What Are the Essential Steps and Considerations for Replacing a Door Lock Cylinder on Mercury Mountaineer?

When changing a lock cylinder, you should change all the door, liftgate, and ignition lock cylinders together, so that you do not have more keys. To fix, disassemble the faulty cylinder and assemble another with the help of a lock repair package. The steps involved in the removal can be followed and then the steps can be reversed to install the new cylinder.

OEM Mercury Mountaineer Door Lock Cylinder

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Mercury Mountaineer Ignition Lock Cylinder, Front Driver Side Part Number: 7C3Z-1521990-A
$49.00 MSRP: $70.10
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Product Specifications
- Other Name: Lock Cylinder - Less Keys; Front Left Door Lock Cylinder; Rear Liftgate & Tailgate Locks; Lock Cylinder; Lock Assembly; Lock Cylinder Assy; Lock Cylinder Less Keys; Door Lock Cylinder; Door Lock
- Position: Front Driver Side
- Replaces: F85Z-1521990-BA, 8L3Z-1521990-A, F85Z-1521990-BB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2001 Mercury Mountaineer | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
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Mercury Mountaineer Ignition Lock Cylinder Part Number: F87Z-7822050-EA
Product Specifications
- Other Name: Lock Cylinder With Keys
- Manufacturer Note: IGN, F/D, L/G, w/anti theft
- Replaced by: F87Z-7843432-CB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2001 Mercury Mountaineer | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
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Mercury Mountaineer Ignition Lock Cylinder Part Number: F87Z-7822050-DA
Product Specifications
- Other Name: Lock Cylinder With Keys
- Manufacturer Note: IGN, F/D, L/G, w/o anti theft
- Replaced by: F87Z-7843432-CB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2001 Mercury Mountaineer | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS

Mercury Mountaineer Door Lock Cylinder

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Mercury Mountaineer Door Lock Cylinder Parts and Q&A

Ignition Lock Cylinder, Front Driver Side
7C3Z-1521990-A
Q: What Are the Essential Steps and Considerations for Replacing a Door Lock Cylinder on Mercury Mountaineer?
A: When changing a lock cylinder, you should change all the door, liftgate, and Ignition Lock Cylinders together, so that you do not have more keys. To fix, disassemble the faulty cylinder and assemble another with the help of a lock repair package. The steps involved in the removal can be followed and then the steps can be reversed to install the new cylinder.