Warranty - Null & Void due to modifications

bromers · 03-07-2010, 08:57 AM

My car went into 'slow down' mode on the motorway on my to work, came off at the next junction and it was fine again. Did the same on the way home and engine management light came on.

Drove it to the dealers, workiing fine apart from running a little rough. After 4 weeks they had replaced 2 DME control units, iginition packs, an actuator and a sensor. Car still wouldn't go so a week later, they then find out no compression on two cylinders - 2 pistons have gone and cylinder head needs replacing. Car had been hooked upto Head Office for a few days and then this week they came back and said warranty invalid because it had had an non standard exhaust fitted at some stage (was noted on the last service).

Car's been with them 8 weeks now. Still a slight hope of some goodwill - car's done 28k - full BMW service history (every 12-18 months).

Does anyone think a Milltek backbox (probably on the car for 3 yrs) could have caused all of the above faults ???

03-07-2010, 08:57 AM	#11
bromers S4 - Getting the hang of it Join Date: May 2009 Location: UK Posts: 189 Casino cash: $4347	My car went into 'slow down' mode on the motorway on my to work, came off at the next junction and it was fine again. Did the same on the way home and engine management light came on. Drove it to the dealers, workiing fine apart from running a little rough. After 4 weeks they had replaced 2 DME control units, iginition packs, an actuator and a sensor. Car still wouldn't go so a week later, they then find out no compression on two cylinders - 2 pistons have gone and cylinder head needs replacing. Car had been hooked upto Head Office for a few days and then this week they came back and said warranty invalid because it had had an non standard exhaust fitted at some stage (was noted on the last service). Car's been with them 8 weeks now. Still a slight hope of some goodwill - car's done 28k - full BMW service history (every 12-18 months). Does anyone think a Milltek backbox (probably on the car for 3 yrs) could have caused all of the above faults ???