Land Rover Defender P400 L663 Remapping and Tuning
Upgrade your Land Rover Defender P400 400HP with professional Stage 1 and Stage 2 ECU tuning from Onyx Performance in Slough, Berkshire. Our remapping solutions are designed for the 3.0-litre I6 turbocharged petrol MHEV engine, delivering increased power, torque, throttle response and overall drivability while retaining the versatility and refinement expected from the Defender.
The Defender P400 combines a turbocharged six-cylinder petrol engine with mild-hybrid technology. A professional ECU remap can unlock additional performance, sharpen throttle response and provide stronger acceleration, making the vehicle more responsive on the road while retaining its everyday practicality.
Land Rover Defender P400 Performance Figures
| Performance | Power (HP) | Torque (Nm) |
|---|---|---|
| Standard Performance | 400 | 550 |
| Stage 1 Remap | 450 | 650 |
| Stage 2 Remap | 480 | 690 |
Stage 1 Remap Price: £599.00
Original Price: £718.80
Stage 2 Remap: Call for a Stage 2 quote
All performance figures are indicative and can vary depending on vehicle condition, fuel quality, hardware and other factors.
Gearbox Tuning
A gearbox remap can complement your engine calibration by refining gear changes, shift response and torque management. We can discuss the available gearbox tuning options for your Defender P400.
- Stage 1 Gearbox Remap: Contact for Price
- Stage 2 Gearbox Remap: Contact for Price
- Stage 3 Gearbox Remap: Contact for Price
BEFORE TUNING
Before carrying out any remapping, we recommend ensuring your Defender is in good mechanical condition. We check for relevant fault codes and assess the vehicle before tuning. Any existing mechanical issues should be addressed first to help ensure a reliable result.
SERVICING AND MAINTENANCE
Regular servicing is important for maintaining performance and reliability. We recommend keeping up to date with engine oil, filters and other manufacturer-recommended maintenance, particularly when increasing engine output.
EXHAUST UPGRADES
An exhaust upgrade can complement your vehicle’s performance setup. Onyx Performance can discuss suitable exhaust options for your Defender, taking into account your requirements and applicable road-use regulations.
PERFORMANCE UPGRADES
Alongside ECU remapping, we can advise on suitable performance upgrades to complement your vehicle. The right combination of modifications can help improve power delivery, response and the overall driving experience.
STYLING AND BODY UPGRADES
Enhance the appearance of your Defender with styling and body upgrades. Contact our team to discuss available options and find enhancements that suit your vehicle.
VEHICLE SECURITY
Protect your vehicle with security solutions from Onyx Performance. Speak to our team about available vehicle security enhancements and options suitable for your Defender.
WHY CHOOSE ONYX PERFORMANCE?
Onyx Performance provides professional vehicle tuning and performance upgrades from Slough, Berkshire. We focus on vehicle-specific calibration and clear advice, helping you choose an upgrade that suits your vehicle and driving requirements.
REMAPPING IN SLOUGH
Based in Slough, Berkshire, Onyx Performance offers professional ECU remapping and vehicle upgrades. Contact our team to discuss your Land Rover Defender P400 L663 and arrange your tuning appointment.
Frequently Asked Questions
How much power can a Stage 1 remap add to my Land Rover Defender P400?
The standard Defender P400 produces 400HP and 550Nm. Our indicative Stage 1 figures are 450HP and 650Nm, offering a noticeable increase in power and torque.
How much power can a Stage 2 remap produce?
Our indicative Stage 2 figures are 480HP and 690Nm. Stage 2 tuning may require supporting hardware modifications, so contact us to discuss your vehicle’s specification and request a quote.
Do I need hardware upgrades for Stage 1 or Stage 2?
Stage 1 is generally designed for a vehicle with standard hardware in good condition. Stage 2 may require supporting modifications, depending on the calibration and vehicle setup. We can advise on the requirements for your Defender.
Can I have a gearbox remap with my engine remap?
Yes, gearbox tuning may be available alongside your engine remap. Contact us to discuss compatibility and the options available for your vehicle.
Can I have a dyno session?
Yes. Dyno sessions are available for £120.00. A dyno session can help assess your vehicle’s performance before or after tuning.
Do you offer Stage 3 tuning?
We can discuss more extensive tuning options and supporting modifications. Stage 3 suitability depends on the vehicle’s hardware, intended use and overall specification. Contact us to discuss your requirements.
Does my Land Rover need an ECU unlock?
Your Defender P400 uses a Bosch MG1CS028 ECU. ECU access and whether an unlock is required depend on the ECU hardware and software version fitted to the vehicle. We can check the relevant details before confirming the available tuning method.
BOOK YOUR REMAP
Contact Onyx Performance to discuss your Land Rover Defender P400 L663 remap. Our team can help you choose the right tuning option and arrange your appointment.
Contact Onyx Performance
Transform your Land Rover Defender P400 L663 today with Onyx Performance. Whether you’re looking for Stage 1 or Stage 2 remapping, performance exhaust systems, styling enhancements, or vehicle security solutions, our expert team is here to help.
