Terms & Conditions

1.1 Payment for all services will be agreed up front between JH Auto Developments and the customer. Payment must be received from the customer following completion of the work and on (or before) hand over of the vehicle. If a deposit or payment in advance is required for more complex services or parts, a price will be agreed, and payment taken before any work commences.

1.2 Customers must inform JH Auto Developments if their ECU (Engine Control Unit) has already been remapped, altered, removed, or replaced elsewhere. This information must be supplied before work commences, and ideally before a booking is confirmed. JH Auto Developments will not be liable for any issues with a vehicle or ECU where this information has not been supplied in advance. Any applicable warranties will also be invalidated.

1.3 Customers must inform JH Auto Developments if a tuning box has been fitted to their vehicle. This information must be supplied before work commences and ideally before a booking is confirmed. JH Auto Developments reserves the right to refuse to continue further work if an add-on tuning box is found and the customer will be charged for any work already completed. JH Auto Developments will not be liable for any issues with a vehicle or ECU where this information has not been supplied in advance. Any applicable warranties will also be invalidated.

1.4 Customers must inform JH Auto Developments if an after-market alarm or CAN blocker has been fitted to their vehicle. This information must be supplied before work commences and ideally before a booking is confirmed. JH Auto Developments reserves the right to refuse to continue further work if an after-market alarm or CAN blocker is found once work has commenced. In such cases the customer will be charged for any work already completed. After-market alarms and blockers can interfere with communications and cause problems with the vehicle. JH Auto Developments will not be liable for any issues with a vehicle or ECU caused by an after-market fitted items. Any applicable warranties will also be invalidated if JH Auto Developments has not been informed in advance if any have been fitted to the vehicle.

1.5 Customers must inform JH Auto Developments of any known mechanical issues with their vehicle and any repairs or modifications completed. This information must be supplied before work commences and ideally before a booking is confirmed. JH Auto Developments will not be liable for any issues with a vehicle or ECU where there is an existing mechanical problem with the vehicle, or where information about vehicle repairs and modifications has not been supplied in advance.

1.6 The customer is responsible for arranging and meeting the cost of vehicle recovery (if necessary) where information about after-market alarms / fittings, add-on tuning boxes, existing mechanical or ECU faults, modifications, or previous tuning by third parties has not been supplied to JH Auto Developments by the customer before work commences.

1.7 Following the initial provision of services, JH Auto Developments may undertake further work at the request of a customer if faults are suspected or discovered. Work to investigate, identify, or resolve, suspected or actual vehicle faults, will be chargeable at the standard rate, unless the issues concerned are directly caused by work previously completed by JH Auto Developments. A vehicle must be mechanically sound and in a good working condition before remapping it. Once a new map is put on a vehicle, more may be asked of the vehicle when driving it. Any existing mechanical (or other) issues may be exacerbated. JH Auto Developments is not responsible for any existing or underlying faults with a vehicle; therefore, additional work to assist a customer will be chargeable.

1.8 Refunds will not be issued for remaps or other tuning work where vehicle performance or running capability is compromised by existing or underlying mechanical or ECU faults, or the presence of after-market alarms / other after-market fittings.

1.9 Refunds will not be issued for remaps or other tuning work where a vehicle has not achieved the performance improvement outcomes quoted because the pre-remap performance outputs are below the manufacturer (or stock) standard. This also applies when no stock output is proved before tuning; not all vehicles will gain exact figures nor run identical power stock.

1.10 Refunds will not be issued for remaps or other tuning work where a vehicle has not achieved the performance improvement outcomes quoted due to existing or underlying mechanical or ECU faults.

1.11 After remapping a vehicle it is important that good quality fuels are used. Refunds will not be issued for remaps or other tuning work where a vehicle has not achieved the performance improvement outcomes quoted because of the use of poorer quality fuels. JH Auto Developments reserves the right to take a sample from the fuel tank of a customer’s vehicle in the process of investigating any suspected performance issues reported by the customer.

1.12 An estimate of how long the work requested will take can be provided when booking JH Auto Developments services. However, there may be occasions where more time is needed to complete the work fully and in line with JH Auto Developments high standards. JH Auto Developments will keep the customer informed of any significant delays.

1.13 In the rare event of unanticipated complications, customers may not be able to drive their car away on the same day. Refunds will not be given on this basis. Complications are usually a result of a faulty ECU or existing mechanical problems with the vehicle.

1.14 In the event that a customer chooses to drive away or otherwise remove their vehicle from JH Auto Developments before the work is completed, JH Auto Developments will not be liable for any resulting issues with the ECU, the vehicle itself or any individual components. Any applicable warranties will also be invalidated.

1.15 JH Auto Developments will endeavour to repair (or if necessary, replace) an ECU in the rare event that an ECU is damaged as a result of work undertaken by JH Auto Developments. If an ECU is damaged as a result not of JH Auto Developments, such as electrical fault, water ingress or flashing software errors, then it will not be covered. Payment for the original work requested and completed will still be due from the customer at the agreed price.

1.16 Should a customer discover a suspected fault with the work completed by JH Auto Developments, the customer should contact JH Auto Developments at their earliest convenience and within one week of vehicle collection. JH Auto Developments will discuss the issue with the customer and arrange an appointment to investigate the fault, if necessary. This would be chargeable if found to be unrelated to the tuning work undertaken.

1.17 JH Auto Developments is not responsible for correcting suspected faults where the customer or a third party has worked on or interfered with the vehicle or the vehicle’s ECU since collecting the vehicle from JH Auto Developments. Any applicable warranties will also be invalidated.

1.18 Software faults and issues with the map / directly caused by the map are very rare. Where they do occur and are genuinely caused by a remap, a customer will notice immediately when driving the vehicle. In these instances, the customer should contact JH Auto Developments and return to JH Auto Developments within 7 days of the date the remap or service was completed. Refunds will not be issued after 7 days of the original remap or service.

1.19 DPF (Diesel Particulate Filter) removal and delete services are completed at the independent request of the customer. The customer is fully responsible for their decision to have the DPF removed and deleted on their vehicle(s). It is carried out with the expectation that the vehicle is used in accordance with UK legislation. It is the customer responsibility to ensure this.

1.20 DPF removal and delete services are completed using a method that does not meet the current MOT inspection requirements. MOT requirements and legislation relating to emissions systems may change in the future. Applicable warranties do not extend to any future changes in MOT inspection requirements, regulations, or testing methodologies. Applicable warranties do not extend to future changes in any other relevant legislation.

1.21 Quotes provided may be based on the ability to read and write to an ECU through an ODB (On-Board Diagnostic) port. Reading and writing through the port may not be possible if there is an unanticipated problem with the port itself. In these cases, the ECU will have to be removed from the vehicle and the work performed on a bench. This will incur an increased cost and take longer to complete. A JH Auto Developments representative will inform the customer of the situation and the revised price before going ahead with any further work.

1.22 Some vehicles have security bolts on the ECU casing / housing. The heads of such bolts will need to be cut to enable the removal of an ECU. The original bolts will be replaced once the work has been completed and the cuts to the head of the bolts will remain. This is standard practice for tuning services where an ECU is removed for the completion of the services requested.

1.23 Where a customer chooses to use vehicle parts that they have sourced independently for modifications or repairs:

• JH Auto Developments will not be liable for any faults with the parts
• The customer is responsible for ensuring that the parts and materials supplied for use are good quality and that all necessary components are present
• The customer will be charged for any additional labour time resulting from the supply of incorrect, ill fitting, poor quality or missing parts
• The customer will be charged for any additional labour time resulting from the need to return parts to stock following issues with the parts supplied.
• JH Auto Developments may refuse to commence or continue with planned work if the parts supplied are incomplete, missing key components or found to be such poor quality that they do not fit or work correctly. In such cases a JH Auto Developments representative will discuss the options available with the customer. The customer will still be charged for the cost of labour where work has already commenced.
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1.24 An ECU can be returned to stock following a remap by JH Auto Developments at the request of the customer. There will be a minimum charge of £80 for this service and it will be treated as a normal booking. The full price of the original remap may be charged where there is significant work involved.

1.25 JH Auto Developments is not responsible for reinstalling a map where a customer’s ECU has been reset by a vehicle dealership or any other third party. The map can be reinstalled at the request of a customer; however, there will be a minimum charge of £80. The full price of the original remap may be charged where there is a significant work involved.

1.26 Persons leaving a vehicle with JH Auto Developments do so at their own risk. JH Auto Developments is not liable for any damage, vandalism or theft relating to vehicles while under our care. This also applies to any surrounding roads.

1.27 JH Auto Developments takes reasonable steps to ensure that the customers vehicles are secure. In the unfortunate event that a vehicle is stolen or damaged, including in a fire, the customer will be responsible for making a claim through their own vehicle insurance.

1.28 Customers and members of the public are not permitted to enter when work is being undertaken. Any unauthorised persons found in restricted areas will be asked to leave due to issues that may be caused. The relevant authorities will be notified in cases where damage to or theft of equipment occurs, and further action may be taken to retrieve any losses concerned.

1.29 JH Auto Developments will not be liable for any incidents or injuries where unauthorised persons have entered restricted areas, or where persons have failed to comply with safety warnings or instructions in any area of the premises, or as set out in the JH Auto Developments documents supplied.

1.30 Visitors and customers are asked to treat all JH Auto Developments representatives and other visitors and customers with respect. Visitors and customers may be asked to leave in the event of inappropriate behaviour.

Points for Consideration

2.1 We advise against booking your vehicle in for any of our services immediately before a trip or holiday where you plan to use your vehicle. In the rare event of unexpected complications, you may not be able to drive your car away the same day.

2.2 In many cases we can read and write to an ECU through an ODB (On-Board Diagnostic) port. This process usually takes approximately 1 hour and 30 minutes to 2 hours. However, if there is a problem with the port, and the ECU must be removed for work to be performed on the bench, the process will take longer and cost more due to the labour time involved. If this situation occurs a JH Auto Developments representative will contact, you to discuss the situation before proceeding. Please note that some vehicles cannot be mapped via an ODB Port at all; in this case the quoted price will reflect.

2.3 We try our best to deliver our services within the estimated timeframe. However, every vehicle has a different history and sometimes unanticipated challenges arise. In these cases, the work may take longer than first thought. Please consider this when making your booking and any other arrangements regarding transport and the use of your vehicle.

2.4 The maps used by JH Auto Developments have been thoroughly tested and produce or near to the range of power or economy gains quoted. However, this cannot be guaranteed as all vehicles are different. Therefore, please understand and be aware that these may not be fully achieved if:

• There is an existing mechanical or electrical issue with the vehicle
• The vehicle’s pre-remap performance outputs are below the manufacturer (or stock) standard
• You have not used a good quality fuel in your vehicle
• The vehicle has poor service history and lack of maintenance to manufacturer standards. 

Please talk to a JH Auto Developments representative if you have any questions about these points.

2.5 Please remember that it is very important that your vehicle is mechanically sound and in a good working condition before remapping it. Once a new map is put on your vehicle you are likely to be asking more of your vehicle when driving it. Any existing mechanical issues may be exacerbated. JH Auto Developments is not responsible for fixing existing or underlying mechanical issues. You will also be charged for any additional services you request from us

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2.6 It is important that you tell us about the following before we start work, and preferably before confirming your booking:

• Any existing mechanical faults
• Any existing ECU faults
• If you have an after-market vehicle alarm fitted (these can interfere with the ECU) or any other after-market fittings (CAN blockers etc)
• If you have an add-on tuning box fitted
• If your vehicle has any modifications
• If your vehicle has previously been remapped or tuned elsewhere

Please be aware of our full Terms and Conditions relating to these points.

2.7 We advise against sourcing your own parts independently for any modifications you may be requesting, for example as part of a Stage 2 remap. This is because problems can arise if customers accidentally source incorrect or poor-quality parts. However, if you choose to use your own parts then please be aware of our terms and conditions.

2.8 If you find a suspected fault following the completion of work by JH Auto Developments, please tell us as soon as possible and within a week of collecting your vehicle. Do not let a third-party work on or interfere with the ECU or the vehicle itself before coming back to us. If you or a third party has interfered with the ECU / vehicle then further damage may have been caused, which could result in more serious issues. JH Auto Developments will no longer be responsible for resolving a suspected fault in such a situation.

2.9 A Disclaimer must be accepted for all tuning, whether tuned on a dyno or not. Tuning is a safe process and may put the vehicle under more stress when driven harshly. If the disclaimer is not signed this will be taken as you understand and agree to the Terms & Conditions stated here and within the Disclaimer document.

Click the button to read and accept the disclaimer.