Nissan Service Damage & Lack Of Support

I am the owner of a 2025 Nissan Qashqai Skypack (plate 34NTE***, VIN/chassis number SJNJ12TA0U2204***). On 25 June 2026 I had the standard 15,000 km periodic maintenance carried out as a paid service at Nissan’s authorized dealer Bostancıoğlu Otomotiv in Maltepe, Istanbul, even though my vehicle is still fully under the manufacturer’s warranty. Immediately at the first start-up after picking up the car from the service on 25 June 2026, at 14,277 km, I experienced severe performance problems that were not present before the maintenance. The vehicle showed significantly increased engine noise, strong juddering/stuttering, and a clear lack of throttle response. These issues appeared right away after the maintenance and make the car unpleasant and, in my view, potentially unsafe to drive, even though no warning lights were initially on. When I reported this, the service postponed the inspection until 8 July 2026, stating that they were busy, and left me to use a mechanically problematic vehicle in the meantime. During the second check on 8 July 2026, at 14,576 km, the technician test-drove the car and officially confirmed the severe juddering and stuttering. Despite this clear confirmation, the service advisor claimed that, because the check engine light was not on, identifying the root cause would take time and that they would need to seek technical support from Nissan’s international headquarters. Apart from opening a new job card with the wording “vehicle juddering while driving”, no concrete technical intervention, software update or partial repair has been attempted or proposed. Throughout this process, Bostancıoğlu Otomotiv refused to provide a courtesy or replacement vehicle, even though the problem clearly arose immediately after their maintenance operations. As a result, while my car remains unresolved at the service center, I am forced to cover all transportation costs out of my own pocket (taxis, rentals, etc.) just to maintain my daily routine. In addition, I have lost considerable business and personal time repeatedly traveling to and from the service center to deal with a problem that was created after the paid periodic maintenance. I have also contacted Nissan Turkey customer service about this situation. However, Bostancıoğlu Otomotiv has refused to discuss the matter properly by phone and has only responded via email, without offering any concrete solution, timetable, or support. My vehicle is still not repaired, my transportation needs are not being met, and there is no clear explanation of what went wrong during the service or how it will be permanently resolved. I request and expect from Nissan and Bostancıoğlu Otomotiv an urgent, full and permanent repair of all mechanical and performance issues that arose after the 25 June 2026 periodic maintenance, under warranty and without causing any financial loss or depreciation in the value of my vehicle. Until my car is fully and safely repaired, I expect the immediate provision of a suitable courtesy or replacement vehicle so that my ongoing transportation grievance is ended. In addition, I request a detailed written technical report explaining the root cause of the problem, what exactly went wrong during or after the maintenance, which interventions were carried out on my vehicle, and what kind of technical support was received from Nissan headquarters. I also request reimbursement of the service fee I paid for a 15,000 km maintenance that has left my car in worse condition, as well as compensation for my documented extra transportation expenses and the losses caused by the disruption to my work and daily life. I expect Nissan and Bostancıoğlu Otomotiv to take responsibility for this situation, to transparently explain the fault that occurred after the maintenance, and to resolve my grievance quickly and completely.