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.
Worn injectors are quite common on most of today's diesel engines, whatever the make of the vehicle. That Nissan has already replaced some injectors under warranty on your vehicle, and has offered to pay half for the second set, suggests there is an issue. I would suggest you talk to a diesel mechanic who could give you more detailed information about the issue.
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.
Like every car company it would seem Nissan is doing everything in its power to reduce fuel consumption and holding on to higher gears for longer is a way to help do that. Go back to your dealer and ask if they can "retune" to get rid of the shudder.
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.