- Interior
- 450 Dashboard Removal 450 Door Speaker Pockets 450 Mirror Too Low 450 Roof Panel Trim Removal 450 SE Drive Cover 450 Speedo Removal 450 Stalk Removal 451 Blower Motor Removal 451 Boot Divider + 451 Boot Side Removal 451 Boot Switch Change 451 Control Stalk Removal 451 Glasses Holder 451 Heated Seat Retrofit 451 Heater Resistor Pack 451 Interior Handle Removal 451 Lower Dash Removal 451 Mirror Too Low 451 Rear Squirter Fault 451 Roof Trim 451 SE Drive Cover 451 Speedo Disassemble 451 Speedo Removal 451 Storage Flap Faults 451 Storage Flap Removal 451 Sun Blind 454 Changing The Dials Acrylic Items Add A Button Airbag Removal Aluminium Decorative Parts Boot Side Panel Removal Brabus Handbrake Grip Fitting Brabus V6 Steering Wheel Fitting Carbon Fibre Effect Dash Instrument Surrounds Changing the Speedo Dial Dismantling the Roadster hardtop DIY Floor & Boot Mats DIY Handbrake Gaiter Door Handle Cable Repair Fitting Roadster Dials Force Open The 451 Hatch Glove Box Insert Removal Glove Box Retrofit Halfords/Ripspeed Handbrake Sleeve Heater Control Sliders Hyper Reclining 451 Seats Ignition Barrel Removal Installing Interior LEDs And Bulbs Leather dashboard, door cards, seats Leather Door Pockets Leather-trimmed Door Handles LHD/RHD Seat Swapping Lounge Concept Seats Lowline Drawer Removal Luggage Cover MDC Armrest Fitting Metal-Monkey Custom Dials MP3 Player Holder Neoprene Drawer Lining Paddle Shift Paddleshift DIY Painting With Nail Varnish Professional Window Tinting Rear rattle fix (city/fortwo) Roadster AC Drain Roadster Carpet Removal Roadster Door Card Removal Roadster Handbrake Replacement Roadster Rear Window Rattle Fix Roadster Speedo Removal Roadster Stalk Removal Roadster Trip Computer Safety Triangle Removal SE Drive Removal Seat Cover Removal Seat Height Handle Fault Seat Information Seat Removal Seat Removal 451 Side Dash Removal Snapped Mirror Adjuster Sound Deadening Starter Button Sunglasses Holder Tinting Plastic Windows Underseat Drawer V6 Steering Wheel Disassembly Wiper Rear Cover Removal
- Exterior
- 2012 Facelift Retrofit 450 Cabrio Roof Fix 450 Fog Light Bulb Change 450 Headlight Bulb Change 450 Headlight Removal 450 Mud Flaps 450 Rear Window Leaks 451 AC Radiator Removal 451 Crash Bar Removal 451 Door Glass Removal 451 Door Quarter Glass Removal 451 Front Frame Removal 451 Fuel Filler Flap Removal 451 Handle Removal 451 Headlight Change 451 Headlight Removal 451 High Level Brake Light 451 Mud Flap Fitting 451 Poly Sway Bar Bushes 451 Rear Hatch Dripping 451 Rear Light Removal 451 Removing The Mirrors 451 Smann Rear Spoiler 451 Smann Side Skirts 451 Spoiler Removal 451 Towbar Fitting 451 Upper Dash Removal 451 Wheel Bearing 451 Wing Mirror Caps 451 Wiper Mechanism Removal Angel Eyes 450 Angel Eyes 451 Applying Vinyl Logos Arch Extensions Axle Caps Base Rack Fitting Black Headlights - Almond Black Headlights - Peanut Blind Spot Mirror Boot Liner Removal Brabus 450 Side Spats Brabus Front Splitter Brabus Front Splitter Fitting Brake Disc Types Cabrio Rear Window Fix Changing A Wishbone Cleaning Your Smart Colour Coding Cubic Printing The Easy Way Debadge 2012 Facelift Debadge Your Smart Car DIY 451 Brabus Headlights DIY Air Intake Door Seal Drain Reinforcement Evilution Vinyl Logos Exhaust Cleaning Exhaust Valance DIY Extra Reflectors Fast Filler Cap Filler Flap Removal Filler Neck Flange Fit New Brake Discs Fitting 451 Foglights Fitting Braided Brake Hoses Fitting Brake Hoses Fitting Brake Pads Fitting Brake Pads 451 Fitting Bullbars Fitting Fog Lights 450 Fixing The Rear Panel Clips Forfour Foglight Change Forfour Rear Bearings Fortwo Rear Bulb Change Gas Strut Removal Handbrake Cable Removal Headlight Eyebrows Headlight Scratch Repair High Level Brake Light LED Rear Lights MDC Filler Cap Cover Fitting Mesh And Fit An Aftermarket Grill. Michalak Sucker Number Plate Lights 451 Painted Roadster Lower Lights Removing 451 Side Skirts Removing the Wing Mirrors Removing Wing Mirror Glass Replace Side Repeaters Replace The Roof Replace The Wheel Bearings Roadster Bonnet Removal Roadster Exterior Water Channels Roadster Headlight Protectors Roadster Headlight Removal Roadster Light Cover Tabs Roadster Mirror Removal Roadster Rear Bulb Change Roadster Rear Light Removal Roadster Rear Roof Leak Roadster Remote Bonnet Pop Roadster Roof Drain Spout Roadster Roof Not Closing Roadster Sagging Doors Roadster Steering Rack Bushes Roadster Sway Bar Bushes Roadster Tridion Paint Cracks Roadster Wing Mirror Leaks Roof Bar Colour Change Scoop Fitting Screen Washer Faults Sideskirt fitting Smart Lights Smart Mirrors with Indicators Smooth Rear Wiper Track Control Arm Bushes Undertray Lowering Update The 451 Headlights Valance Removal Vertical Wiper Mod Vinyl Wrapping Windscreen Wiper Replacement Wing Mirror Replacement Glass Wiper Arm Washer Jet
- Electrical
- 12 Volt Car Battery 12V Rear Socket 450 Brake Light Switch 450 Fortwo Earth Upgrade 450 Horn Fault 450 Upgrade Horn 451 Boot Light 451 Boot Release Button 451 Brake Light Switch 451 Button Bank LEDs 451 Cruise Control 451 Dash Pod LEDs 451 Dash Pods 451 ESP Removal 451 Foglights/DRL Mod 451 Fortwo Earth Upgrade 451 Headlight Disassembly 451 Heater Controller LEDs 451 Horn Upgrade 451 OEM Navigation 451 Passenger Airbag Disable 451 Pod Swap Over 451 Speedo LEDs 451 Stereo LEDs 451 Towbar Electrics 451 Underseat Bass Unit 451 Window Switch LEDs Airbag Connector Maintenance Airbag Connector Replacement Alternator Testing Auto Drive Lock Info Brake Switch Test Cornering Lights Cruise Control on the smart Dash Pod Clock Fault Daytime Running Lights MDC Disabling the Yaw Sensor. DIY Car Tracker ECU Connections Extra Window Switch Find The OBD Socket Fitting HIDs Flashing Yellow Triangle Footwell Lights For2 SMD LEDs For2 Trip Computer For4 Fuses And Relays Forfour Earth Upgrade Forfour SMD LEDs Front Splitter Fitting Fuel Cap Solenoid Fuse Types and Sizes Handbrake Switch Headlight Adjustment Heated Seats - Retrofit Heater Blower Failure Heater Control Lighting Ignition Free Electric Windows Ignition Light Inaccurate Rev Counter Jump Start Your Smart KM to Miles LED High Level Brake Light Licence Plate Lights Light Stalk Fix MDC Cruise Control MHD ECO Off At Start MHD Starter/ECO Fault MP3 Lead Noisy Headlight Motors OBD Connections OBD Upgrade OBDII Error Codes Rear Light Wiring Remap DIY Retrofit Electric Mirrors Reversed Gearchange Roadster Brake Light Switch Roadster Dash Pod Lighting Roadster Earth Upgrade Roadster H7 Bulb Connectors Roadster Heater Selector Fix Roadster Heater Switch Roadster Horn Fault Roadster Island SMD LEDs Roadster Pods Roadster Pods In A For2 Roadster Roof Override Roadster Speedo in a For2 Roadster Speedo SMD LEDs Roadster Stereo SMD LEDs Roadster Switches SMD LEDs Roadster Trip Computer SMD LEDs Roadster Wiper Motor Sealing SAM Fuse Holder SAM Unit (Fuse Box) SAM Unit 451 SE Drive (Gear Stick) Seat Belt Reminder Alarm Side Repeater Removal Steering Wheel Removal The Ignition Switch Turn The ESP Off Turning The DRLs On And Off Warning Symbol Modification Waterproofing The SAM Unit Window Switch SMDs Wires Though The Bulkhead X-Gauge Features ZEE Unit (Fuse Box)
- Engine
- ≡ On The Speedo ≡ On The Speedo 451 1 Line On The Speedo 451 Euro4 Exhaust Retrofit 451 Lambda Sensors 451 N/A Exhaust Fitting 451 N/A TIK Removal 451 Spark Plug Specs Add Auto/Softouch Air Locks Alternator Remove/Repair Basic Smart Engine Diagram Brabus Style Engine Plate Brake Fluid Level Breather Pipes Checking the Oil Level Clutch Adjustments Coil Pack Removal Coolant Level Checking Cylinder Head Bolts Delip the Air Intake Digital Boost Gauge in a Standard Pod Dipstick Tube Replace Driveshaft Seals Dump Valve Fitting Dump Valve Types Ein DV Kaufen Electric Superchargers Engine Reconditioning Excessive Oil Use Exhaust Fitting Fit A Boost Gauge Fit A Cycle Valve Fitting New Reluctors Forfour Belt Tensioning Forfour Engine Cover Forfour Throttle Body Clean Fuel Filter and Tank Fuel Pressure Regulator Fuel Saver Magnets Gearbox Fluid Change Getrag Gearbox Intercooler Fault Janspeed Stainless steel Intercooler Pipes Larger Throttle Body Loose Wastegate Arm Lowering The Engine Mocal Intercooler Pipes Oil Adapter Fitting Oil Catch Tank Oil Coolers Oil Filter Adapter Oil Filter Magnets Oil Sump Pan Change Oxygen Sensor Paint Your Driveshafts Performance Air Filters Performing A Compression Test PiperX Induction Piston DV Servicing Push/Bump Start Your Smart Replace The Driveshafts Retrofit a Charge Cooler Roadster Fuel Pump Change Sequential DV Servicing Servicing The Clutch Actuator Sila 451 Induction Kit Smart Specific Dump Valve Starter Motor Removal Starter Motor Repair The Camshaft Thermostat Sensor Change Throttle Body Fix TIK Pipe Information TIK Pipe replacement Top Breather Pipe Replacement Trust/Trust+ Removal Turbo Types and Differences Wastegate Actuator Hoses Water Pump Change
- X-Gauge
- Panels
- 450 Boot Panel Removal 450 Door Panel Removal 450 Front Panel Removal 450 Grill Removal 450 Rear Panel Removal 451 Bonnet Opening 451 Boot Panel Removal 451 Door Panel Removal 451 Front Panel Removal 451 Grill Removal 451 Panel Separation 451 Rear Panel Removal 451 Rear Side Quarters 451 Scuttle Panel Removal 451 Valance Removal 452 Coupe Glass Removal Door Card Removal 450 Roadster Door Panel Removal Roadster Exhaust Valance Roadster Front Panel Removal Roadster Hardtop fitting kit Roadster Rear Panel Removal What Panels Fit What
- Wheels
- 3 to 5 Stud Adapter Fitting 450 3to5 Stud Converters 451 Suspension Front 451 Suspension Rear Alloy Wheel Protectors Arch Liner Removal Changing the wheels on your smart Heavy/Stiff Steering Jacking Up A Smart Locking Wheel Nuts PCD and Offset Explained Powder Coating or Painting Alloys Repairing Reluctors Roadster 3to5 Stud Adapters Smart Standard Wheels and Offsets Spare Wheel Suspension Change Front Suspension Change Rear Tyre Sealant And Puncture Prevention Tyre Sealant Application Tyre Sizes Explained UJ Maintenance Wheel Alignment Settings Wheel Bolt Key Storage Wide Front Tyres
- I.C.E
- 3rd Party Head Unit Fitting 450 & Roadster Stereo Removal 450 Dash Speaker Upgrade 450 Door Speakers 451 Door Speakers 451 Double DIN Stereo 451 MP3 Lead 451 Speaker Upgrade 451 Standard Tweeters 451 Stereo Removal 454 Stereo Removal Aerial Modifications Becker Sat Nav Boot Hatch Speakers Brabus Sub Fitting CD Changer Fitting Debadge the Stereo Fitting the Sound Chip Grundig CD Mode Grundig Display Info Grundig Expert Settings Grundig Face Info Grundig Radio Info Grundig Security Grundig Sound Settings Grundig Sound Upgrade Activation Grundig Stereo Difference Highline DVD Handbrake Bypass Highline Security Code Installing An Active Sub Mass Music Storage Omnifi Fitting Parcel Shelf For Speakers Roadster Speakers Sat Nav Speed Pulse Stereo Connections Under Seat Bass Boxes Visteon Radio 9 & 10 Volume Knob Replacement
- Servicing
- 450 Air Con Re-Gas 450 Cabin/Pollen Filter 450 Engine Oil Change 450 Service Schedule 451 Air Con Re-Gas 451 Air Filter Change 451 Cabin/Pollen Filter 451 Fog Light Bulb Change 451 Keyfob Battery 451 Oil Change 451 Service Schedule 451 Spark Plug Change 451 Suspension Noise Air Filter Change Applying Rain-X Battery Removal Battery Upgrade Bleeding The Brakes Cabrio Roof Tension Canister Oil Filters Car Battery Maintenance Changing Interior Bulbs Clean Your Air Conditioning Coolant Draining/Filling Door Handle Maintenance Filling The Windscreen Washer Tank Forfour Spark Plug Specs Handbrake Adjustment Oil Specifications Rear Drum Brake Cleanout Reset The Service Indicator Roadster Air Con Re-Gas Roadster Cabin/Pollen Filter Roadster Engine Oil Change Roadster Front Bulb Change Roadster Handle Maintenance Roadster Lower Light Access Roadster Sparkplug Fitting Rubber Seal Care Seat Belt Replacement Spark Plug Removal and Replacement. Suprex Oil Filter Change The Key Battery Tyre Pressures and Fuel Wastegate Servicing Window Height Adjustment Wiper Sizes
- Misc
- Basics
- 450 Dash Pods 451 Luggage Cover Adjusting The Mirrors Adjusting The Seats Adjusting The Windows Air Conditioning Cabrio Roof Info Console Add Ons Driving And Starting Essential Tools Fog Lights Usage Heaters Indicators Interior Lights Locking And Unlocking Opening The Boot Safety Triangle Seat Belts Storage Sun Visors Towing Trip Computer Using The Heater Using The Lights Using The Wipers Warning Lights
- Info
- 450 Air Conditioning Drain 450 Headlight Disassembly 450 Leaks 451 Climate Control Faults 451 Diesel Remapping 451 Petrol Remapping 600cc Fuse Layout 700cc Fuse Layout 999cc Fuse Layout Acronyms And Smart Words Airbag Light On American 451 Turbo Kits Axle Stands Baby Seats Broken Keyfob Plastic Bulbs list Cabin Air Intake Drain Cabrio Windscreen Tabs Calculate Your MPG Chargecooler Fluid Info Checking ABS Reluctor Rings Cleaning Silicone Pipes Cold Air Feed Or Not? Common Questions Detailing Your Smart Diagnosis Hardware & Software Dim/Dead Headlights Driving/Moving Abroad Dump Valves - are they a worthwhile mod? Euro Emissions Standards Euro/UK Light Adjustment Fuel Saving Techniques Gear Knob Removal Gear Ratios Grundig Radio Code Guide to smart Mks How Do I Use The Site Indicators Flash 9x Injector Specifications Insurance Key Blanks Key modifications Laying A Car Up Leak Detection Leaking Windscreen Leaks - Roadster Links - Community Links - Companies Locking Info London Congestion Charge Lower And Remove The SAM Mercedes Workshop Software No Alignment Wheel Change Not Selecting Reverse Official Roadster Leak Guide Owners Manual P0410 OBD Error Paddles Stopped Working Part Numbers Power Steering Fault Presspley Crack Investigation Remove The Airbox Replacement Lambda Sensors Rev Counter WTF Riveting Road Tax Cost Roadster Alloys On A Fortwo Roadster Fuse Layout Roadster Stalk In A Fortwo Safe Mode SAM Unit Connections Scratch Removal Sensors (Suprex) smart City Cdi (Canadian) Fuse Layout Smart Fonts Smart Industries Map Smart Paint Codes Smart Servicing Specific Error Codes Splicing Into Wires Sprint/Speed Booster Steering Angle Sensor Alignment Steering Wheel Disassembly Suspension Layout The Everything Search The New Smart 451 The smart's Central Display The UK MOT Test Throttle Body Reset Tips & Tricks Torque settings for fortwo, forfour and roadster Touch Up Paint Turbo Manifold Crack Test Turbo Manifold Cracks Tyre Dimension Information Vehicle Identification Number VIN Venturi Effect What Smart Do I Own Where To Buy Smart Parts Wrapping The Loom ZEE or SAM Fuse Box?
- Reviews
- 451 PiperCross Filter Aluminium Hand Brake Button Aquapel Auminium Gear Knob Custom Cupcakes Decorative Wheel Bolt Caps Forge 451 NA TIK Forge DVIC Forge Intercooler Pipes Forge TIK Pipe Ipod Amplifier/Charger K1 Speed Camera Detector Mocal I/C Pipes Review Sila Induction Kit Review SmartMods HT Leads Trust/ESP Deactivation Plug Viper Induction Kit X-Gauge
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Modification Details
451 Lambda Sensors
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£80 each
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451 Lambda Sensors
These sensors measure the air/fuel mixture ratio and adjust the engine parameters. If either of these are faulty you can have an engine light on, poor running or bad mpg.
These sensors measure the air/fuel mixture ratio and adjust the engine parameters. If either of these are faulty you can have an engine light on, poor running or bad mpg.
The upstream sensor is located in the exhaust manifold.
The downstream lambda sensor is located in the middle of the exhaust can.
Follow the wiring to the connections and disconnect before undoing the sensors.
These can both be removed using a 22mm spanner and they spin out in an anticlockwise direction. It is always a good idea to spray them with PlusGas before removal to free them a bit.
Also, a dab of copper grease can save them from seizing up next time.
On refitting, retighten the sensors to 40Nm if you have the correct tools.
If not, just make sure it is tight, you don't need to swing on the spanner though.
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