One problem related to cruise control has been reported for the 2008 Volvo S40. The most recently reported issues are listed below.
While driving on the highway I set cruise control to 65. Within seconds I felt as if I were going very fast and I had accelerated to near 90 mph. I turned cruise control off, stepped on the brake and when I let off the brake the car began to accelerate again. After the second time stepping on the brake the problem ceased. The same type of incident occurred again, only this time cruise control was not involved. Stopped at a red light, I stepped on the accelerator to make a right hand turn, the rpms immediately jumped and my car accelerated very quickly. I stepped on the brake and after a few seconds the issue resolved itself.
| Vehicle Speed Control problems | |
| Cruise Control problems |