Yugocana is very wrong.

Organ Donors die in Car Crashes and accidents, people code in the ambulance on the way to the hospital.

Some organs can even be harvested a few hours after death.

Copypasta:

How long do organs remain viable after death, and how are they matched to a recipient?The Heart: 4-6 hours In addition to medical urgency, blood type, and other biological factors, those waiting for a heart transplant are also matched based on location because of the critical timing for this organ. The heart is only viable for 4-6 hours. Body size is also significant in heart matching, as the donor’s heart must fit comfortably inside the recipient’s ribcage.

The Lungs: 4-6 hours Similar to heart matching, location and body size are important considerations in lung allocation since the lungs are viable 4-6 hours after donation. That information is combined with the above criteria to determine a donor recipient.

The Liver: 8-12 hours Candidates who need a liver transplant are assigned a MELD or PELD score (Model for End-Stage Liver Disease or Pediatric End-Stage Liver Disease) that indicates how urgently they need the organ. A donor liver is offered first to the candidate who matches the common matching criteria and has the highest MELD or PELD score. Location is also taken into consideration, but since the liver can function for a longer time (8-12 hours) outside of the body, it is able to travel farther than the heart and lungs.

The Kidneys: 24-36 hours Kidney allocation is heavily influenced by waiting time or how long the recipient has been listed for transplant. Fortunately, there is a bridge treatment for many in end-stage renal disease, called dialysis, which allows candidates to survive while awaiting a transplant. In addition, blood type, other biological factors, as well as the body size of the donor and recipient are always key factors. Medical urgency and location are also factors but less so than other organs, as the kidney can remain viable outside the body for 24-36 hours under the proper conditions.