Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.
Search parts
WQT100030LG - Inertia switch Electrical Part Land Rover Range Rover Defender, Discovery, Freelander 1, Range Rover

WQT100030LG - Inertia Switch

- €51,40
€51,40
€51,40 - €51,40
€51,40
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Inertia Switch in the fuel supply and engine electrical circuit. It cuts electrical power to the fuel pump on a sudden impact or severe deceleration, stopping fuel delivery after a collision.

Once tripped, the switch is reset manually by pressing its plunger.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Land Rover Discovery 2 1998-2004 (L318)
Land Rover Freelander 1 1996-2006 (L314)
Range Rover Classic up to 1994
Range Rover Classic 1994-2001 (P38)
Fitment Notes DEFENDER 1987 - 2006 Sensors 2.5L 5 Cyl L/R Turbo Diesel
DEFENDER 1987 - 2006 Sensors 4.0L V8 L/R EFI Petrol
DISCOVERY 1 1989 - 1998 (From FA393361 to WA799999) CLASSIC ECU-Fuel Control Petrol V8 L/R EFI,V8 EFI (V)MA081992
DISCOVERY 1 1989 - 1998 (From FA393361 to WA799999) CLASSIC ECU (V)MA081992
DISCOVERY 1 1989 - 1998 (From FA393361 to WA799999) CLASSIC Sensors (+)"CDN/MEX/USA" (V)TA163100
DISCOVERY 2 1998 - 2004 CLASSIC ECU - Engine Management With Diesel Engines
DISCOVERY 2 1998 - 2004 CLASSIC ECU - Engine Management With Petrol Engines
FREELANDER 1996 - 2006 CLASSIC ECU - Engine Management With Diesel Engines
FREELANDER 1996 - 2006 CLASSIC ECU - Engine Management With Petrol Engines
FREELANDER 1996 - 2006 CLASSIC Sensors 2.5 KV6 Petrol,Automatic Transmission
RANGE ROVER 1994 - 2001 CLASSIC ECU - Engine Management 4.0L V8 L/R Petrol,4.6L V8 L/R Petrol
RANGE ROVER 1994 - 2001 CLASSIC ECU - Engine Management (+)"CDN/MEX/USA",4.0L V8 L/R EFI Petrol,4.6L V8 EFI L/R Petrol,LHD
RANGE ROVER 1994 - 2001 CLASSIC Sensors 4.0L V8 Efi Petrol LC,4.0L V8 L/R EFI Petrol,4.6L V8 EFI L/R Petrol,4.6L V8 Efi Petrol LC
RANGE ROVER CLASSIC 1992 - 1994 (From JA610294) CLASSIC Relays-Under Seat-From (V) MA647645
Alternative Codes
WQT100030LWQT100030LGWQT100030LES

In stock 2 units
1 · Gouda 1 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the inertia switch do?
The inertia switch cuts electrical power to the fuel pump on a sudden impact or severe deceleration, stopping fuel delivery after a collision. It sits in the fuel supply and engine electrical circuit as a safety cut-off. Fitted across Defender, Discovery 1 and 2, Freelander 1, Range Rover Classic and P38.
How do I reset the inertia switch after it's tripped?
Reset the inertia switch by pressing its plunger back down by hand. Once tripped after an impact or jolt, it stays open and won't let the fuel pump run until it's manually reset. No tools are typically needed.
Which vehicles does this inertia switch fit?
This inertia switch fits the Defender, Discovery 1 and Discovery 2, Freelander 1, Range Rover Classic and Range Rover P38. It's used on both petrol and diesel engine management setups. Use your VIN to confirm the switch matches your vehicle's build.

Frequently Bought With

Products most often purchased alongside this one.

16 items
346849 - Bonnet Hinge Bush
Aftermarket

346849 - Bonnet Hinge Bush

€1,50 excl. VAT
MXC1800X - Door Casing Trim Clip – 100 Pack
OEM

MXC1800X - Door Casing Trim Clip – 100 Pack

€57,40 excl. VAT
GA1139 - Bumper Bolt Set – Stainless Steel
Aftermarket

GA1139 - Bumper Bolt Set – Stainless Steel

€16,00 excl. VAT
LR077684 - Rear door seal RH 110
Aftermarket

LR077684 - Rear door seal RH 110

€32,00 excl. VAT
LR077683 - Door Seal – Rear – LH
Aftermarket

LR077683 - Door Seal – Rear – LH

€32,00 excl. VAT
MXC4738PMA - Door Lock Button Escutcheon
OEM

MXC4738PMA - Door Lock Button Escutcheon

€2,40 excl. VAT
NRC2211 - Clutch Hose
Aftermarket

NRC2211 - Clutch Hose

€17,20 excl. VAT
PRC8876 - Flasher Relay – 4-Pin
Aftermarket

PRC8876 - Flasher Relay – 4-Pin

€12,70 excl. VAT
RHF500110 - Upper Link Ball Joint – Rear
Aftermarket

RHF500110 - Upper Link Ball Joint – Rear

€19,00 excl. VAT
STC3435 - Swivel Housing Grease – One Shot Sachet
Aftermarket

STC3435 - Swivel Housing Grease – One Shot Sachet

€11,90 excl. VAT
TAR100050 - Swivel Pin Kit – ABS
Aftermarket

TAR100050 - Swivel Pin Kit – ABS

€43,70 excl. VAT
NAD101490G - Starter Motor – V8
OEM

NAD101490G - Starter Motor – V8

€260,00 excl. VAT
302532 - Spiralok Nut
OEM

302532 - Spiralok Nut

€0,90 excl. VAT
561590 - Wheel Stud – Screw-In Type
Aftermarket

561590 - Wheel Stud – Screw-In Type

€2,90 excl. VAT
602099 - Inlet Manifold Seal – V8 – Straight
OEM

602099 - Inlet Manifold Seal – V8 – Straight

€3,10 excl. VAT
603851 - Carburettor Grommet – V8
OEM

603851 - Carburettor Grommet – V8

€10,10 excl. VAT