RE : your trekka website.

Nice idea, some inaccuracies.

The Trekka uses a Nissan derived hydraulic coupling rather than a viscous coupling to transmit drive to the rear wheels.  If the front and rear axles rotate at different speeds this causes a hydraulic pump to actuate a set of mini brake shoes within the coupling to lock the two axles together restoring drive.  The Scenic RX4 used a conventional disc/silicon fluid viscous coupling.

One of the big problems is owners who only replace a pair of tyres (usually fronts only) which creates a constant difference in axle speeds and eventually overheating and failure of the coupling.

Always replace all four tyres at the same time to avoid damaging the coupling.  Typical symptom is a sort of metallic rattle from the coupling when turning on full lock. Very noticeable in a multistory car park and may be accompanied by tyre squeal if the coupling has seized.

On petrol engine variants with K4M engine, if you suffer from poor cold start/warm up and stalling: remove the motorised throttle body and clean the unit with carburettor cleaner. Be sure to remove all traces of carbon from the throttle disc and the venturi housing. Refit the hosuing and all should now be well.

If the engine cranks but fails to start it is usually the TDC sensor, there is a modified sensor and section of loom available.

Engine misfires: if your engine suddenly loses power and sounds like it is running on three cylinders, along with lighting up the MIL lamp. You have a defective ignition coil. Replace all four coils at the same time to avoid a repeat performance in a few weeks time.  The original coils had a manufacturing defect and some may still be out there.

there's a few tips from my own experiences of owning a 2002 trekka 1.6 petrol.

regards

Richard