VW Touran
1.4L TSI Twincharger (EA111) with mechanical supercharger + turbocharger. High specific output, but timing chain and supercharger clutch are known weak points. Regular maintenance is essential.
Twincharger in a Van
The BLG Twincharger with DSG was prone to gearbox problems and made no sporting sense as a van engine.
Engine Weaknesses 5
Timing chain and chain tensioner of the early EA111 TSI are undersized. Chain stretch causes timing offset; in extreme cases valves contact pistons.
Symptoms: Rattling on cold start, rough idle, MIL with camshaft correlation error
Under high load and low rpm, uncontrolled pre-ignition (LSPI) can cause piston damage. Particularly affects vehicles with chip tuning or low-quality fuel.
Symptoms: Metallic knocking under full load, power loss, compression loss on one cylinder
The electromagnetic clutch of the supercharger wears out and no longer engages reliably. Power gap in the lower rev range as only the turbo is still working.
Symptoms: Power gap below 2,500 rpm, no longer audible supercharger whine, sluggish takeoff
Ignition coils fail individually, especially under high thermal stress from the twincharger setup. Leads to misfires and rough running.
Symptoms: MIL flashing, misfire on one cylinder, rough running, fuel smell
The turbocharger wastegate flap develops play and rattles at low rpm. No power loss, but annoying noise. Actuator readjustment or replacement required.
Symptoms: Metallic clattering/rattling at 1,200–1,800 rpm, especially at idle
Vehicle Weaknesses 9
The 7-speed DSG (DQ200, dry clutch) shows juddering on take-off, delayed shifts, and in severe cases gearbox failure. Primarily affects build years 2008–2015. Regular oil changes every 60,000 km are critical.
The rear coil springs frequently break at the lowest coil due to corrosion. The problem occurs from around 80,000 km, but has also been documented at 38,000 km. Replace both sides simultaneously.
A faulty microswitch in the brake/rear fog light control unit simultaneously causes failures of the third brake light, the radiator fan (running continuously), and the windscreen wipers. Typical age-related defect.
The Touran 1T suffers from inadequate corrosion protection. Typical rust spots are the sills, front wings, the tailgate around the number plate light, and the rear axle brake shields.
Water enters the boot or footwell through porous seals on the tailgate and sunroof drain. Common causes: blocked drain hoses or a leaking third brake light.
The A/C compressor can fail at higher mileages. Refrigerant loss through leaking valves or a worn compressor is the common cause. Repair is costly.
Rear brake calipers can seize through rust and lack of maintenance, causing uneven pad wear and, in severe cases, overheated discs. Regular cleaning is recommended.
Electric window regulator motors wear out prematurely and seize. Track guides can crack. Typical wear from medium mileage onwards.
The headliner detaches on older vehicles due to moisture and UV ageing. Particularly in the B-pillar area and sunroof frame. Repair requires removing the entire headliner.