK V6 BEFORE 1/1/03) NEW
(SM V6 ON OR AFTER 8/4/02)
(EF V6 ON OR AFTER 8/16/02)
(GK V6 ON OR AFTER 1/1/03)
Sensing Material Titanium Zirconium
Sensor Operating Range 0 - 5 V 0 - 1 V
Sensor Principle Variable Resistance Voltage Generating
Lean Mixture 5 V 0 V
Rich Mixture 0 V 1 V
NOTE
• Do NOT attempt to change the O2 sensors from one type to the other on a vehicle.
• The O2 sensors, wiring harness and ECM related to this change are NOT Interchangeable.
If a vehicle was originally equipped with Titanium O2 sensors, Zirconium O2 sensors cannot be installed.
Please refer to the production date information to confirm which type of sensor applies.
• If a vehicle was originally equipped with Zirconium O2 sensors, Titanium O2 sensors cannot be installed.
Please refer to the production date information to confirm which type of sensor applies.
OXYGEN SENSOR CONNECTOR INFORMATION:
The O2 sensor connectors of the Titanium and Zirconium O2 sensors are different to prevent installation of the incorrect sensor type.
• If the O2 sensor connectors require abnormal force when attempting to connect the wiring harness to the sensor, the incorrect sensor is being installed.
• Although the connectors are different, if abnormally high force is used, it may be possible to improperly force the connectors together. This will result in a comeback with the Check Engine Light ON for O2 sensor codes.
• If the correct sensor is connected to the correct harness connector, the connectors slide together easily, and only require normal effort to secure the locking clip.
• If abnormal resistance is felt when connecting the sensors, refer to the production change information in this TSB as-well-as the photos in this TSB, which indicate the differences between the previous And new sensor types and connector designs to confirm that the correct sensor is being installed.



PART INFORMATION:
TIBURON V6:
SENSOR LOCATION PREVIOUS (TITANIUM) NEW (ZIRCONIUM)
B1/S1 39210-37125 (39210-3712A) 39210-37510
B1/S2 39210-37151 39210-37525
B2/S1 39210-37165 (39210-3716A) 39210-37530
B2/S2 39210-37190 39210-37540
NOTE
The new B1/S2 O2 Sensor part number is unique to the Tiburon V6; otherwise, all other new O2 Sensor part numbers are the same as the Santa Fe 2.7L V6 and Sonata 2.7L V6.
SONATA 2.7L V6:
SENSOR LOCATION PREVIOUS (TITANIUM) NEW (ZIRCONIUM)
B1/S1 39210-37125 (39210-3712A) 39210-37510
B1/S2 39210-37140 39210-37520
B2/S1 39210-37165 (39210-3716A) 39210-37530
B2/S2 39210-37180 39210-37540
SANTA FE 2.7L V6:
SENSOR LOCATION PREVIOUS (TITANIUM) NEW (ZIRCONIUM)
B1/S1 39210-37125 (39210-3712A) 39210-37510
B1/S2 39210-37145 39210-37520
B2/S1 39210-37165 (39210-3716A) 39210-37530
B2/S2 39210-37185 39210-37540
B1/S1 = Bank 1, Sensor 1 (Front O2) B2/S1 = Bank 2, Sensor 1 (Front O2)
B1/S2 = Bank 1, Sensor 2 (Rear O2) B2/S2 = Bank 2, Sensor 2 (Rear O2)
Bank 1 = Dash Panel Side Bank 2 = Radiator Side
INTERCHANGEABILITY:
The Previous and New O2 sensors are NOT
 

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There are Titanium and Zirconium O2 sensors. Their difference is the voltage 5V instead of 1V and their connectors are different to make sure you cannot mix them up. If you know your manufacture date you can figure out if you require the old 5V O2 sensors or the new 1V O2 sensors. The part numbers I gave you are for the 1V Zirconium O2 sensors for 2003 and newer vehicles. If you have a model 2003 car the manufacture date will be middle of 2002 or later. Anything manufactured before January 1st 2003 will have the older 5V Titanium O2 sensors. I don't believe that AutoZone is confusing this information if they have your VIN number.

If you need to verify which type of sensor you have, use an OBD2 tool to view how much voltage your O2 is reading. If you see more than 1V then it is a Titanium 5V sensor. However, the newer Zirconium 1V sensors will never exceed 1V.
 

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Discussion Starter · #32 ·
Yes that would be sensor B2S2 sensor 39210-37540. You can still use B1S2 39210-37525 in the B2S2 location... The only difference between those two sensors is the extra heat shielding on the B1S2 pig tail. Otherwise they are almost identical in pig tail length and they operate the same. If you had to, you could swap them no problem.

Do you have headers installed? If so, the voltage too low CEL might be caused by the catalytic converter delete. You might still have the check engine light even with a new sensor. It's not a critical sensor that's required for air to fuel ratio calculations. If PR doesn't have emissions testing you don't have to worry about the downstream O2 sensor check engine lights. I personally don't even use my downstream O2 sensors. I drive with a CEL all day every day because it doesn't affect performance. Only the upstream sensors could affect your air to fuel ratio and hurt performance.
My car DON'T HAVE CATALYTIC FOR MORE THAN 10 YEARS AND EVER SHOWS ME A CEL THIS APPEARS LIKE A FEW MONTHS
 

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Yup that's the correct sensor for the B2S2 location. It will reach the B1S2 location too, but it lacks the heatshield to protect it from excess heat. Make sure you wrap it up in a heat protective material.
 

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Discussion Starter · #36 ·
But for bank2 sensor 2 no will have any issues with protection? And i need to ask something hit my mind this morning.. i see the location in this headers for 02 are not the same in distance and place like the genuine manifold so.. i need to purchase a extension cable for this ( i dont have idea if this part exist) or this will fit without anything? I ask because bank 1 have a o2 in the tube goes connected at the header not header itself.. i don't know if you follow me
 

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Discussion Starter · #37 ·
So this ntk and a defouler for that o2 sensor ?. Oohh i miss to askk. The header cames with a gasket for the exhaust so .. you know i ask if its recomendable use this or its better use the genuine came with the car or purchase a genuine new ones? The car have more than 15 years so.. only ask
 

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It's ok if it's not heat protected. You can always wrap the sensor yourself to protect it.

If the harness won't reach the new O2 location on the header, you can use a harness extension. I mistakenly bought Honda/Acura extensions to find out they simply don't work. I leave my downstream b1s2 and b2s2 sensors disconnected because I don't have emissions testing in WA state. I can't find the right harness extension but you need to look for a 4 wire type connector that fits Hyundai vehicles with the 1V Zirconium sensors between 2003 and 2010.

I bought aftermarket headers just like yours, and I used the thick gaskets they came with. They work OK but some people believe the OEM thin gaskets work best. It's really up to your preference.
 

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Discussion Starter · #39 ·
Men thank for all .. and ask something .. men the brand MANDO its the same as GENUINE IN hyundai? Because men i purchase the ac pressure switch a d the rack and pinion and men its the genuine bro. So the o2 sensors MANDO looks similar the the genuine has my car right now installed ..i find it in rock auto check and told me
 

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Yes, Mando is another OEM genuine brand depending on the sensor. I personally have only seen NTK on original OEM O2 sensors but some others have seen Mando.
 
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