Service & Accessories

Because fluids now sit alongside or inside high voltage components. Coolant in a loop near the pack or the drive unit has an electrical conductivity requirement, and oil sharing a housing with an electric machine must be compatible with winding insulation, so a product that lubricates or cools perfectly well can still lower insulation resistance and set a fault that disables the vehicle. Add brake by wire units with fine clearances and the tolerance for approximate substitution has largely disappeared.

Anything the manual asks you to tighten by angle, plus most sealing washers, split pins, locking nuts with a nylon insert and self tapping trim screws. The angle tightened ones matter most, because that method deliberately stretches the fastener beyond its elastic limit to hold a very even clamp load, and a stretched bolt cannot do it twice. Copper and aluminium sealing washers work by deforming, so they seal once. Keep a small stock of the common sizes in the workshop, since running out mid job is what tempts people to reuse them.

Because the medium works by holding particles inside its depth, and cleaning attacks exactly that. Blowing air backwards through the paper opens the pores and pushes trapped dust further in, so the element looks better and performs worse. Washing does more harm again, since a wetted paper element loses its resin stiffening and the pleats collapse. The particles that get through afterwards are the fine ones that score bores and wear turbocharger bearings. Given how little an element costs against that outcome, fitting a new one at the stated interval is the only sensible policy.

Work from the procedure rather than the system capacity, because the two rarely agree. Flushing a brake circuit pushes clean fluid through until what comes out at each bleed nipple runs clear, and that takes noticeably more than the reservoir holds. A coolant change leaves old fluid in the heater core and the block unless the routine drains them, so the refill quantity is larger than the figure in the handbook. Add a margin for spillage. A part bottle left on the shelf is cheaper than stopping the job to wait for a delivery.

In many European countries it is a legal requirement rather than a suggestion, with details varying by country, and drivers crossing borders are expected to carry what each requires. Beyond the law, the recovery eye is the part you cannot improvise: suspension arms and bumper beams are not towing points, and on an electric vehicle the underbody is occupied by the traction pack. All of it costs very little and none of it can be sourced at the moment you discover it is missing.

Time matters more than distance, because brake fluid draws moisture from the air through the hoses and the reservoir vent whether the car is used or not. An electric vehicle that does most of its slowing through regeneration still ages its fluid at the same rate. A handheld moisture meter or a boiling point tester gives an objective reading, whereas dark fluid is a late sign rather than an early one. Water in the circuit corrodes the fine valves inside the stability control unit. If a test shows the fluid is past its best, check the grade on the reservoir cap and use the search box.

No. Low viscosity DOT 4 meets the same boiling point standard but flows far more freely when cold, and the pump and valves in a stability control unit are calibrated around that flow. Topping up a low viscosity system with standard DOT 4 thickens the mixture and can slow the unit's response on a winter morning. The two blend without any visible reaction, which is exactly why the mistake is so common. Silicone DOT 5 is a different chemistry altogether and must never enter a glycol system. Read the specification on the reservoir cap before ordering, then search for the matching fluid.

No, because colour is only a dye and manufacturers use it inconsistently. What matters is the inhibitor chemistry. Mixing an organic acid coolant with a silicate or phosphate based one can drop the additives out of solution as gel or sludge, and the narrow channels in a battery cold plate or a plate heat exchanger block far sooner than an old radiator would. Protection against corrosion falls at the same time. If the wrong product has already gone in, drain and flush rather than diluting the problem. Order by the OE number on the old coolant container.

Yes, far less often than an engine does, but the oil is not there for life. The oil in a single speed reduction gearbox collects fine metal as the gears bed in, and repeated heat cycles slowly wear out the additive package that protects the tooth faces and bearings. Many units have a magnetic drain plug, and the amount of paste on it is a useful health check. The drain and filler plugs seal with crush washers, so order new ones with the oil. Find the interval in the service schedule, then order by the OE number on the old parts.

Plastic clips harden with age, heat and sunlight, and turn most brittle in the cold, so breakages on an older vehicle are normal. A forked tool placed right beside the clip saves most of them. Refit a clip only if its legs are straight, its barbs intact and its grip still firm. Clips near curtain airbags are usually specified as new on every refit. Lookalike clips differ in head size and panel thickness, so order by OE number, or send a photo of the old clip through the quote form and we reply within 24 hours, usually sooner.

Thread diameter and pitch are only part of it. The seat where the bolt meets the wheel may be conical, spherical or flat, and a mismatched seat touches on a thin ring that lets the bolt loosen. Length matters as well, since a short bolt engages too little thread and a long one can foul the hub or brake parts behind it. Tighten in a star pattern with a calibrated torque wrench, keep threads dry unless the manual says otherwise, and recheck after a short drive once the seats have bedded. Compare against the old bolt and order by its OE number.

Follow the service schedule, but treat it as a maximum in dusty or humid conditions. A clogged element cuts airflow, slows demisting and gives a musty smell as moisture and trapped debris feed mould. The activated carbon layer in odour filters saturates long before the paper looks dirty. On an electric vehicle, heating and cooling draw on the traction battery, so a restricted filter makes the system work harder and costs range. Fit the new element with its airflow arrow pointing the right way, and order by the OE number printed on the old filter's frame.

On many vehicles it has a left hand thread, so it screws in anticlockwise. Wind it in by hand until the shoulder seats fully, then snug it with a bar through the eye, because a partly engaged eye can strip its thread or bend under load. Thread size varies between models, so an eye borrowed from another car may barely engage. On an electric vehicle, check the handbook for the tow or transport mode first, since dragging the driven wheels can damage the drive unit. If yours is missing, ask through the quote form and we reply within 24 hours, usually sooner.

Rarely well. Moulded liners follow the floor contours, seat rails and wheel arch shapes of one body, and a near match rides up at the edges and lets water or spilled liquids reach the carpet. The driver's mat matters most, because it locates on fixing hooks or clips in the floor, and one that slides forward can trap the pedals. Mats also differ between left and right hand drive vehicles. Remove the old mat before fitting a new one rather than stacking them. Check the OE number on the label underneath the old mat or liner, then use the search box.

Brake fluid does not keep well once the seal is broken, because it starts absorbing moisture straight away, even with the cap refitted. Plan the job so an opened bottle gets used up, and keep any spares sealed. Coolant and gear oil store far better if kept cool and tightly capped. Where coolant comes as a concentrate, dilute it with deionised or distilled water, since the minerals in tap water form scale and use up the inhibitors. Premixed coolant avoids the question entirely. Check the specification or OE number on the old container before ordering, then use the search box.