The convertible top may have problems with the micro-switches and potentiometers that help control the raising and lowering of the top.
Several issues occur with the door locks on the Volvo C70 and most are because of the door lock assembly. What happens is that one door will not lock while the other one does. In other cases you will lock the doors and then one of the doors will immediately unlock.
The problem is that the door lock assembly is defective and will need replacement. Replacement of this assembly on the C70 is very difficult and is not recommended by a novice. Getting the door and window aligned properly so that you don't get air or water leaks is very, very difficult.
While driving the 2011-2013 Volvo C70, operators may notice harsh shifting or slippage of the transmission .
This is caused by software issues in many cases, however, internal transmission failure may be the culprit as well.
In some instances, the failure has been attributed to the ‘sealed-for-life’ nature of the transmission, as the transmission fluid may break down before the transmission is taken out of service.
The manufacturer of the transmission, which is a third party, has issued many software updates, but when these updates fail to correct concerns, the transmission must be removed, disassembled, inspected, and repaired.
The anti-lock brake system (ABS) control unit has a high failure rate. When this fault occurs, the ABS light will illuminate and codes may be stored indicating a problem with the ABS pump motor , or wheel speed sensors , but the problem is the ABS control module.
Other symptoms may include an illuminated check engine and transmission shift light, and the speedometer may stop working as well.
Note: The brake system will operate normally however during a panic stop the anti-lock brakes will not work and the wheels may lock-up, causing a lack of vehicle control under these situations.