A regulatory context in flux

The question of the tuning box for a company fleet cannot be addressed without talking about taxation and energy policy. And the picture is evolving rapidly across many countries.

In most European markets, fiscal incentives now clearly steer fleets towards electric vehicles. The benefits granted to combustion vehicles are being progressively reduced, while CO₂ emissions are subject to increasingly heavy levies. For companies, the overall direction is therefore unambiguous: electric vehicles are becoming the norm for any new company car in a growing number of countries.

So for whom does the tuning box remain relevant?

The honest answer is: for fleets that still have combustion or hybrid vehicles on current contracts. And there are many of them. Not all companies have switched overnight. Leasing contracts run for three, four, sometimes five years. Combustion vehicles ordered before the major fiscal reforms are still in circulation and will continue to be for years. This existing fleet needs to be managed, optimised and maintained - and no fiscal constraint changes the fact that a combustion engine working in its optimal conditions costs less to run.

This is precisely where the quality tuning box comes in. By optimising torque availability at low revs, it enables smoother driving, reduced engine stress, and potentially lower fuel consumption on mixed routes. Across a fleet of vehicles approaching end of contract, every tenth of a litre per 100 km matters.

There is also a special case: light commercial thermal vehicles (vans, pick-ups, delivery trucks). In most countries, these are not affected by the fiscal reforms targeting company cars and retain their usual deductibility regime. For this segment, the relevance of the tuning box remains entirely intact.

Finally, self-employed workers and liberal professions often benefit from differentiated fiscal treatment compared to companies. For them, optimising a vehicle currently in use retains its full relevance, regardless of how the rules applicable to company fleets evolve.

What about the future? Limited visibility calls for caution

One might think the debate is settled: electric for company vehicles, full stop. The reality is more uncertain.

The European Union, after setting a course towards banning combustion engines by 2035, has since moderated its position. Several manufacturers have reintroduced combustion and light hybrid engines into their ranges, or deferred strategic decisions. In many countries, voices regularly point to the practical limitations of a forced transition to electric: insufficient charging infrastructure, acquisition costs, range in winter conditions, energy management on company sites.

I do not claim to know what fiscal frameworks will look like in two or three years. And that is precisely the problem: nobody really does. In this context of uncertainty, savvy fleet managers avoid long-term bets and favour short-term, reversible optimisations on what they already have.

A quality tuning box responds exactly to this logic.

The Car Policy question: framing without overcomplicating

For the vehicles concerned, the question of compatibility with the Car Policy remains legitimate. The answer is straightforward: a quality tuning box, specifically developed for each engine type, with original manufacturer connectors and integrated electronic protections, is fully removable. It leaves no trace in the engine management unit once removed. At the end of a leasing contract, the vehicle returns to its strictly original configuration.

Some tuning boxes, such as those from P-Tronic, are TÜV-approved, which provides a solid basis for any discussion with an insurer or leasing company. In a Car Policy, this equipment can be framed simply: specification of the approved product, notification to the insurer, removal at the end of the contract.

What I take away

The tuning box is not a response to the energy transition of fleets. That would be making it say something it does not say. It is a concrete, reversible and well-documented optimisation for combustion and hybrid vehicles still in circulation. In a fleet that will gradually be renewed towards electric, these vehicles deserve to be managed intelligently to the end.

For the right vehicle, with the right product and realistic expectations, that is exactly what a rigorous fleet manager is entitled to expect.