In a tight first-half characterised by a number of thundering tackles, Kaiserslautern had the lion's share of possession but found it difficult to break down a deep-lying home side.
Smash and grab
The visitors increased their control after the break, with set-pieces and long-range shots almost leading to goals on various occasions, but after withstanding the Red Devils' pressure, Sandhausen's No9 Frank Löning earned the hosts a valuable win with a close-range finish in the 85th minute.
The victory lifts Sandhausen to ninth, while Kaiserslautern sink to seventh.
Line-ups and statistics