DPF, downpipe, flexi-pipe and broken section, just before the second CAT removed. New flexi-pipe welded in and, apparently, plates welded on to repair the crack in the pipe near the second CAT. Now running nice and quiet again. Total cost, £200. To replace the DPF Filter could cost you between £800 – £1500 (+Labour & VAT) and the warranty is usually for 1 or 2 years by the manufacturer. DPF Chemical Cleaning Session – There are many companies that offer to “clean” the DPF with additives or taking it off and jet-washing it but rarely are successful. At the same time as the DPF clean, I replaced the Exhaust Gas Pressure Sensor No1 as there are reports that this sensor can cause P2262 faults. Many people on forums have reported that replacing this sensor cured their faults. Mazda have upgraded this part due to unspecified problems so I thought it was worth a shot. If you don't maintain the DPF properly, excess soot can damaged the DPF beyond repair. If this is the case, it has to be replaced - and they're very expensive. A new DPF can cost anywhere from £1000 up to £3500. There are DPF suppliers that charge less, but make sure they have the correct Type Approval or they may not work properly and end up The estimated cost to maintain and repair a Mazda 6 ranges from $95 to $4470, with an average of $292. Car. Service. Estimate. Shop/Dealer Price. 2008 Mazda 6 V6-3.0L. Service type. Headlight Bulb - Passenger Side Low Beam Replacement. Estimate. YyfCwt5.