The lethargic Canaries were made to pay after spurning chances from Leon Barnett, who crashed a header off the post, and half-time substitute Grant Holt, who had a point-blank header saved by Mark Tyler.
The decisive moment came in the 80th minute when JJ O'Donnell crossed from the left to find Rendell, who slid in to find the net and earn Blue Square Premier Luton a place in the fifth round of the FA Cup - emulating Sutton, who beat Coventry in 1989.
- Sports & Recreation
- Leon Barnett
- Grant Holt