Renault Laguna III - 2.0dCI Sport Tourer Owner's Review - madf
The trouble with cam chains is they are often very susceptible to A> abuse - they do NOT like delayed oil changes or B> bad designs - see BMW 1 series.
Combine the two and bills for £350 for a cambelt is cheap, cheap cheap... nothing compared to £1,000 plus... (I diy'ed son's 1.0 Yaris due to prior abuse - and parts alone were £210...the car itself was cheap to reflect that)