Common Problems with the
2003–2011 MG Rover MG TF / MGF

The K-Series engine is prone to head gasket failure. The mid-engine layout and long coolant pipes to the front radiator make the cooling system even more critical.

The front and rear subframes on the MGF and TF are modified Rover Metro pressings, originally coated with only thin paint. Once that coating degrades the mild steel rusts from within the box sections, and the front subframe mounting brackets to the body are a common corrosion point. Salt and damp on UK cars can perforate the subframe mountings - an MOT prescribed-area failure - requiring welded patch repairs, or full subframe removal and expensive labour if access is poor.

The K-Series engine sits behind the cabin, so coolant pipes run the full length underneath the car to the front radiator. The original steel pipes rust at their brackets, and if they pierce the engine loses coolant, overheats rapidly and can blow the head gasket. Stainless-steel replacement pipes cure the leak, but the long, low run is hard to inspect and remains a recurring issue on neglected UK examples.

The foam gaskets around the TF's rear light clusters are known to perish, letting water into the boot and soaking the carpets, and the MGF/TF can also leak at door and windscreen seals or through a damaged soft top. Damp footwells and boot carpets corrode the floor from beneath and can damage electrical components, while a persistently damp interior is hard to dry out in the UK climate.