1.Lexus RX（incl. RX350/RX450h） O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-48020(for 3.5L V6 engine, DENSO Replacement No. 234-9015)
Downstream(Rear) Oxygen Sensor part No.: 89466-48020 (for hybrid system catalytic converter, bandwidth field detection function)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0135 (Heating Circuit Failure): Abnormal heater resistance value, need to check harness voltage (12V standard)
P0171 (mixture too thin): long-term fuel correction is out of range, it is recommended to check the air flow meter signal synchronously
What causes & How to repair
Highway driving: high temperatures cause deterioration of ceramic components, resistance test every 60,000 km recommended
Difficulty in starting in cold areas: low temperature affects heating efficiency, and it is necessary to focus on checking the problem of melted heating wire.
​How much oxygen sensor cost to replace？
Genuine parts: 650-950 (labor 200-300)
Sub-factory parts (DENSO/NGK): 400-700

2.Lexus ES (incl. ES350/ES300h) O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-48040(fits 2.5L inline-four, BOSCH Replacement #17107)
Downstream(Rear) Oxygen Sensor part No.: 89466-48040 (for Atkinson cycle engines)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0133 (slow response): sensor poisoning failure, need to test fuel for sulfur content (Top Tier gasoline recommended)
P2196 (signal drift): silicon contamination, common after using poor quality sealant repair
What causes & How to repair
Urban congestion: frequent rapid acceleration leads to sensor diaphragm damage, it is recommended to clean the throttle regularly.
Coastal areas: salt spray corrodes the wiring harness connector, annual waterproof treatment is required.
​How much oxygen sensor cost to replace？
Original parts: 580-850
Sub-factory parts: 350-600

3.Lexus NX（incl.NX300/NX200t） O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-06050(for 2.0T Turbo, NTK Replacement No. 234-9111)
Downstream(Rear) Oxygen Sensor part No.: 89466-06050 (for direct injection)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0137 (low voltage signal): may be the oxygen pump module failure, need to use an oscilloscope to detect the signal waveform
P0430 (low catalytic converter efficiency): it is recommended to check the 3-way catalytic converter back pressure (standard value < 2psi)
What causes & How to repair
Driving in high altitude areas: air pressure changes lead to air-fuel ratio disturbances, sensor compensation needs to be recalibrated
Modification of the exhaust system: pipe diameter changes affect the sensor signal, need to use a special extension harness
​How much oxygen sensor cost to replace？
Original parts: 720-1050
Secondary parts: 450-750

4.Lexus IS（incl.IS350/IS250） O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-53010(for 3.5L V6, DENSO Replacement No. 234-9005)
Downstream(Rear) Oxygen Sensor part No.: 89466-53010 (for sport exhaust system)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0141 (High resistance in heating circuit): Commonly found in damaged wiring harness extrusion after modifying stringer shocks
P0172 (mixture too thick): need to check whether the carbon canister solenoid valve is stuck (standard resistance 30-50Ω)
What causes & How to repair
Track driving: high temperatures cause the sensor ceramic body to crack, it is recommended to use high temperature resistant coating protection
Frequent cold starts: It is recommended to warm up the car for 3 minutes before driving in low temperatures.
​How much oxygen sensor cost to replace？
Original parts: 680-980
Sub-factory parts: 420-700

5.Lexus GX (including GX460) O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-0C010(Fits 4.6L V8, NTK Replacement No. 234-9103)
Downstream(Rear) Oxygen Sensor part No.: 89466-0C010 (for AWD)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0132(High voltage signal): Possible poor contact between oxygen sensor and ECU ground wire.
P0420 (low catalytic converter efficiency): it is recommended to check the oxygen sensor heating cycle (standard 15 seconds to reach operating temperature)
What causes & How to repair
Desert off-road: sand and dust enter the sensor pores, it is recommended to install an air intake pre-filter
Driving in water: check the waterproof seal of the sensor plug (IP67 rating).
​How much oxygen sensor cost to replace？
Original parts: 850-1200
Secondary parts: 550-850

6.Lexus LX (including LX570) O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-0A010(fits 5.7L V8, BOSCH Replacement #17110)
Downstream(Rear) Oxygen Sensor part No.: 89466-0A010 (fits twin turbo system)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0136 (large signal fluctuations): it is recommended to check the exhaust manifold for cracks (common after intense off-roading)
P0170 (Fuel Correction Failure): Injector sealing needs to be tested (leakage < 1ml/min)
What causes & How to repair
Extremely cold areas: - 40°C freeze-proof sensors are recommended to avoid electrolyte freezing
Motorhomes: check the sensor harness for additional vibration stress.
​How much oxygen sensor cost to replace？
Original parts: 950-1300
Sub-factory parts: 600-900

7.Lexus LS (including LS500/LS600h) O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-54020 (fits 3.5T V6, DENSO Replacement No. 234-9025)
Downstream (Rear) Oxygen Sensor part No.: 89466-54020 (for multi-stage hybrid systems)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0139 (response time too long): may be the sensor internal pump battery aging, need to be replaced as a whole
P0420 (low catalytic converter efficiency): it is recommended to check the oxygen sensor heater fuse (located in the engine compartment fuse box)
What causes & How to repair
Business reception use: frequent short-distance driving leads to carbon buildup on sensors, regular high-speed pulling is recommended
High-end customized modification: matching the sensor installation angle is required when replacing the exhaust header.
​How much oxygen sensor cost to replace？
Original parts: 1050-1500
Sub-factory parts: 700-1000

8.Lexus RC (incl. RC350/RC F)O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-53020(for 2.0T inline-four, NTK Replacement No. 234-9115)
Downstream(Rear) Oxygen Sensor part No.: 89466-53020 (for Sport Catalyst)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0131 (low voltage signal): may be the oxygen pump voltage regulator failure, need to special diagnostic instrument detection
P0171 (mixture too thin): it is recommended to check whether the air filter is clogged (pressure drop > 5kPa need to be replaced)
What causes & How to repair
Track day events: track version of the sensor is recommended (resistant to temperatures up to 1000°C)
Modification of the air intake system: recalibration of the sensor compensation parameters is required
​How much oxygen sensor cost to replace？
Original parts: 750-1100
Sub-factory parts: 480-780

9.Lexus GS（含 GS350/GS200t） O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-48030(fits 3.5L V6, BOSCH Replacement #17109)
Downstream(Rear) Oxygen Sensor part No.: 89466-48030 (fits variable valve timing system)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0134 (no signal): check the sensor signal wire to lap resistance (should be > 10MΩ)
P0430 (low catalytic converter efficiency): need to check the oxygen sensor heater operating current (standard 3-5A)
What causes & How to repair
Mountain driving: severe bumps may cause the sensor to loosen, it is recommended to use anti-loosening adhesive fixation
Exhaust valve modification: pay attention to the airflow speed at the sensor installation location.
​How much oxygen sensor cost to replace？
Original parts: 620-900
Sub-factory parts: 380-650

10.Lexus UX (incl. UX200/UX250h) O2 sensor

​Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.：89465-06060(for 2.0L inline-four, DENSO Replacement No. 234-9011)
Downstream(Rear) Oxygen Sensor part No.: 89466-06060 (for hybrid system catalytic converter)
​​​​Defender Oxygen Sensor Fault Codes&Symptom Signs and Repair Recommendations
P0135 (heating circuit fault): need to check that the battery voltage is stable (cold start voltage > 10.5 V)
P0172 (too rich a mixture): it is recommended to check the fuel pressure regulator (standard 3.5-4.0 bar)
What causes & How to repair
Urban mobility: Recommended combustion chamber cleaner every 10,000 kilometers
Cold winter temperatures: drive more than 3 kilometers after cold start before accelerating sharply.
​How much oxygen sensor cost to replace？
Original parts: 550-800
Secondary parts: 320-550

Note: The above part numbers are based on European and American models:
The above part numbers are based on European and American models, and the rear oxygen sensor of hybrid models should be matched with the ECU.
Fault code diagnosis should be combined with real-time data flow analysis (focusing on STFT/LTFT values).
It is recommended to replace the sensor wiring harness plug at the same time (aging rate of about 30%).
It is recommended to use a professional diagnostic instrument to reset the learning value of the oxygen sensor after oxygen sensor related repairs, and to conduct a road test of at least 50km to prove it.

Provide for Lexus RX\ES\NX\IS\GX\LX\LS\RC\GS\UX good price O2 sensor OEM repair carparts and auto replacement accessories oxygen sensor