Are you having problems with your Nissan? Let our team of motoring experts keep you up to date with all of the latest Nissan issues & faults. We have gathered all of the most frequently asked questions and problems relating to the Nissan in one spot to help you decide if it's a smart buy.
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We haven't heard of the problem you report, and haven't observed it on any of the Navaras we have driven, but maybe other owners could give us their experience of the car. It could, no doubt, be fixed once the cause is identified.
From what you say it would appear the engine output is below what it should be, and the high fuel consumption would seem to reflect that. The output should be 118 kW at 3200 rpm and 380 Nm at 2000 rpm. Persist with the dealer, and Nissan, the company has a responsibility to fix your car. Your idea of having a Nissan rep ride with you as you demonstrate the problem is a good one.
Talk to a senior manager at the dealership and ask for a report on what they're doing to fix your car and a timetable for when you will be able to get it back. If that is unsuccessful, go to Nissan and make the same demands. To step it up from there you could approach Consumer Affairs and enlist their help. You could also demand the use of a loan car while yours is being fixed. The service you have received has been nothing short of disgraceful.
The solution has to come from Nissan, so that's where you need to direct your concerns. I would seek a meeting with the dealer and express your concerns directly to the service manager, and request that a Nissan factory rep drive your car. Go along on the ride as well. The fact that your car is using more fuel than it should suggests that it is down on power.
It's obviously having a problem when working hard under load. Start by checking the radiator for rubbish blocking the core, look for leaks around the radiator, hoses and fittings. Have the dealer pressurize the cooling system to see if there are any leaks under pressure. Make sure they used the correct coolant.
I'd be looking at the injectors, particularly as the noise was there when the engine was cold. Worn injectors are a common issue with today's diesels.