VW Touareg

The two electronically controlled VTG turbochargers become fouled by soot and oil ash. VTG control ring screws come loose, turbocharger seizes, limp mode. Repair is very involved, costs quickly five figures at a VW dealer.

Symptoms: Power loss, engine warning light, limp mode below 120 km/h, blue oil clouds, oil loss in engine bay

The tandem pumps sit above the turbochargers at one of the hottest spots. Flange gaskets and the pump become brittle and leak — fuel enters the oil. Experienced workshops can carry out the repair without removing the engine.

Symptoms: Diesel smell in engine bay, oil level rising and smelling of diesel, fuel consumption mysteriously low

The ten PD units coke up heavily and lose their sealing rings. Cylinders with differing injection quantities cause combustion misfires and white smoke. Elring repair kits enable overhaul.

Symptoms: White or blue smoke at idle, combustion misfires readable via VCDS, rough idle

The rear crankshaft seal ages and loses oil. Engine and gearbox must be removed for the repair — a very involved job that is still economically viable at an independent workshop.

Symptoms: Oil patch under the vehicle centrally at the rear, oil mist on gearbox housing, steadily falling oil level

The AISIN automatic gearbox is rated for 750 Nm and is fundamentally robust. Without gearbox oil changes every 120,000 km, clutch packs and torque converter wear — repair costs 3,000–8,500 €.

Symptoms: Shift problems, judder on pull-away, gearbox oil discoloured black, delayed gear engagement

Air bellows and compressor fail after 60,000–100,000 km. Aluminium union nipples corrode (replacement: brass). The compressor relay (only rated at 40A) seizes after 3–4 years. Repair costs €1,500–3,000.

The multi-plate clutch in the transfer case (VTG) shows wear from approximately 40,000–60,000 km. Individual plates come loose and damage others. Particularly noticeable at temperatures below 5°C and in tight corners.

The Touareg 7L-FL air bellows become porous and leak from approximately 100,000 km. The vehicle sags overnight and the compressor runs constantly. Individual bellow approximately €300–600, complete set €1,500–2,500.

The Tiptronic automatic gearbox frequently shows harsh gear changes when shifting from 4th to 3rd or 5th to 4th. Cause is often the shift valve body or a defective gearbox output speed sensor.

Crossmember bolt holes, drain plugs on differentials, and suspension components rust after just 2–3 years. VW classifies this as 'normal'. At high mileages, corrosion on hinges and door folds.

Due to the high vehicle weight, brake discs and pads wear significantly faster than on normal cars. Rear brake discs rust quickly with low brake use. Replacement needed every 40,000–60,000 km.

The complex electronics of the Touareg 7L frequently cause parasitic current draw that drains the battery overnight. Causes include various control units that don't shut off, plus defective switches.

Sunroof drain tubes block with leaves and dirt. Water runs into the cabin at reading lights or into the footwell. Repair of the distorted frame can cost up to €1,600.

Xenon headlights fail early, often due to defective control units. Replacement of a ballast costs €200–500 per side. Mainly affects vehicles from model year 2004 onwards.

On the 3.0 V6 TDI, the water pump sealing face to the crankcase loses its preload. Repair requires front-end disassembly. Wrong pump version frequently ordered.

The propshaft centre bearing wears from approximately 85,000 km and causes vibrations. VW dealers replace the complete shaft (€800+); specialists repair from €190.

The actuator motor on the transfer case (differential) fails due to moisture and dust at the connectors. Error message 'Differential system error workshop' on the display. Cleaning the connectors can help.

The driveshaft seal on the automatic gearbox (Aisin 09D) leaks and causes gearbox oil loss. Repair requires lowering the gearbox — involved and expensive (€500–1,500).

The underbody and especially the subframe of the Touareg 7L-FL corrode with off-road or winter use. Particularly affected: exhaust mounts, brake lines, and axle mountings.