Historical precedent: Free shutter replacement on Nikon D750

There was a famous case in the history of Nikon when the company admitted a factory defect in the shutter block on the legendary full frame **Nikon D750** (batch released from 2014 to 2015).

At some shutter speeds when shooting in bright sun, the upper part of the frame was blocked by a black stripe from bouncing curtains, throwing out the `Err` error.

As an engineer who worked with these carcasses, I will analyze how this recall campaign worked.

Nikon D750 service review: What did the company do?

1. Free shutter replacement regardless of warranty:Nikon has officially announced that it will change bolt block is absolutely **free** on any carcasses from the defective series of serial numbers, even if the warranty ended 5 years ago, and the mileage was 180,000 frames!
2. Resetting the counter to zero:When officially replacing the shutter due to a service recall, authorized centers did a software reset of the `ShutterCount` tag to zero.

How to check if a camera is subject to review?

Our web service report reads the **SerialNumber** tag from the MakerNote frame. By checking the received serial number with List of Nikon service bulletins, you can find out if the shutter on your D750 was replaced under warranty!

Nikon Recall Table

Model Nikon	Reason for service recall	Service replacement status
Nikon D750 (Batch 2014-2015)	Shading the frame with a curtain / Err	Free shutter replacement at ASC
Nikon D600	Oil drops from the shutter on the matrix	Replacing the shutter with a unit from D610
Nikon D810/D850	No mass defects of shutters were recorded	Standard paid replacement due to wear and tear