I had the same problem on a 52 plate Megane. It was suggested that I went directly to a main dealer where all 4 were relpaced inside an hour. The technician who did the work explained to me that Renault ( and other manufacturers) knew of a faulty load of Sagem coils and rather that issue a recall would simply replace when they came in. I got Denso coils - no more problems. It was pointed out that it was best to renew all 4 and not just the one which had gone - as it cost me nothing I didn't complain.
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> If it's a deign flaw in Meganes and Scenics
Its not - its an industry wide problem. all sort of cars have been suffering coil problems in the last three years or so.
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TourVanMan TM < Ex RF >
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> If it's a deign flaw in Meganes and Scenics Its not - its an industry wide problem. all sort of cars have been suffering coil problems in the last three years or so.
That's not quite true. Very few of the Japanese brands have had coil problems. It is mainly Renault and VAG who've had recurrent problems and its down to the quality of the item.
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Aprilia's right; the pencil coils on the 16-valve Renaults are unique to them. There are three makers: Sagem [by far the worst - changed dozens;] Beru [better - but rare] and Denso [never changed one yet that wasn't drowned.] If they're before 330-3 date code; you can still wangle a free set.
The Scenics drip scuttle water onto the engine, that floods the plugholes and kills the coils; a basic design fault that doesn't help already hideously unreliable components at all.
VAG single coils are completely different and seem to be inadequately cooled; the later ones are better. BMW suffer from water ingress too and the Jag V8 ones just die for fun. Even Dodge Viper twin-spark ones suffer.
Plugholes are too hot and suffer too much vibration for what is essentially a coil and [often] an electronic amplifier. Saab started the idea in the 70's with the 4-way drop-in amp/coilpack. An elegant solution - but their dealers still sell two a day.....
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