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Ford Fusion Key Fob Programming

Updated 2026 2006–2020 15 model years

Programming steps, the battery it takes, and the exact replacement fob for every Ford Fusion model year we cover (2006–2020). Find your year in the table, then jump to the details for that generation.

Shop Ford Fusion key fobs on Amazon Match the FCC ID for your year (table below) before you buy.

Every Ford Fusion model year

Key fob programming method, fob type and battery for each Ford Fusion model year
Year Programming Key fob Battery
2020
  • Locksmith or dealer
Proximity Key, Transponder Key · 3/4/5-button CR2450 battery on Amazon
2019
  • Locksmith or dealer
Proximity Key, Transponder Key · 3/4/5-button CR2450 battery on Amazon
2018
  • Locksmith or dealer
Proximity Key, Transponder Key · 3/4/5-button CR2450 battery on Amazon
2017
  • Locksmith or dealer
Proximity Key, Transponder Key · 3/4/5-button CR2450 battery on Amazon
2016 Remote Head Key, Proximity Key, Transponder Key · 3/4/5-button CR2032 battery on Amazon
2015 Remote Head Key, Proximity Key, Transponder Key · 3/4/5-button CR2032 battery on Amazon
2014 Remote Head Key, Proximity Key, Transponder Key · 4/5-button CR2032 battery on Amazon
2013 Remote Head Key, Proximity Key, Transponder Key · 4/5-button CR2032 battery on Amazon
2012 Transponder Key, Remote Head Key · 3/4-button CR2032 battery on Amazon
2011 Transponder Key, Remote Head Key · 3/4-button CR2032 battery on Amazon
2010 Transponder Key, Remote Head Key · 3/4-button CR2032 battery on Amazon
2009 Transponder Key, Remote Head Key, Remote · 3/4/6-button CR2032 battery on Amazon
2008 Transponder Key, Remote Head Key, Remote · 3/4/6-button CR2032 battery on Amazon
2007 Transponder Key, Remote Head Key, Remote · 3/4/6-button CR2032 battery on Amazon
2006 Transponder Key, Remote Head Key · 3/4-button CR2032 battery on Amazon

2020 Ford Fusion

How to program your key fob

This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

2 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

2020 Ford Fusion 3/4-button Proximity Key, FCC ID M3N-A2C931423
3/4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931423, M3N-A2C93142300
OE part #
164-R8150, 164-R8159, 164-R8163, 164-R8187, 164-R8246, 164-R8295 +9 more
Frequency
315 MHz
Chip
47 HITAG PRO
2020 Ford Fusion 5-button Proximity Key, FCC ID M3N-A2C931426
5-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931426, M3N-A2C93142600
OE part #
164-R8149, 164-R8162, 164-R8275, 5929500, 5929505, HS7T-15K601-BC
Frequency
902 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Transponder Key

2 versions

A cut metal key with a chip in the head. No buttons.

2020 Ford Fusion Transponder Key, key blank IAX00012124
Transponder Key
Find on Amazon
Key blank
IAX00012124
OE part #
H128-PT, H128PT
Chip
HITAG PRO 128-BIT
2020 Ford Fusion Transponder Key, key blank N5F-A08TAA
Transponder Key
Find on Amazon
Key blank
N5F-A08TAA, N5F-A08TDA
OE part #
HU101

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2018–2019 Ford Fusion

How to program your key fob

This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

2 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

2018–2019 Ford Fusion 3/4-button Proximity Key, FCC ID M3N-A2C931423
3/4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931423, M3N-A2C93142300
OE part #
164-R8150, 164-R8159, 164-R8163, 164-R8187, 164-R8246, 164-R8295 +9 more
Frequency
315 MHz
Chip
47 HITAG PRO
2018–2019 Ford Fusion 5-button Proximity Key, FCC ID M3N-A2C931426
5-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931426, M3N-A2C93142600
OE part #
164-R8149, 164-R8162, 164-R8275, 5929500, 5929505, HS7T-15K601-BC
Frequency
902 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Transponder Key

2 versions

A cut metal key with a chip in the head. No buttons.

2018–2019 Ford Fusion Transponder Key, key blank BFD40-I
Transponder Key
Find on Amazon
Key blank
BFD40-I, N5F-A08TAA, N5F-A08TDA
OE part #
164-R7978, 5925267, FD40, HU101, HU101T
2018–2019 Ford Fusion Transponder Key, key blank IAX00012124
Transponder Key
Find on Amazon
Key blank
IAX00012124
OE part #
H128-PT, H128PT
Chip
HITAG PRO 128-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2017 Ford Fusion

How to program your key fob

This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

2 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

2017 Ford Fusion 3/4-button Proximity Key, FCC ID M3N-A2C931423
3/4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931423, M3N-A2C93142300
OE part #
164-R8150, 164-R8159, 164-R8163, 164-R8187, 164-R8246, 164-R8295 +9 more
Frequency
315 MHz
Chip
47 HITAG PRO
2017 Ford Fusion 5-button Proximity Key, FCC ID M3N-A2C931426
5-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C931426, M3N-A2C93142600
OE part #
164-R8149, 164-R8162, 164-R8275, 5929500, 5929505, HS7T-15K601-BC
Frequency
902 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Transponder Key

2 versions

A cut metal key with a chip in the head. No buttons.

2017 Ford Fusion 4-button Transponder Key, key blank BFD40-I
4-button Transponder Key
Find on Amazon
Key blank
BFD40-I, N5F-A08TAA, N5F-A08TDA
OE part #
164-R7978, 164-R7986, 5924003, 5925267, FD40, HU101 +1 more
2017 Ford Fusion Transponder Key, key blank IAX00012124
Transponder Key
Find on Amazon
Key blank
IAX00012124
OE part #
H128-PT, H128PT
Chip
HITAG PRO 128-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2015–2016 Ford Fusion

How to program your key fob

This Ford has two DIY remote types — match yours. A flip key (regular ignition) uses two working keys; a smart proximity key (push-button start) uses two working smart keys. Read your method through first.

Full steps: Ford Flip Key and Proximity Key Programming

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

4 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

2015–2016 Ford Fusion 4-button Proximity Key, FCC ID M3N-A2C31243800
4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C31243800, M3N-A2C31243801
OE part #
164-R8109, 164-R8120, 164-R8139, 164-R8143, 5926060, 5926063 +3 more
Frequency
315 MHz
Chip
NXP HITAG-PRO ID49 128 BIT
2015–2016 Ford Fusion 5-button Proximity Key, FCC ID M3N-A2C31243300
5-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C31243300
OE part #
164-R7989, 164-R7991, 164-R8106, 164-R8119, 5923896, 5923898 +6 more
Frequency
902 MHz
Chip
NXP HITAG-PRO ID49 128-BIT
2015–2016 Ford Fusion 3-button Proximity Key, FCC ID 1-WAY
3-button Proximity Key
Find on Amazon
FCC ID
1-WAY
OE part #
164-R8110, 5926059
Frequency
433 MHz
2015–2016 Ford Fusion 4-button Proximity Key, FCC ID M3N-A2C31227300
4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C31227300
OE part #
164-R7988, 5923895
Frequency
868 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2015–2016 Ford Fusion 4-button Remote Head Key, FCC ID BFD40-I
4-button Remote Head Key
Find on Amazon
FCC ID
BFD40-I, N5F-A08TAA, N5F-A08TDA
OE part #
164-R7978, 164-R7986, 5924003, 5925267, FD40, HU101 +1 more
Frequency
315 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Transponder Key

A cut metal key with a chip in the head. No buttons.

2015–2016 Ford Fusion Transponder Key, key blank IAX00012124
Transponder Key
Find on Amazon
Key blank
IAX00012124
OE part #
H128-PT, H128PT
Chip
HITAG PRO 128-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2013–2014 Ford Fusion

How to program your key fob

This Ford has two DIY remote types — match yours. A flip key (regular ignition) uses two working keys; a smart proximity key (push-button start) uses two working smart keys. Read your method through first.

Full steps: Ford Flip Key and Proximity Key Programming

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

2 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

2013–2014 Ford Fusion 5-button Proximity Key, FCC ID M3N-A2C31243300
5-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C31243300
OE part #
164-R7989, 164-R7991, 164-R8106, 164-R8119, 5923896, 5923898 +6 more
Frequency
902 MHz
Chip
NXP HITAG-PRO ID49 128-BIT
2013–2014 Ford Fusion 4-button Proximity Key, FCC ID M3N-A2C31227300
4-button Proximity Key
Find on Amazon
FCC ID
M3N-A2C31227300
OE part #
164-R7988, 5923895
Frequency
868 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2013–2014 Ford Fusion 4-button Remote Head Key, FCC ID BFD40-I
4-button Remote Head Key
Find on Amazon
FCC ID
BFD40-I, N5F-A08TAA, N5F-A08TDA
OE part #
164-R7978, 164-R7986, 5924003, 5925267, FD40, HU101 +1 more
Frequency
315 MHz
Chip
NXP HITAG-PRO ID49 128 BIT

Transponder Key

A cut metal key with a chip in the head. No buttons.

2013–2014 Ford Fusion Transponder Key, key blank IAX00012124
Transponder Key
Find on Amazon
Key blank
IAX00012124
OE part #
H128-PT, H128PT
Chip
HITAG PRO 128-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2012 Ford Fusion

Remote / key fob programming

Programming a remote on this Ford resets every remote for the vehicle, so you reprogram them all together. There are two common methods — try Method A first, and if it doesn't work use Method B. Do not press the brake pedal at any point.

Full steps: Ford Remote Programming: Reset and Relearn Every Remote

Key programming

You can add a new key to this Ford yourself if you already have two keys that start the engine. The new key must be cut first, and it has to be a genuine key — a cloned hardware-store key won't work.

Full steps: Ford Add a Key With Two Working Keys

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2012 Ford Fusion 3/4-button Remote Head Key, FCC ID CWTWB1U212
3/4-button Remote Head Key
Find on Amazon
FCC ID
CWTWB1U212, CWTWB1U322, CWTWB1U331, CWTWB1U345, CWTWB1U722, CWTWB1U793, CWTWBIU322, CWTWBIU331, CWTWBIU345, GQ43VT11T, OUC6000022, OUCD6000022
OE part #
15K60153309140, 15K601535093529138, 164-R7003, 164-R7004, 164-R7005, 164-R7006 +64 more
Frequency
315 MHz
Chip
TEXAS ID 4D 63 80 BIT

Transponder Key

5 versions

A cut metal key with a chip in the head. No buttons.

2012 Ford Fusion Transponder Key, key blank BH75
Transponder Key
Find on Amazon
Key blank
BH75
OE part #
BH75
2012 Ford Fusion Transponder Key, key blank FO25
Transponder Key
Find on Amazon
Key blank
FO25
OE part #
11196FD
Transponder Key
Find on Amazon
Key blank
AF00007290
2012 Ford Fusion Transponder Key, key blank FO-15DE
Transponder Key
Find on Amazon
Key blank
FO-15DE
OE part #
JMA-H75
2012 Ford Fusion Transponder Key, key blank H92PT
Transponder Key
Find on Amazon
Key blank
H92PT
OE part #
5944375, 5944486, H92-PT, H92PT
Chip
4D-63 80-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2010–2011 Ford Fusion

Remote / key fob programming

Programming a remote on this Ford resets every remote for the vehicle, so you reprogram them all together. There are two common methods — try Method A first, and if it doesn't work use Method B. Do not press the brake pedal at any point.

Full steps: Ford Remote Programming: Reset and Relearn Every Remote

Key programming

You can add a new key to this Ford yourself if you already have two keys that start the engine. The new key must be cut first, and it has to be a genuine key — a cloned hardware-store key won't work.

Full steps: Ford Add a Key With Two Working Keys

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2010–2011 Ford Fusion 3/4-button Remote Head Key, FCC ID CWTWB1U212
3/4-button Remote Head Key
Find on Amazon
FCC ID
CWTWB1U212, CWTWB1U322, CWTWB1U331, CWTWB1U345, CWTWB1U722, CWTWB1U793, CWTWBIU322, CWTWBIU331, CWTWBIU345, GQ43VT11T, OUC6000022, OUCD6000022
OE part #
15K60153309140, 15K601535093529138, 164-R7003, 164-R7004, 164-R7005, 164-R7006 +73 more
Frequency
315 MHz
Chip
TEXAS ID 4D 63 80 BIT

Transponder Key

5 versions

A cut metal key with a chip in the head. No buttons.

2010–2011 Ford Fusion Transponder Key, key blank BH75
Transponder Key
Find on Amazon
Key blank
BH75
OE part #
BH75
2010–2011 Ford Fusion Transponder Key, key blank FO25
Transponder Key
Find on Amazon
Key blank
FO25
OE part #
11196FD
Transponder Key
Find on Amazon
Key blank
AF00007290
2010–2011 Ford Fusion Transponder Key, key blank FO-15DE
Transponder Key
Find on Amazon
Key blank
FO-15DE
OE part #
JMA-H75
2010–2011 Ford Fusion Transponder Key, key blank H92PT
Transponder Key
Find on Amazon
Key blank
H92PT
OE part #
5944375, 5944486, H92-PT, H92PT
Chip
4D-63 80-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2007–2009 Ford Fusion

Remote / key fob programming

Programming a remote on this Ford resets every remote for the vehicle, so you reprogram them all together. There are two common methods — try Method A first, and if it doesn't work use Method B. Do not press the brake pedal at any point.

Full steps: Ford Remote Programming: Reset and Relearn Every Remote

Key programming

You can add a new key to this Ford yourself if you already have two keys that start the engine. The new key must be cut first, and it has to be a genuine key — a cloned hardware-store key won't work.

Full steps: Ford Add a Key With Two Working Keys

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2007–2009 Ford Fusion 3/4-button Remote Head Key, FCC ID CWTWB1U212
3/4-button Remote Head Key
Find on Amazon
FCC ID
CWTWB1U212, CWTWB1U322, CWTWB1U331, CWTWB1U345, CWTWB1U722, CWTWB1U793, CWTWBIU322, CWTWBIU331, CWTWBIU345, GQ43VT11T, OUC6000022, OUCD6000022
OE part #
15K60153309140, 15K601535093529138, 164-R7003, 164-R7004, 164-R7005, 164-R7006 +73 more
Frequency
315 MHz
Chip
TEXAS ID 4D 63 80 BIT

Remote

A separate key fob that only handles locking and unlocking.

2007–2009 Ford Fusion 6-button Remote, FCC ID GOH-PCGEN2
6-button Remote
Find on Amazon
FCC ID
GOH-PCGEN2
OE part #
8L3D-15K601-AA
Frequency
433 MHz

Transponder Key

5 versions

A cut metal key with a chip in the head. No buttons.

2007–2009 Ford Fusion Transponder Key, key blank BH75
Transponder Key
Find on Amazon
Key blank
BH75
OE part #
BH75
2007–2009 Ford Fusion Transponder Key, key blank FO25
Transponder Key
Find on Amazon
Key blank
FO25
OE part #
11196FD
Transponder Key
Find on Amazon
Key blank
AF00007290
2007–2009 Ford Fusion Transponder Key, key blank FO-15DE
Transponder Key
Find on Amazon
Key blank
FO-15DE
OE part #
JMA-H75
2007–2009 Ford Fusion Transponder Key, key blank H92PT
Transponder Key
Find on Amazon
Key blank
H92PT
OE part #
5944375, 5944486, H92-PT, H92PT
Chip
4D-63 80-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2006 Ford Fusion

Remote / key fob programming

Programming a remote on this Ford resets every remote for the vehicle, so you reprogram them all together. There are two common methods — try Method A first, and if it doesn't work use Method B. Do not press the brake pedal at any point.

Full steps: Ford Remote Programming: Reset and Relearn Every Remote

Key programming

You can add a new key to this Ford yourself if you already have two keys that start the engine. The new key must be cut first, and it has to be a genuine key — a cloned hardware-store key won't work.

Full steps: Ford Add a Key With Two Working Keys

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Remote Head Key

One piece: a cut metal blade with the lock/unlock buttons built into the head.

2006 Ford Fusion 3/4-button Remote Head Key, FCC ID CWTWB1U212
3/4-button Remote Head Key
Find on Amazon
FCC ID
CWTWB1U212, CWTWB1U322, CWTWB1U331, CWTWB1U345, CWTWB1U722, CWTWB1U793, CWTWBIU322, CWTWBIU331, CWTWBIU345, GQ43VT11T, OUC6000022, OUCD6000022
OE part #
15K60153309140, 15K601535093529138, 164-R7003, 164-R7004, 164-R7005, 164-R7006 +65 more
Frequency
315 MHz
Chip
TEXAS ID 4D 63 80 BIT

Transponder Key

5 versions

A cut metal key with a chip in the head. No buttons.

2006 Ford Fusion Transponder Key, key blank BH75
Transponder Key
Find on Amazon
Key blank
BH75
OE part #
BH75
2006 Ford Fusion Transponder Key, key blank FO25
Transponder Key
Find on Amazon
Key blank
FO25
OE part #
11196FD
Transponder Key
Find on Amazon
Key blank
AF00007290
2006 Ford Fusion Transponder Key, key blank FO-15DE
Transponder Key
Find on Amazon
Key blank
FO-15DE
OE part #
JMA-H75
2006 Ford Fusion Transponder Key, key blank H92PT
Transponder Key
Find on Amazon
Key blank
H92PT
OE part #
5944375, 5944486, H92-PT, H92PT
Chip
4D-63 80-BIT

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

2006, 2007–2009, 2010–2011, 2012, 2013–2014, 2015–2016
CR2032 battery on Amazon
2017, 2018–2019, 2020
CR2450 battery on Amazon

2006, 2007–2009, 2010–2011, 2012, 2013–2014, 2015–2016 Ford Fusion key fob battery

Your 2006, 2007–2009, 2010–2011, 2012, 2013–2014, 2015–2016 Ford Fusion key fob uses a CR2032 3V lithium coin cell. A fresh one typically lasts 3–5 years.

Buy Energizer CR2032 Lithium Coin Batteries (4-pack) on Amazon

How to replace the battery

  1. 1 Look for a small notch or screw on the side of the fob where the key blade meets the buttons.
  2. 2 Pry the housing apart with a coin or small flathead (or remove the screw).
  3. 3 Pop out the old coin cell, noting its orientation.
  4. 4 Insert the new battery the same way up, then snap the case shut.
  5. 5 Test the buttons — if they work, you're done.

Battery tips

  • Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
  • Try not to touch both faces of the new battery; skin oils shorten its life.
  • If the buttons still don't respond after a new battery, the remote may need re-syncing or programming.

2017, 2018–2019, 2020 Ford Fusion key fob battery

Your 2017, 2018–2019, 2020 Ford Fusion key fob uses a CR2450 3V lithium coin cell. A fresh one typically lasts 3–5 years.

Buy Energizer CR2450 Lithium Coin Batteries (2-pack) on Amazon

How to replace the battery

  1. 1 Slide the release latch and pull the metal emergency key out of the fob.
  2. 2 Use that key (or a coin) to pry the two halves apart at the seam.
  3. 3 Lift out the old coin cell — note which side faces up.
  4. 4 Drop in the new battery the same way (printed + side usually faces the back cover).
  5. 5 Press the case back together until it clicks, then test lock/unlock and push-to-start.

Battery tips

  • Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
  • Even with a dead fob battery you can usually still start the car by holding the fob against the start button — check your owner's manual.
  • If the fob still won't work after a new battery, it may need re-syncing or programming.

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