In the last-ever Aviva Premiership match to be played at Vicarage Road, Farrell hammered over eight kicks from eight attempts while David Strettle and Charlie Hodgson collected second-half tries to help Saracens to a comfortable win.
The defeat leaves Sale five points behind London Irish at the foot of the table and they only had four Danny Cipriani penalties to show for their efforts.
However, Sale started the game on the front foot and led within five minutes thanks to a Cipriani penalty. Just after the restart, the fly-half got lucky when his kick from inside the 22 was charged down by George Kruis only for the ball to bounce over the dead ball line.
But Cipriani soon doubled the Sharks' lead when he belted over a terrific penalty from just inside his own half, although Saracens were to halve the deficit through Farrell. Five minutes later, Farrell brought the score level with another penalty, left-of-centre on the 22-metre line, after James Gaskell was penalised for not rolling away.
It was all Saracens at that point and they soon led for the first time with Farrell again deadly from the kicking tee, making a shot from 40 metres. The England man then repeated the trick just a couple of minutes later to extend the gap to six points, with Sale's discipline letting them down badly.
They were to gift Farrell another shot at goal in the 28th minute, one which he did not pass up and despite not threatening the Sale tryline, Saracens found themselves 15-6 ahead. Eleven minutes into the second half, Cipriani brought his team back within six points with a penalty made all the more kickable thanks to some Saracens backchat.
But within two minutes, those points were rendered meaningless with Farrell again making it look easy with his sixth penalty, taken from just inside the Sale half. Cipriani was to boot the visitors back within touching distance with an excellent, and somewhat fortuitous, strike from the halfway line which hit both posts before dropping over.
However, Saracens took a huge step towards victory in the 63rd minute - just after bringing on former Shark Hodgson. A strong scrum led to Richard Wigglesworth passing to Hodgson, who with his first touch gave a quick pass to allow Strettle to sprint in under the posts, giving Farrell an easy conversion.
The result was made safe with 10 minutes left and it was roles reversed from the first try as Strettle's deft grubber was simple for Hodgson to pick up and score. Farrell kicked the extras again and the gap was up to 20 points, meaning that Sale were going to go back up to Salford with nothing to show for their efforts.