Service Overview

Our Maximum Vehicle Speed Limit Correction service adjusts the factory programmed Vmax top speed limiter on compatible Jaguar and Land Rover vehicles. Many JLR models carry a factory-set maximum speed restriction defined by regional market specifications, which can sit below the vehicle’s true mechanical capability. This validated programming service modifies the powertrain ECM and CCF parameters to correct the maximum vehicle speed limit. The service allows adjustment of the top speed value within the safe mechanical boundaries of engine, transmission, tyres and braking hardware. This is a software-only modification that requires no engine hardware upgrades. This service suits vehicle importers, specialist workshops and owners who require corrected speed limiting for their market specification. It works across compatible Range Rover, Range Rover Sport, Defender, Discovery, F-PACE, XE, XF and F-TYPE models with supported Ingenium and legacy powertrain ECUs. Drivers must always follow local traffic laws and speed limits on public roads.

JLR Technical Workflow

Our certified JLR technicians start with a full pre-programming diagnostic scan across the powertrain network. We read the vehicle VIN, current CCF file, ECM calibration data, stored DTCs and factory speed limit value before any parameter changes. We validate engine, transmission, tyre specification and powertrain module communication to confirm the vehicle supports the requested speed limit adjustment. The programming routine writes revised Vmax parameters to the ECM and updates matching CCF configuration data. After programming completes, we perform an ignition cycle and allow the powertrain modules to fully initialise. We carry out road validation to confirm the new maximum speed limit activates correctly and the powertrain delivers smooth operation up to the revised threshold. A post-programming CAN network scan confirms no new diagnostic trouble codes register across connected modules. Standard cruise control, ASL automatic speed limiter, traction control and DSC stability systems retain their core factory safety functions.

Key Service Benefits

• Corrects factory maximum Vmax speed limit via validated ECM and CCF powertrain programming
• Software-only adjustment; no mechanical component changes, turbo or exhaust hardware required
• Full pre-programming powertrain diagnostic inspection and post-service functional validation
• Adjusts speed limit within the safe mechanical operating envelope of your vehicle
• Preserves DSC, traction control, ASL speed limiter and all factory safety protection logic
• Delivers documented service report with before and after speed limit and ECM configuration data for workshop records

Pre-Service Requirements

You provide the complete vehicle VIN, model, production year and requested maximum speed setting during order submission. The vehicle must have fully operational engine, transmission, braking system and tyres rated for the target speed. Maintain stable 12V battery voltage during programming to prevent ECM or CCF corruption. This service adjusts software speed limit parameters only; it cannot repair engine faults, worn brakes or degraded tyre condition. Our technical team reviews your vehicle specification and confirms service eligibility before starting the programming operation. Always respect all local public road speed legislation.

Ordering & Delivery Process

Select this product and submit your VIN and vehicle details at checkout. Our JLR technical team validates powertrain ECU compatibility and confirms service feasibility. Once approved, we perform ECM and CCF programming to apply the corrected maximum vehicle speed limit. After work finishes, we send a service validation report and guidance for road testing the revised limiter. Contact our technical support team to confirm your powertrain supports this service before purchase.

Frequently Asked Questions

Does this service remove all speed limits completely?

No. We set a new defined maximum speed limit within the vehicle’s mechanical safe operating range. The vehicle retains its factory safety and stability control systems.

Will this coding affect my existing automatic speed limiter (ASL) or cruise control?

ASL and cruise control remain functional. The change only affects the hard top speed limit stored inside the powertrain ECM.