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Lincoln MKZ Problems

RepairPal has identified the most common problems with the Lincoln MKZ based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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6
Known Problems

The automatic transmission may develop shifting concerns. On lower mileage vehicles, upgrading the software in the powertrain control module (PCM) and the transmission control module (TCM) may correct the problem. As the mileage increases, internal transmission damage can occur. Repairs could involve replacement of the valve body or a complete transmission rebuild. Whenever major transmission repairs are made, it is important to be sure the PCM and the TCM have the latest software updates to help prevent these issues from reoccurring.

Model years 2007-2012 of the Lincoln MKZ using the 6-speed automatic transmission have been known to produce hard shifting and transmission slippage between gears. This is most noticeable when the transmission is hot, but can happen at any time. Note, this transmission is designed to be ‘sealed for life’ meaning the transmission fluid is never meant to be changed.

As many drivers and owners have learned, the issues are caused by problematic software for the transmission or mechanical failures associated with the transmission valve body or shift solenoids.

In order to restore transmission performance while shifting, the manufacturer of the transmission has issued several software updates that should correct the shifting issues. If hard shifts and slippage still exist after the software updates are completed, the transmission must be removed, disassembled, inspected and repaired.

 

Some technicians have advised replacing transmission fluid at normal intervals, but the manufacturer guidance is to use the original transmission fluid for the entire service life of the vehicle. 

The power steering may leak fluid at the pump, hose, or steering gear. This can be caused by one or more hoses not being clamped tightly enough. The repair involves adding new clamps and seals to the power steering hoses at the pump and steering gear.

A coolant leak may develop from the heater core. The failure may be due to electrolysis. Our technicians recommend to check for voltage in the coolant with the battery disconnected. If voltage is found the cooling system should be flushed and jumper wires added to engine ground straps as necessary.

The trunk lid may not latch closed, this is generally caused by the trunk latch sticking in the open position. Our technicians tell us that in most cases the trunk latch assembly will need to be replaced to correct this issue.