The 84-year-old man who died in hospital from his injuries after a crash in Newtownabbey on Sunday was Gerald Horner.
Police confirmed the man died as a result of injuries sustained in a road traffic collision on the Mallusk Road on January 4.
Mr Horner was from the Newtownabbey area and died in hospital on Monday January 5.
Police are appealing for witnesses to the collision, involving a Volkswagen Polo and Vauxhall Vectra that happened at around 11.45am.
The engine of a Volkswagen Polo was ripped out and landed more than 60ft away on a grass area following the crash at the junction of Mallusk Road and Park Road.
Alliance councillor John Blair for Newtownabbey expressed his sympathy after death of the pensioner.
He said: "My thoughts and sympathies are with the victim and his extended family and friends at this time.
“As we start a new year we must all get serious about preventing deaths on our roads. 2014 saw a particularly high number of tragedies on our roads, with one death being one too many.
"I would urge all road users to remain vigilant and exercise caution as we continue into the New Year.”
Inspector Alexander Johnston is appealing for anyone who witnessed the collision or anyone who was travelling on the Mallusk Road around the time of the collision to contact the Collision Investigation Unit in Steeple Police Station or local Police in Newtownabbey on the non-emergency number 101.