Ford Motor Company today announced three separate product recalls impacting four models in its lineup. The recalls are unrelated, but impact the Ford Explorer, Ford F-650/F-750, Transit and Lincoln MKC.

The first safety recall is related to the Explorer and MKC. According to Ford, vehicles equipped with an engine block heater on the 2.3-liter EcoBoost four-cylinder may overheat while plugged in. The over-heating could result in an engine fire. As such, 2016 Explorers and 2015 and 2016 MKC’s with engine block heaters will be retrofitted with a new block heater and plug by the dealership. Most of the impacted units are in Canada, where engine block heaters are a more common option.

Ford’s other two recalls are both manufacturing related. The first, impacting the F-650 and F-750 medium duty pickups, is related to the parking brake. Ford claims the parking brake clips were incorrectly manufactured and allow too much movement of the truck when engaged. Dealers are instructed to replace the clips with corrected ones.

Lastly, the 2015 and 2016 Ford Transit is being recalled for side impact air bags that may have been incorrectly installed. The error could cause the air bags not to inflate properly. The recall only impacts low-roof models (Transit offers three roof heights).