Sign up now
Join now and unlock your hidden features and OEM upgrading experiences.
You must be logged in to submit the form.
D300 to D350
$594.00
0-60 = from 6.5s to 5.8sPower = from
300ps to 350psTorque = from 650nm to 700nmTop Speed = from 135mph to
145mphPlease note – this is not a “re-map”. This is a genuine power
upgrade. We use the same process that is used on the production line to
ensure that the correct calibrations are uploaded to the
vehicle.Manufacturers specifications are maintained.
D300 to D350 | JLR 3.0L Ingenium MHEV Diesel OEM Performance Unlock
It applies to 3.0L inline-six Ingenium MHEV diesel engines fitted in Defender, Range Rover and Range Rover Sport models.
JLR uses identical mechanical hardware for D300 and D350 variants.
Factory PCM and CCF software limits cap D300 power output from stock.
Our dealer-grade programming enables the dormant OEM D350 calibration profile.
This service requires no hardware changes or aftermarket ECU flashes.
It supports technical research and direct transactional purchases for JLR owners.
Core JLR Technical Specifications
- Stock D300 output: 300 PS / 650 Nm peak torque
- Unlocked D350 output: 350 PS / 700 Nm peak torque
- Total performance gain: +50 PS power and +50 Nm torque
- Compatible engines: 3.0L Ingenium inline-six MHEV diesel (MY21–MY25)
- Affected modules: PCM, CCF, IPC instrument cluster and gateway ECU
- Full retention of factory thermal limits and diesel emission systems
- Preserves SOTA updates, DTC functionality and dealer diagnostics
- 100% reversible configuration with pre-programming CCF backup
JLR Diesel Powertrain Engineering Logic</h2>>
JLR manufactures D300 and D350 engines with matching turbo and fuel system hardware.
All cooling, injector and mild-hybrid components share identical factory specifications.
Software restrictions limit boost pressure and fuel delivery on base D300 models.
These calibrated limits protect marketing tier separation, not mechanical durability.
Our coding activates the factory D350 PCM map stored within stock firmware.
It adjusts turbo spool rates and fuel timing to match flagship output levels.
All OEM safety protocols and emission compliance rules remain fully active.
Real-World Driving & Towing Benefits</h2>>
The D350 calibration delivers improved low-end torque for stronger pulling power.
Mid-range acceleration feels more responsive for overtaking and highway cruising.
Increased torque output greatly improves heavy-load towing capability.
MHEV e-boost system syncs perfectly with new power and torque parameters.
Fuel economy remains consistent with stock D300 factory efficiency figures.
No aftermarket tuning compromises long-term engine or DPF reliability.
The instrument cluster updates to display accurate D350 performance metrics.
OEM PCM & CCF Programming Procedure</h2>>
Our technicians perform a full pre-scan to log faults and back up your original CCF.
We establish a secure DoIP gateway session using official JLR Pathfinder software.
The process enables D350 powertrain flags and flashes OEM PCM calibration tables.
It synchronises updated parameters across all connected vehicle ECUs.
We clear latent DTCs and validate full network communication stability.
A final road test verifies smooth power delivery and fault-free operation.
Every upgrade retains full dealer serviceability and original factory compliance.
Our pure OEM calibration unlocks latent diesel power safely and reliably.
Enjoy improved acceleration, towing strength and refined engine response.
All programming is reversible, diagnostic-safe and emission-compliant.
Place your order today for professional JLR-grade diesel calibration.
Be the first to review “D300 to D350”
You must be logged in to post a review.
Related products
OEM Upgrade
$180.00
OEM Upgrade
$180.00
OEM Upgrade
$900.00
OEM Upgrade
$840.00
OEM Upgrade
$180.00
OEM Upgrade
$600.00
OEM Upgrade
$1,800.00
OEM Upgrade
$600.00
Reviews
There are no reviews yet.