Upgrade Your Land Rover D200, D250 or D300 to D350

What Is the D350 Power Upgrade?

The D350 Power Upgrade is designed for compatible Jaguar Land Rover vehicles equipped with the 3.0L Ingenium inline-six diesel engine.

Depending on vehicle, model year, market and configuration, selected D200, D250 and D300 variants can be upgraded to approximately:

350 PS and 700 Nm

This corresponds to the performance level of the factory D350 specification.

Unlike conventional aftermarket tuning, the upgrade is performed through the vehicle’s existing JLR electronic systems.

No external tuning module is installed and no additional engine hardware is normally required.

Compatible Engines

The upgrade is available for selected vehicles equipped with the 3.0L Ingenium diesel engine.

Supported variants may include:

• D200

• D250

• D300

Compatibility depends on the individual vehicle configuration and must always be verified by VIN.

Compatible JLR Models

The D200, D250 and D300 engines are used across several Jaguar Land Rover model ranges.

Depending on model year and specification, the D350 Power Upgrade may be available for vehicles such as:

• Land Rover Defender

• Land Rover Discovery

• Range Rover

• Range Rover Sport

Not every vehicle uses the same software, powertrain configuration or security architecture.

For this reason, we always check the VIN before confirming compatibility.

Even Selected 2026+ Models Are Supported

One of the most common questions we receive from owners of newer JLR vehicles is whether the latest model years can still be upgraded.

The answer is:

Yes — selected 2026 and newer vehicles can also be supported.

Newer Jaguar Land Rover vehicles use updated software, diagnostic security and electronic architectures. Because of this, many older programming methods and tuning solutions no longer work on the latest vehicles.

Owners are therefore often told that their new Defender, Discovery or Range Rover is simply “too new” for a D350 upgrade.

That is not necessarily the case.

Our current solution also supports compatible vehicles using the latest-generation JLR systems, including selected MY2026+ vehicles.

If another workshop or tuning provider has already told you that your vehicle cannot be upgraded because of its model year, send us your VIN anyway.

The model year alone does not determine compatibility.

Why This Is Not a Conventional ECU Remap

A conventional ECU remap and our JLR D350 OEM Power Upgrade are two fundamentally different approaches.

With a traditional remap, the engine software is read from the ECU and individual calibration maps are manually modified by a tuner.

Typical changes may include:

• Boost pressure

• Injection quantity

• Torque limiters

• Throttle response

• Torque request

• Other engine calibration parameters

The modified calibration is then written back to the ECU as an aftermarket tuning file.

Our D350 OEM Power Upgrade Works Differently

We do not create a custom Stage 1 tuning file and we do not manually edit individual engine maps to create our own 350 PS calibration.

Instead, compatible vehicles are programmed using the original JLR electronic architecture and the factory-derived D350 performance strategy.

This means:

• No custom remap

• No manually created tuning calibration

• No aftermarket tuning box

• No piggyback ECU

• No additional control module

• No modified wiring

• No additional engine hardware normally required

The target performance is not freely chosen by a tuner.

The target is the original JLR D350 performance level.

The Difference in One Sentence

A conventional remap modifies the existing calibration. Our OEM Power Upgrade enables the higher factory JLR performance level.

Engineered by JLR — Enabled by Us

We are not developing our own 350 PS tuning calibration for your engine.

JLR already engineered the D350.

The factory D350 produces approximately 350 PS and 700 Nm.

Our job is to determine whether your D200, D250 or D300 is compatible and, where supported, enable the corresponding higher performance level through the JLR electronic architecture.

This is why we describe the service as an OEM Power Upgrade rather than a conventional Stage 1 remap.

No Tuning Box or Additional Hardware

The D350 Power Upgrade does not require an external tuning box or piggyback module.

For compatible vehicles, the process is software-based and integrated directly into the vehicle’s existing electronic systems.

There is normally no need for:

• Tuning boxes

• Additional ECUs

• Plug-in performance modules

• Modified wiring

• Engine hardware upgrades

The engine bay remains free from additional tuning hardware.

OEM-Level Integration

Modern JLR vehicles are highly networked.

The engine control unit, transmission, drivetrain and other vehicle systems continuously exchange torque and performance information.

This is one of the reasons why proper integration is important.

Rather than simply adding an external device that alters sensor signals, the D350 upgrade works within the existing JLR vehicle architecture.

The result is a clean, factory-style implementation designed to retain the original character of the vehicle.

What Does the Upgrade Change?

The biggest difference is the higher available engine output and torque.

Depending on the original version, drivers can expect:

• Stronger acceleration

• More torque

• Improved overtaking performance

• More effortless highway driving

• Improved performance under load

• Stronger towing performance

• Factory-style power delivery

The difference can be particularly noticeable in large and heavy vehicles such as the Defender, Discovery, Range Rover and Range Rover Sport.

Ideal for Towing and Heavy Vehicles

Additional torque is especially useful when the vehicle is regularly used for towing, long-distance driving or carrying heavy loads.

The D350 performance level provides more reserve when accelerating, overtaking or driving with a trailer.

At the same time, the aim is to retain the smooth and refined driving character expected from a modern JLR vehicle.

Remote D350 Activation

The D350 Power Upgrade can be carried out remotely.

You do not necessarily need to bring your vehicle to our workshop in Germany.

For remote activation, you typically need:

• A compatible Windows laptop

• A stable internet connection

• A suitable DoIP / ENET connection

• Access to the vehicle during the appointment

We connect remotely to your laptop and perform the required programming and configuration.

This allows us to provide the service to customers throughout Europe and worldwide.

How Does the Process Work?

The process starts with a VIN compatibility check.

1. Send Us Your VIN

Enter your 17-digit Vehicle Identification Number using our VIN check.

2. We Check Your Vehicle

We verify the model, engine version, software generation and vehicle configuration.

3. We Confirm Compatibility

If the D350 upgrade is available for your vehicle, we will explain the next steps and required equipment.

4. Remote Programming

At the agreed appointment, we connect remotely and perform the required programming and configuration.

5. Enjoy D350 Performance

After successful activation, the vehicle operates at the corresponding higher D350 performance level.

Why Do Some Providers Say New Vehicles Cannot Be Upgraded?

The JLR programming environment has changed significantly in recent model years.

Newer vehicles use more advanced diagnostic security and updated software architectures.

As a result, tools or methods that worked on older vehicles may no longer be able to access or program the latest models.

This is why some providers automatically classify newer vehicles, especially MY2026 and later, as unsupported.

Our approach is based on current JLR programming solutions.

Therefore:

Do not assume that your vehicle is unsupported simply because it is new.

The only reliable way to determine compatibility is to check the actual vehicle configuration.

Is Every D200, D250 or D300 Compatible?

No.

Although many vehicles share similar engines and hardware, JLR uses different software versions, control unit generations and vehicle configurations depending on:

• Model

• Model year

• Production date

• Market

• Engine version

• Software level

• Vehicle architecture

For this reason, compatibility is always checked individually.

Already Been Told Your Vehicle Is Too New?

Do not give up yet.

We regularly receive enquiries from customers who were previously told that their vehicle could not be upgraded because it was too new.

This is especially common with 2026+ JLR vehicles.

Send us your VIN and we will check the actual configuration of your vehicle.

Even if another provider has already said “not possible”, it may still be worth checking.