If you get a code P0155 (Oxygen Sensor Bank 2 Sensor 1) it is the front right O2 sensor. (Techstream scanner and howto)

The Denso sensor is the original and same part as the Toyota so buy whatever is cheaper.

Denso Part#234-4630
Toyota Part#89465-50130

In this case at like $49 USD the Toyota is cheaper on eBay

eBay affil link here



This part is in common with the following models according to Toyodiy:

Japan 04/2001-06/2010 LEXUS SC430, TOYOTA SOARER UZZ40 84-01: SWITCH & RELAY & COMPUTER
Europe, General 05/2001-06/2010 LEXUS SC430 UZZ40 84-01: SWITCH & RELAY & COMPUTER
N. America 01/2001-06/2010 LEXUS SC430 UZZ40 84-01: SWITCH & RELAY & COMPUTER
Japan 12/2003-11/2008 TOYOTA CROWN, MAJESTA GRS18*,UZS18* 84-01: SWITCH & RELAY & COMPUTER
Japan 08/2005-11/2011 LEXUS GS460/430/350 GRS19*,UZS190,URS190 84-01: SWITCH & RELAY & COMPUTER
Europe, General 08/1997-12/2004 LEXUS GS300/430 JZS160,UZS161 84-01: SWITCH & RELAY & COMPUTER
Europe, General 01/2005-11/2011 LEXUS GS30, TOYOTA 35, 43, 460 GRS19*,URS190,UZS190 84-01: SWITCH & RELAY & COMPUTER
N. America 08/1997-12/2004 LEXUS GS300/400/430 JZS160,UZS16* 84-01: SWITCH & RELAY & COMPUTER
N. America 01/2005-11/2011 LEXUS GS SERIES GRS19*,URS190,UZS190 84-01: SWITCH & RELAY & COMPUTER
Japan 08/2000-07/2006 TOYOTA CELSIOR UCF3* 84-01: SWITCH & RELAY & COMPUTER
Europe, General 08/2000-07/2006 LEXUS LS430 UCF30 84-01: SWITCH & RELAY & COMPUTER
N. America 08/2000-07/2006 LEXUS LS430 UCF30 84-01: SWITCH & RELAY & COMPUTER