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Car Lambda sensor

O2 sensor from leading manufacturers

  • BOSCH lambda sensor catalogue
  • FEBI BILSTEIN lambda sensor catalogue
  • SKF lambda sensor catalogue
  • NGK lambda sensor catalogue
  • VALEO lambda sensor catalogue
  • TOPRAN lambda sensor catalogue
  • SWAG lambda sensor catalogue
  • METZGER lambda sensor catalogue
  • JP GROUP lambda sensor catalogue
  • JOHNS lambda sensor catalogue
  • HELLA lambda sensor catalogue
  • JAPANPARTS lambda sensor catalogue
  • DENSO lambda sensor catalogue
  • DELPHI lambda sensor catalogue
  • MEAT & DORIA lambda sensor catalogue
  • VEMO lambda sensor catalogue
  • BERU lambda sensor
  • BLUE PRINT lambda sensor
  • HERTH+BUSS JAKOPARTS lambda sensor
  • MAGNETI MARELLI lambda sensor

Your Lambda sensor worn out? » Read more about common malfunctions • Repair • Replacement manual

Small component, huge effect

The lambda sensor, alternatively called oxygen sensor, may not be a very big component, but it carries a lot of responsibility for engine performance and efficiency; as only with the correct measuring values the mix of fuel and air is correctly composed. Ignoring malfunctions not only does make you an environmental criminal, because the exhaust values no longer are within the acceptable norm; furthermore, it is economically detrimental as the engine needs considerably more fuel.

Facts about the lambda sensor in an overview:

Where is the oxygen sensor situated?

  • The lambda sensor or oxygen sensor sits in a bracket at the bottom of the car directly in front of the catalytic converter. A sensor can be placed behind the converter as well. This would be a diagnostic sensor. In some cars it has some kind of housing, but generally it lies free and can be easily spotted.

How does it function?

  • The sensor sits directly in the exhaust flow which is guided through a zirconium membrane and a Nernst cell (named after Walther Nernst). The amount of oxygen molecules is compared to the actual environmental air to determine the proportion of combustion air. This value is called "lambda value" in professional terms.

What happens in case of a defect?

  • First, the fuel consumption rises and the engine performance deteriorates.
  • Initially possibly imperceptibly, gradually stronger and stronger.
  • The engine regularly stutters or stalls.
  • If the proportion is no longer accurate, the engine check light goes on.
  • In extreme cases the engine stalls or can only be started with difficulty.

Possible causes

  • Most oxygen sensors sooner or later suffer from general material ageing. Particles clog the membrane and the Nernst cell, and the measuring performance falls.
  • Mechanical stress can destroy the lambda sensor as well if the car bounces too deep.
  • Electric damage through short circuit of a defective cable can completely disable the sensor.

To the garage or DIY replacement?

  • In older cars until halfway the first decade of 2000 DIY replacement is possible, provided a ramp or hoist is available.
  • In modern cars you need a special ring-shaped connection or the cable must be cut and re-connected at assembly.
  • Upon installation a visit to the garage is required to have the fault memory deleted and the software initialised.

Still driving with a defective lambda sensor

If you still manage to ignore the symptoms (which is difficult) and continue driving with a defective lambda sensor, you might be in for a nasty surprise at a possible traffic control or MOT inspection, as a car is only fit for traffic if exhaust values are within the acceptable levels. If deliberate negligence can be proven, fines for tax evasion are possible.

Differences between spare parts

Two different versions are currently available on the market and used by car manufacturers:

  • The conventional (zirconia) lambda sensor uses the electric voltage change to measure the remaining oxygen. The probe needs an operating temperature of approximately 350ᵒC. Its measuring spectrum is rather small and not suitable for all engines.
  • The wideband sensor is the modern version of the lambda sensor. Its measuring spectrum is wider and the sensor is suitable for petrol, diesel and even gas engines. Modern cars often have several of these wideband sensors (differential measurement) installed.

Both probes can be either a finger-shaped or a planar probe. The former is a bit sturdier as its housing often has a protective tube, protecting the sensor against combustion residue and condensing moist. The latter heats up more quickly, but is less sturdy on the other hand.

What costs can you expect?

As a driver you hardly have any influence on the life span of the lambda sensor and you have to fall back on the manufacturer's specifications. For cheap products they lie at approximately 160.000 driven kilometres, for high-quality spare parts - at c. 250.000 kilometres. The price spectrum is equally wide, starting at 50 EUR (c. £45) reaching up to 100 EUR (c. £90). Choosing for a premium product allows you to considerably reduce exhaust values and fuel consumption. If you consider the price too high, we invite you to have a look in our shop. Here you find all kinds of lambda sensors for all cars at prices which lie lower than the recommendations of manufacturers.


Car lambda sensor : best-selling products
Lambda sensor
RIDEX 3922L0576 oxygen sensor
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 440
  • Number of pins: 4
  • Number of circuits: 4
  • Connector Shape: rectangular
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0576 RIDEX replacement car lambda sensor price
RIDEX | 3922L0576
£ 30,61
(Price per item)
Condition:  new
Lambda sensor
NTY ESL-AU-005 o2 sensor
  • Oxygen Sensor: Regulating Probe, Thread pre-greased
  • Fitting Position: before catalytic converter
  • Overall Length [mm]: 1010
  • Number of circuits: 4
  • Fabrication Number: ESL-AU-005
  • Condition:  new
ESL-AU-005 NTY replacement car lambda sensor price
NTY | ESL-AU-005
£ 30,51
Condition:  new
Lambda sensor
BOSCH 0 258 003 477 nox sensor
  • Overall Length [mm]: 320
  • Number of circuits: 4
  • Recommended change interval [km]: 160000
  • Available as universal article as well, see article no.: 0258986505
  • Condition:  new
0 258 003 477 BOSCH replacement car lambda sensor price
BOSCH | 0 258 003 477
£ 60,46
Condition:  new
Lambda sensor
RIDEX 3922L0091 lambda sensors
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 620
  • Conductor Number: 4
  • Number of connectors: 4
  • Connector Shape: D Shape
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0091 RIDEX replacement car lambda sensor price
RIDEX | 3922L0091
£ 40,66
Condition:  new
Lambda sensor
RIDEX 3922L0095 exhaust sensor
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 480
  • Number of pins: 4
  • Number of connectors: 4
  • Connector Shape: rectangular
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0095 RIDEX replacement car lambda sensor price
RIDEX | 3922L0095
£ 28,93
Condition:  new
Lambda sensor
BOSCH 0 258 986 602 oxygen sensors
  • Number of circuits: 4
  • Recommended change interval [km]: 160000
  • Connector/Clamp: Connector may need adjustment
  • Condition:  new
0 258 986 602 BOSCH replacement car lambda sensor price
BOSCH | 0 258 986 602
£ 42,08
Condition:  new
Lambda sensor
RIDEX 3922L0422 lambda probe
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 275
  • Number of pins: 4
  • Number of circuits: 4
  • Connector Shape: rectangular
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0422 RIDEX replacement car lambda sensor price
RIDEX | 3922L0422
£ 29,16
(Price per item)
Condition:  new
Lambda sensor
RIDEX 3922L0072 lambda sensor
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 300
  • Conductor Number: 4
  • Number of connectors: 4
  • Connector Shape: rectangular
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0072 RIDEX replacement car lambda sensor price
RIDEX | 3922L0072
£ 29,16
(Price per item)
Condition:  new
Lambda sensor
RIDEX 3922L0287 oxygen sensor
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 1600
  • Number of pins: 4
  • Number of circuits: 4
  • Connector Shape: D Shape
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0287 RIDEX replacement car lambda sensor price
RIDEX | 3922L0287
£ 29,16
(Price per item)
Condition:  new
Lambda sensor
NTY ESL-AU-007 o2 sensor
  • Oxygen Sensor: Diagnostic Probe, Thread pre-greased
  • Fitting Position: after catalytic converter
  • Fabrication Number: ESL-AU-007
  • Condition:  new
ESL-AU-007 NTY replacement car lambda sensor price
NTY | ESL-AU-007
£ 32,28
Condition:  new
Lambda sensor
RIDEX 3922L0228 nox sensor
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 225
  • Number of circuits: 4
  • Supplementary Article / Supplementary Info Info 2: without plug
  • Connector/Clamp: Connector may need adjustment
  • Technical Information Number: Universal
  • Supplementary Article / Supplementary Info: with cable tie, with fastening/mounting material
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0228 RIDEX replacement car lambda sensor price
RIDEX | 3922L0228
£ 35,46
(Price per item)
Condition:  new
Lambda sensor
RIDEX 3922L0229 lambda sensors
  • Oxygen Sensor: Heated
  • Thread Size: M18x1,5
  • Cable Length [mm]: 480
  • Number of circuits: 4
  • Supplementary Info: Universal
  • Supplementary Article / Supplementary Info Info 2: without plug
  • Connector/Clamp: Connector may need adjustment
  • Supplementary Article / Supplementary Info: with squeeze connector, with fastening/mounting material
  • Line insulation design: with silicone-coated woven-fibre insulation
  • Condition:  new
3922L0229 RIDEX replacement car lambda sensor price
RIDEX | 3922L0229
£ 34,24
Condition:  new