Mercury Mariner Key Fob Programming by Year
Can you program a Mariner fob without the dealer? For most years, yes. Pick your year for the route and best next step.
Find your year
| Year | DIY onboard? | How it programs | Working fob? | Erase risk | Confidence | Best next step |
|---|---|---|---|---|---|---|
| 2007 | Yes | Yes - onboard relearn | No (all-keys-lost OK) | Possible | Med | Follow the steps below |
| 2008–2011 | Yes | Yes - onboard relearn | No (all-keys-lost OK) | Possible | Med | Follow the steps below |
Mercury Mariner key types & programming facts
For the 2007-2011 Mercury Mariner, key replacement centers on identifying the correct key/fob type and then using the vehicle’s onboard programming route where supported. Available sources show 2007 Mariner remote/keyless entry and remote-head key references, and they indicate at least one 2007-2011 remote-head option with FCC ID CWTWB1U793.
Key types used on the Mariner:
- transponder key (2007-2011)
- remote-head key (2007-2011)
Common fob FCC IDs: CWTWB1U345, CWTWB1U331, CWTWB1U793 — check the back of your fob; we confirm the exact variant on site.
2007 Mercury Mariner
Route verified — exact steps vary by trim/equipment
Route verified as onboard programming (no dealer needed). The sequences below are general route guidance — use them only if your vehicle shows the same prompts and controls. If the prompts don’t match, stop and call us.
Show the programming methods (14 steps)
Programming Steps (Ignition and Lock Confirmation)
Programming Steps (Remote Buttons and Timing)
Additional Troubleshooting and Replacement
Site Navigation and Legal
For the 2007 Mariner: Mariner key replacement & all compatible fobs →
2008–2011 Mercury Mariner
Route verified — exact steps vary by trim/equipment
Route verified as onboard programming (no dealer needed). The sequences below are general route guidance — use them only if your vehicle shows the same prompts and controls. If the prompts don’t match, stop and call us.
Show the programming methods (18 steps)
Programming prerequisites
Step-by-step programming (part 1)
Step-by-step programming (part 2)
Troubleshooting & replacement
For the 2008–2011 Mariner: Mariner key replacement & all compatible fobs →
How we validate this guide
Year coverage comes from our consolidated vehicle programming dataset. Route-level programming status is reviewed against internal route sheets and available manufacturer, security-access, and professional tool references. Exact button sequences are marked source-verified only when we have year/equipment-specific support; where a year is labeled “route verified, steps vary,” we confirm the exact fob, trim, and prompts before programming. Reviewed for route and safety by Mohammad H. Abdelhadi, ALOA-Certified Master Locksmith.
| Year | Route status | Exact steps |
|---|---|---|
| 2007 | Route verified | General guidance |
| 2008–2011 | Route verified | General guidance |
Common questions
What key type does a 2007-2011 Mercury Mariner use?
Sources show transponder key and remote-head key options for this model range.
Can the remote be programmed onboard?
Your prompt states the known programming route is onboard; the sources provided do not list the exact procedure, only that the correct fob/key type must be matched first.
How do I confirm the right replacement remote?
Match the vehicle year with the FCC ID or OEM part reference printed on the remote or listing. For this model range, sources specifically mention CWTWB1U345, CWTWB1U331, and CWTWB1U793.
Can you program a Mariner key fob without going to the dealership?
For most years, yes - the route is onboard relearn or an OBD tool, both of which a mobile locksmith handles at your location.
Does this program the remote only, or the transponder key too?
It depends on your key type. Tell us your FCC ID and we will confirm.
What if my year says professional programming required?
Those years need a programmer or security access; we bring the tool to you and program it on site.
How much does it cost?
It depends on year, key type, and whether you have a working key. Call (833) 439-8636 for a firm price before we dispatch.