Description
Ignition Switch, Driver’s Door Lock And Two Keys For Peugeot 407 Vehicles. Keys May Be Damaged, But The Lock Functions Fully.
Product Overview
Complete ignition switch assembly with driver’s door lock cylinder and two keys designed for Peugeot 407 models. This assembly replaces the worn ignition barrel and the corresponding door lock cylinder, restoring reliable mechanical operation of the lock system. Ideal for professional mechanics and DIY enthusiasts who want a direct-fit replacement part that addresses common wear and key damage issues.
Key Benefits
- Direct Fit For Peugeot 407 – Designed To Match OE Mounting Points And Electrical Connections.
- Includes Two Keys – Useful Even If Key Blanks Or Heads Are Damaged, While The Lock Cylinder Remains Functional.
- Restores Smooth Ignition And Door Lock Operation – Eliminates Key Jamming And Intermittent Contact.
- Cost-Effective Repair – Replaces Multiple Components At Once (Ignition Barrel + Door Lock + Keys).
Function And Typical Symptoms
The ignition switch assembly houses the mechanical ignition barrel and may include the electrical switch contacts that feed the vehicle’s starter and accessory circuits. Typical symptoms indicating replacement are stiffness or jamming of the key, ignition not turning to start position, loose or worn key profile, and difficulty locking/unlocking the driver’s door. Because keys wear over time, the key head or plastic may be damaged while the metal profile can still operate the lock cylinder.
Replacement Procedure (Overview)
Replacement Should Be Performed By A Competent Mechanic Or An Experienced DIYer Familiar With Steering Column Work. Typical Steps:
- Disconnect The Battery Before Starting To Avoid Short Circuits And To Protect Electrical Components.
- Remove Steering Column Covers To Access The Ignition Barrel Mounting Screws.
- Detach Electrical Connectors Linked To The Ignition Switch (Noting Their Position For Reassembly).
- Unscrew And Remove The Old Ignition Barrel And Driver Door Lock Cylinder, Then Install The New Assembly.
- Verify Mechanical Operation Of The Keys In Both Door And Ignition And Reconnect The Battery.
- Test All Functions: Ignition Positions, Starter Engagement, And Door Lock Operation.
How Often They Fail And Why
Ignition Barrels And Door Lock Cylinders Wear Gradually. Failure Can Occur After Years Of Use—Common Causes Include Worn Key Profiles, Dirt And Debris In The Barrel, Corrosion, And Repeated Heavy Force When Turning Keys. Electrical Contacts In The Ignition Switch Can Also Degrade, Causing Intermittent Electrical Faults, Though The Mechanical Cylinder Often Outlasts The Switch Contacts.
Installation Recommendations
- Always Disconnect The Battery Before Removal And Reinstallation To Prevent Short Circuits And Protect Immobilizer/Electrical Circuits.
- Handle Keys And Lock Cylinder Carefully To Avoid Introducing Debris Into The Barrel.
- Inspect Wiring And Connectors For Damage While Accessing The Ignition Switch; Replace Any Frayed Wiring Or Corroded Connectors.
- After Installation, Confirm That Keys Turn Smoothly In Both The Ignition And Door Lock And That All Electrical Functions Operate Correctly.
- If Immobilizer Or Key Transponder Issues Occur After Fitment, Use Manufacturer Diagnostic Tools To Diagnose And Reprogram As Required.
Reason For Frequent Failure
The Most Common Cause Of Failure Is Mechanical Wear Of The Key Or Lock Cylinder Due To Long-Term Use And Dirt Infiltration. Repeated Use With A Worn Key Profile Accelerates Cylinder Wear And Can Lead To Jamming Or Slippage. Environmental Factors Such As Moisture And Corrosion Also Contribute, Particularly For Door Lock Cylinders Exposed To The Elements.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Peugeot 407
- Product Codes: 4162EQ, 4162EA
- Other Numbers: Not Provided
