Authorities say the suspect sold the swipe at the Jerome Avenue and East Fordham Road subway stop on Thursday afternoon.
A 29-year-old man was trying to buy a MetroCard but the ticketing machines weren't working.
MORE NEWS: California woman who confronted innocent Black teen over phone theft in New York City has been arraigned
That is when the suspect approached him and offered to sell him a swipe for $2 and the victim agreed.
After the victim passed through the turnstiles, the suspect grabbed his wallet from his pocket and ran off.
The victim's wallet contained a credit card and approximately $280.
Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
ALSO READ | Trump supporter who died from apparent trampling in US Capitol riots followed QAnon, family says
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip