1999 Volkswagen Beetle Speed Sensor

Electrical problem
1999 Volkswagen Beetle 4 cyl Two Wheel Drive Manual 100k miles

My girlfriend has a 99' VW Beetle that she's currently being told she needs to replace her speed sensor in it. They are quoting her for $300+ and after a little looking around I saw that I could buy the part for at most 25% of that cost. I was wondering if you need any special tools to replace this or if I can just take it off and put a new one on, bam the end.