Hello together, my wife is driving a Hyundai 1.0 T-GDI i30 Kombi (PDE) 120hp as our family flicker. We bought the car in 2019 as a day car and now the 5th inspection is on the car. Introduction / Context Unfortunately, we have had very bad experience with the contract workshop where we were originally, because too much oil was filled in and filters were not changed. In the case of two warranty cases, in which leaky Simmerrings and others oil on the clutch disc n came, you wanted to have an own share of 600€. First contact with Hyundai and great tenacity then led to the repair of the defects also free of charge. All other maintenance repairs (brakes, …) I do now by myself, only during the inspection we drove until the accumulation of the last incidents always to the Hyundai dealer to keep the guarantee. Now to the actual point My wife has now at a free workshop regarding the small inspection In addition to the oil change, the spark plugs should also be changed. As an offer we then received a cost estimate of 480€, which I find very happy. Reason of the workshop: The spark plugs would be so expensive and the change quite elaborate. I have now briefly researched what should be so expensive at the ZK change and find this rather humbug. If only the cardboard and ignition coils / pins are removed, then the one laughs at. What is more credible are the Pre ise for the candles. 135€ (rounded) with shipping, for 4 candles on the Hyundai accessory side. Actually I only need three. From NGK there is the ILKR9Q7G, which should fit according to OE number. Since I always do everything myself on the cars and (thank God) could do without the TÜV and the last inspections on workshops, I am not sure how I should estimate the price from 480€.My questions: 1. Is the estimate for 480€ still in the frame and I r Do you think that’s too expensive? 2. Does anyone have experiences with the NGK spark plugs or should they rather be installed in original ones? I drive an old Astra G myself as a commuter car, where I always had good experiences.