Servicing an EV: what stays and what goes

Servicing a combustion car revolves largely around the engine: oil, filters, ignition, belts, exhaust. An electric drivetrain has almost none of that. The motor runs without combustion and with very few moving parts, and the gearbox usually has a single ratio. What wears there are bearings and seals, and those generally last a long time.

The rest of the car is the same as on any other vehicle. Brakes, suspension, steering, tyres, air conditioning, wipers, lights and body age and wear, some of them faster because of the extra weight. Then there are components a combustion car does not have: the traction battery with its cooling, the power electronics, the charging port and the high-voltage cables.

So servicing an electric car is shorter and usually cheaper, but not pointless. How often it is due and what it covers is set by the manufacturer's maintenance schedule. Intervals differ between brands and models, sometimes even between model years of the same car. What counts is the schedule for your car, not a general rule.

The real advantage in running costs lies less in the price of a single service than in the repairs that simply cannot arise: no oil leaks from the engine, no clogged particulate filter after lots of short trips, no snapped timing belt. With the engine, its typical knock-on damage goes too.

Gone with the combustion engine are the items that make up most of a combustion car's service bill:

Brake fluid stays, and it matters as much on an electric car as on any other. It absorbs water over time, regardless of how often you brake. As the water content rises its boiling point falls, and on a long mountain descent or in an emergency stop it can form vapour bubbles. That is why it is changed by time, not by mileage.

The cabin filter stays too, and the air conditioning gains importance. On many models the battery cooling hangs off the same refrigerant circuit, and on cars with a heat pump the heating does as well. An air-conditioning service is no longer a comfort question there. Some heat pumps also use a refrigerant that not every workshop has the equipment for; ask when you book.

Further items, depending on the schedule:

New on the schedule is the high-voltage check. It includes a visual inspection of the orange cables and connectors, of the charging port and of the battery housing from below, because grounding on kerbs or farm tracks leaves marks there. Through diagnostics the workshop reads whether the insulation between the high-voltage system and the body is intact, and checks the fault memories of battery and power electronics.

Many workshops also read out the battery's state of health. Whether that is part of the service or a separate job varies; ask, and get the result in writing. A documented figure from every service builds a curve over the years, and that curve is worth more when you sell than a single measurement.

The second new item is software. Manufacturers use updates to improve charging strategy, thermal management and battery protection. Some arrive over the mobile connection, others only at the workshop. At the service, ask whether the software is up to date and whether any recalls or technical campaigns are open; on an electric car such campaigns are often carried out in software.

In everyday driving, regeneration does most of the slowing down. Pads and discs therefore last much longer than on a combustion car, and that is exactly the problem. A disc that is rarely used hard gathers rust that no pad scrubs off. Guide pins and pistons in the caliper that hardly move become stiff. The result is scoring, unevenly worn pads and, at worst, a brake that seizes or drags.

Some manufacturers therefore let the friction brakes join in from time to time under software control; others fit rear drum brakes, which are better protected. That does not replace the inspection. Servicing an electric car explicitly includes cleaning the brakes, freeing the guides and assessing the discs, not just measuring pad thickness.

There is little you can do yourself, but it helps: now and then, on an open road with nobody behind you, press the pedal firmly so the friction brakes really bite. Do that regularly and you often avoid discs that have to be replaced because of rust while the pads are still thick.

Manufacturer and battery warranties come with conditions, and the most common is servicing to schedule. On an electric car that seems excessive, but it has a real core: the high-voltage check, the cooling circuit and the software version are exactly the points a manufacturer argues with in a warranty case. If a service is missing, it can blame battery damage on a lack of maintenance, and you have to prove otherwise.

Where the service is done is a separate question. In many European countries competition law protects your free choice of workshop for maintenance, as long as the work follows the manufacturer's specifications, uses equivalent parts and is documented. Some manufacturers tie voluntary extras, such as an extended battery warranty, to regular checks within their own network. What applies to your car is in the warranty terms; if in doubt, ask the manufacturer in writing.

When you sell, the same document counts. A complete service history with high-voltage checks and battery figures is one of the strongest arguments for the price of an electric car; a gap is an open question. On Carvexia a seller can state in the listing when the last service with a receipt took place. That appears as the seller's statement, not checked; as a buyer you ask to see the receipts yourself.

Only people trained for it may work on the high-voltage system. The voltages in the battery and power electronics can kill, and a mistake when isolating the system cannot be undone. Each country sets the levels of this qualification and their names through occupational safety rules and trade regulations. A workshop that offers such work can tell you what training its staff have.

Routine servicing does not need that top level. Any competent workshop can handle tyres, brakes, filters, wipers and suspension, as long as its staff know where the high-voltage components are and what they must not touch. What matters is that the workshop has the manufacturer data for your model and can read the diagnostics; without them the high-voltage check remains a visual one.

An independent workshop is therefore not the worse choice, but one where you ask first. In the garage directory on Carvexia you can filter by the keyword for electric servicing. The garage sets that keyword itself; it is not a checked qualification. In the booking request, ask specifically whether the workshop does high-voltage work on your model, whether it reads out the battery's state of health and which items of the maintenance schedule it covers.