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Lambdapower - Lambda Oxygen sensors in the UK to trade and DIY international and special orders

UPDATED 26 February 2021

New product launch! Our own wideband oxygen sensor interface for industrial and commercial use. 12 volt version available right now, 24v and 0-20mA interfaces available on request. Read more and download a draft datasheet *** here ***.

Lead times, Please note, there is a backlog of LSM11B orders, delivery times are up to 2-3 weeks, with priority being given to pre-paid orders.

Courier Delays / Covid / Brexit

UK deliveries generally good, at worst two extra days for Royal Mail. Couriers (DPD) refusing to transport internationally because of Brexit-related backlogs seem OK now.

In general we use FedEx for USA and Canada; Brazil we are requesting industrial customers (only) use their own service at this time.

For Europe, domestic national postal services (post.fr, correo.es, poczta.pl, etc) are proving far more reliable so we are using them whenever possible.

European deliveries are taking up to 10 days.

Our office landline number is now deprecated, particularly during lockdown and home-working nobody seems to use it anymore, but it is still active. Please use mobile or email if possible. Some old paperwork may still have the landline printed on it.

COVID-19 statement

We are all getting used to lockdown restrictions and things are running fairly smoothly, but please note:

  • International orders are taking longer than usual
  • Special orders from the UK main warehouse take an extra 2 days
  • Special orders from the EU (some Bosch, some Denso) are subject to some delays
  • All manufactured items are cleaned as per relevant guidance before packing


Honda Accord F20B6 1999-2003 2.0 front pre-cat regulating lambda sensor

OEM DENSO Honda Accord lambda sensor for 1997cc 2.0i F20B6 145bhp engined models, years 1997-2003. No other sensor will work reliably with the F20B6. This part cures heater circuit malfunction and error codes caused by incompatible pattern parts.

Price is £169.99 all inclusive, free UK delivery. Save £50 on Honda dealership prices.

Update: Now includes exhaust sections, catalyser, front and rear sensors.

Click here for further details

Not your Honda? Know your OE part Number? Click here for lots of Honda cross references

Forester, Impreza 2.5 WRX, STi

Pre-cat Oxygen sensor for 2.5 models, genuine Denso

Denso have updated this sensor, moving from the old blue sheath / grey connector design to a new Yellow connector and cable. The older type is being discontinued.

  • New design, pre-cat sensor for various Subaru 2.5 models
  • Replaces 22641AA211, 22641AA32A, 22641AA490
  • Price is cheaper by 15% compared to previous sensor

Please click here for details.

If you have a different subaru, see this list instead (long list, might take a while to load)

> > OBD-II fault code search

Input your P-codes right here! Click in the box, type, then press GO

>> Lambdapower Part Numbers

To search for our own part numbers, LP- or LC- style, please click in the box, type, and press 'GO'


Lambda Sensor Bosses and blanking Plugs / Bungs

Lambda mounting bosses and blanking plugs, plus our new thru-hole mounting boss, ideal for smokestack / chimney mounting of M18 lambda sensors without having to weld. Prices include postage. See this page for details


22mm Lambda Sensor Socket

Professional Quality 22mm Lambda Oxygen Sensor socket, available in standard reach and extra-long reach. Suitable for all standard form-factor 22mm hex Zirconium and Titanium sensors. 3/8 inch drive. For details click here.

Very Quick Guide to Lambda Sensors

A lambda sensor is an electronic sensor that fits into the exhaust system. It is sometimes called an Oxygen sensor, O2 sensor, or AFR. Its purpose is to send a signal to the ECU to indicate how much oxygen is in the exhaust gases. This in turn indicates how efficiently the engine is running. The ECU uses this information to adjust the engine's fuelling as you drive.

What happens if it fails?

MOT emissions failure, excessive fuel consumption, catalyst failure, poor performance, engine check warning light, fault codes are all symptoms that can be associated with Lambda sensor failure. The Lambda sensor's efficiency deteriorates over a period of time.


No maintenance of the Lambda sensor is required and there are no serviceable parts. Similar to a spark plug, when it's worn out it should be replaced.

Where is it?

Mounted on the engine exhaust manifold or exhaust pipe, or under the vehicle for the rear sensor. Modern engines (2005->) with a close-coupled catalyst have the sensor inside the engine compartment.

Cars made after year 2000 have at least two sensors, front and rear, and are termed OBDII compliant. Multiple sensors enable the ECU to better judge the efficiency of individual cylinders.

How can I replace it?

Firstly consult our fitting guide - it's roughly the same as fitting spark plugs. Or get your garage to do it. Some garages will not fit 'universal' type sensors, please check with them first if buying one.

Use the green button to search for your car step-by-step
We specialise in all types of Lambda Sensors. Call or email if you need assistance!

Please email or phone 07806 705407 if you are having difficulty finding the parts you need.


Lambdapower AD-12 wideband sensor interface

NEW! December 2020! We are pleased to announce our new Lambdapower AD sensor interface. Please see the biomass page for details, and more to come soon.

LSM-11 Supercession parts are still available. Our LSM11B sensor is no longer being produced but we have stock enough to last another few months. A supercession to that part is in turn being developed (LSM11F). See our biomass page for details.

Our Lambdapower branded LC69001 LSU4.9 replacement oxygen sensor (made by BOSCH) is always available from stock for fast delivery. Suits Froling TM320, Stoker, and others. See our biomass page for details.


NOX sensor for FSi models and EGT sensors

NOX sensors for Volkswagen FSi models. Cures DTC 17443 and P1035 Emissions Warning Sensor fault codes

Other VW resources

VW VR6 (click for list) and R32 (click for list) sensors, part of our legacy "Classic Line" range of VW parts. Diagram: Bank finder, VR6 bank numbering, VR6 cylinder number diagram for VR6's with two exhaust manifolds & four sensors

Need an exhaust gas temperature EGT sensor? New stocks of VAG 03L906088 series, BMW 11787557705, FORD/VOLVO 12B591 AA 12B591 BA 12B591 CA 12B591 DA, RENAULT 8200 and 8201 series. New EGT webpage coming soon, in meantime contact us for details!

OEM Crossrefs

Not your car? ** Please click here to start your vehicle search **
Do you have the OEM part number? Click here to search for it
Send us an Email with car details and Reg Number
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Universal Lambda Sensors from £29.99

Revised and extended range! If in doubt which one you need, please contact us. See all our universal sensors here

Dynojet Rolling Road Sensors

Click for more info!

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Diagnostic & Fitting Advice and Technical Procedures are for information only and no liability is implied therein. All site content, text, images, and application lists are copyright ©2003-2021 Lambdapower and no reproduction of any material is allowed in any form without our written consent. E&OE
Registered Office: Unit 22A Baltic Works, SHEFFIELD, S9 3QA. 07806 705407. CEO Jamie Field. UK VAT Reg No. 131050672 All rights reserved.