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Mazda CX-5: lost key, dead fob or locked out?

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Which CX-5 fob you have, how to open the driver's door and start the engine when it dies, and how to get the liftgate open from inside.

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The Mazda CX-5

Mazda Canada says the CX-5 debuted in 2012 and passed 300,000 Canadian sales by July 2025, with 28,288 sold in Canada in 2025.[1][2]

It comes in three generations: 2013–2016, 2017–2025, and the 2026 model, which Mazda Canada calls the "third generation" and which reached Canadian retailers in March 2026.[3][4][8][30][35]

Every Canadian owner's manual from 2013 to 2026 describes push-button start and a fob holding a mechanical "auxiliary key". Mazda's U.S. bulletin 01-011/18 (2013–2018 models) says that key "cannot be used to start the engine", and no manual mentions a key cylinder on the liftgate.[5][6][61][7][8][9][10][11][12][13][14][15][16][17][22]

Which key does your Mazda CX-5 use?

Model yearsKeyStartWorth knowing
2013–2016 (1st gen)Proximity fob with auxiliary key; CR2025Push button on every modelKey pulls straight out (2013–15) or releases with a knob (2016). Liftgate strut recall 2016-431.[5][7][18]
2017–2019 (2nd gen)Fob with knob-release auxiliary key; CR2025Push buttonPower liftgate first appears in the 2017 manual.[8][10]
2020 (2nd gen)Type A fob (CR2025) or new Type B fob with a lower cover (CR2032)Push buttonType B adds a power-saving mode. Mazda at first could not cut its auxiliary key from the key code (U.S. bulletin).[11][23]
2021–2025 (2nd gen)Fob with auxiliary key behind a lower cover; CR2032 onlyPush buttonAdvanced keyless on some models.[12][16]
2026 (3rd gen)Fob with cover-and-knob auxiliary key; CR2032Push buttonCanada: advanced keyless from the GS trim; hands-free power liftgate with the GT Premium Package.[3][17]

Not sure which generation you have? The model year is on your ownership (vehicle permit).

Dead fob, locked out or trunk stuck: what the owner's manual says

Hidden auxiliary key in the fob (2013–2026)

2013–2015 fobs: pull the key straight out. 2016–2019 fobs and the 2020 Type A fob: press the knob and pull. 2020 Type B fob and 2021: remove the lower cover while pressing the knob. 2022–2025: remove the lower cover while sliding the knob. 2026: remove the cover while pressing the knob. The key locks and unlocks the doors only; Mazda's U.S. bulletin 01-011/18 says it cannot start the engine.[5][7][8][11][12][13][16][17][22]

Opening the driver's door with it

Turn the key toward the front to lock and toward the back to unlock. A brief turn unlocks the driver's door only; holding it about one second unlocks all doors (2013, 2017 and 2020 manuals). The 2026 manual says to pull the door handle while inserting the key. If the theft-deterrent system is armed, unlocking with the key sets off the horn and hazard lights for about 30 seconds (2020 and 2026 manuals).[5][8][11][17]

Starting with a dead fob battery

Press the brake. When the start-button light flashes green, touch the button with the back of the fob, then press it once the light stays green (2013 and 2017 manuals). With the 2020 Type B fob and later, line up the centre of the fob's emblem with the button instead (2020, 2025 and 2026 manuals). With the 2020 Type B fob and later, pressing lock four times in 3 seconds and then holding it turns on a power-saving mode that disables proximity entry and keyless start (2020 and 2026 manuals); Mazda's U.S. bulletin SA-004/25 (2020–2025 with advanced keyless) says this can look like a no-start.[5][8][11][16][17][27]

Fob battery: CR2025 or CR2032

CR2025 for 2013–2019; CR2025 (Type A) or CR2032 (Type B) in the 2020 manual; CR2032 only in the 2021–2026 manuals. Mazda's U.S. bulletin SA-046/19 warns that a CR2025 in the newer fob "may cause a malfunction".[5][6][7][8][9][10][11][12][13][14][15][16][17][26]

Fob locked inside

A key left inside has its functions temporarily suspended to prevent theft; pressing a button on it restores them (2013 and 2026 manuals; the 2026 manual says the unlock button). If the doors are locked with the key inside and everything closed, they unlock again and a beep or the horn warns (2017 and 2026 manuals).[5][8][17]

Liftgate will not open: the inside lever

For a dead battery or electrical fault: on 2013–2016 models, remove the cap on the inside of the liftgate and turn the lever. 2017–2025: remove the same cover and turn the lever, or on power-liftgate models push the liftgate while pressing the lever down. 2026: fold the rear seatbacks, remove the cover and move the lever.[5][8][11][16][17]

Lost key and the key code plate

Keep the key code number plate out of the car; a replacement auxiliary key is made from it (2013 and 2026 manuals). If a key is lost, the dealer resets the codes of the remaining keys, so bring them all (2026 manual). No CX-5 owner's manual from 2013 to 2026 describes an exterior door keypad.[5][6][61][7][8][9][10][11][12][13][14][15][16][17]

Recalls involving locks, latches or keys

RecallModel yearsWhat it covers
2016-431 (Transport Canada)2013–2016The outer tube of the rear liftgate stay may corrode and break off; dealers replace both stays. Transport Canada lists 183,808 affected units across all the Mazda models in the recall.[18][19]
16V644000 (NHTSA, U.S.)2013–2016The same recall for U.S. CX-5s built December 15, 2011 to December 26, 2015: the liftgate "may drop unexpectedly".[21]
None listed2013–2026As of September 30, 2026, the Transport Canada and NHTSA databases list no other lock, key, latch or ignition recall for these years.[20][21]

To check whether your own vehicle has an open recall, enter its VIN on the manufacturer's recall page — Transport Canada lists them here. To browse recalls by make, model and year, use the Transport Canada recalls database.

Known problems and what owners report

Cutting a key when all are lost (U.S. bulletins)

For the new-style 2020 fob, Mazda at first had no way to cut auxiliary keys by code; with every key lost, the fix was to replace the door key cylinder set (SA-045/19, SA-004/20). SA-005/26 (January 2026) supersedes both. In its words, "2019 and newer models require a 10-digit key code", only Mazda-approved machines can use it, and the 5-digit code from the key tag or driver's door lock cylinder "is not sufficient".[23][24][25]

Fob or door handle not responding (U.S. bulletins)

2021 CX-5s built before October 5, 2020: pressure can deform the fob's battery terminals so it will not lock, unlock or start; Mazda modified the fob (09-019/26). 2013–2017: when the fob or a door request switch does not work, or the locks keep cycling on approach, the repair checks the outer door-handle connector for corrosion (SA-040/17).[28][29]

Liftgate faults (U.S. data)

Bulletins cover a corroded opener-switch connector (2013–2014 built before October 2, 2013; 09-035/14), half-latching below freezing (2014–2016 built October 1, 2013 to February 28, 2015; 09-044/16), a liftgate that will not unlatch, diagnosed through door-lock data, with a corroded door lock/latch replaced (2013–2022; SA-050/22) and, on 2020–2024 power-liftgate models with the "7th generation" fob built before December 1, 2023, the fob's liftgate button pressed by accident in a pocket (09-022/24b, whose warranty note lists Canadian 2022–2024 CX-5s). Unverified owner complaints to NHTSA include 2015 liftgates falling on a person, power liftgates opening by themselves (2020, 2021, 2024), and a 2013 owner who can open the hatch only with the fob.[33][34][36][37][38][40][41][42][43]

Engine off but stuck in accessory mode (U.S. data)

A worn shifter switch (2013–2014 built before December 27, 2013; 05-004/16) or a shifter lock-release button sticking in the cold (2014–2016, and 2017–2018 built before April 2, 2018; 05-001/19) can leave the car in accessory mode. One 2014 owner told NHTSA the vehicle then could not be locked.[31][32][39]

Theft and key security

The CX-5 is not on Équité Association's top-10 most-stolen lists for Canada or Ontario from 2019 to 2024: not the main list for each year, and not the theft-frequency lists for Ontario (2022–2024) or Canada (2024). Absence from a top-10 list is not a theft rate.[44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59]

Wired (2016, third-party news) reported that a list of keyless cars opened by a relay attack in a study by the German auto club ADAC included "Mazda's CX-5". The list focused on European models, and the article gives no model year.[60]

Mazda CX-5 keys — questions

Where is the hidden key in a CX-5 fob?

Inside the fob: it pulls straight out on 2013–2015 fobs, comes out with a knob on 2016–2019 and 2020 Type A fobs, and sits behind a cover from the 2020 Type B fob on. It locks and unlocks the doors only; Mazda's U.S. bulletin 01-011/18 says it cannot start the engine.

How do you start a CX-5 when the fob battery is dead?

Press the brake. When the start-button light flashes green, touch the button with the back of the fob, then press it once the light stays green (2013 and 2017 manuals). With the 2020 Type B fob and later, line up the centre of the fob's emblem with the button instead. Batteries: CR2025 for 2013–2019, CR2025 (Type A) or CR2032 (Type B) in 2020, CR2032 from 2021.

Is there a lock or liftgate recall on the CX-5?

Only on 2013–2016 models: Transport Canada recall 2016-431 (NHTSA 16V644000 in the U.S.) replaces both liftgate stays, whose outer tube may corrode and break off. As of September 30, 2026, the Transport Canada and NHTSA databases list no door lock, key, fob, ignition, hood-latch or immobilizer recall for 2013–2026 models.

Falcon Locksmith is an independent locksmith, not affiliated with or authorised by Mazda. Vehicle and product names belong to their respective owners and are used only to identify the vehicle.

Related help

Car LockoutKey Fob ProgrammingSmart KeysAll Keys LostSpare Car KeysIgnition Repair All Mazda keys →

Sources

  1. Mazda Canada — Mazda Reveals All-New 2026 CX-5 (2025)
  2. Mazda Canada — Sales for December and full-year 2025 (2026)
  3. Mazda Canada — Pricing and packaging for the all-new 2026 CX-5 (2026)
  4. Mazda Canada — All-new 2026 CX-5 arrives in market (2026)
  5. Mazda Canada — 2013 CX-5 Owner's Manual
  6. Mazda Canada — 2014 CX-5 Owner's Manual
  7. Mazda Canada — 2016 CX-5 Owner's Manual
  8. Mazda Canada — 2017 CX-5 Owner's Manual
  9. Mazda Canada — 2018 CX-5 Owner's Manual
  10. Mazda Canada — 2019 CX-5 Owner's Manual
  11. Mazda Canada — 2020 CX-5 Owner's Manual
  12. Mazda Canada — 2021 CX-5 Owner's Manual
  13. Mazda Canada — 2022 CX-5 Owner's Manual
  14. Mazda Canada — 2023 CX-5 Owner's Manual
  15. Mazda Canada — 2024 CX-5 Owner's Manual
  16. Mazda Canada — 2025 CX-5 Owner's Manual
  17. Mazda Canada — 2026 CX-5 Owner's Manual
  18. Transport Canada — Recall 2016-431 (queried 2026)
  19. Transport Canada — Vehicle recall database, recall 2016-431 summary (queried 2026)
  20. Transport Canada — Vehicle recall database, Mazda CX recalls by model year (queried 2026)
  21. NHTSA (U.S.) — Recalls for the Mazda CX-5 by model year, incl. 16V644000 (queried 2026)
  22. Mazda North American Operations — TSB 01-011/18, starting with the auxiliary key (2018)
  23. Mazda North American Operations — SA-045/19, auxiliary key cutting for the 2020 fob (2019)
  24. Mazda North American Operations — SA-004/20, auxiliary key cutting for the 2020 fob (2020)
  25. Mazda North American Operations — SA-005/26, key cutting and key codes (2026)
  26. Mazda North American Operations — SA-046/19, battery for the new fob (2019)
  27. Mazda North American Operations — SA-004/25, fob power-saving mode (2025)
  28. Mazda North American Operations — TSB 09-019/26, 2021 CX-5 fob failure (2026)
  29. Mazda North American Operations — SA-040/17, door request switch and fob not working (2017)
  30. Mazda North American Operations — TSB 09-041/15, driver's door connector C-15 (2015)
  31. Mazda North American Operations — TSB 05-004/16, ignition stays in accessory mode (2016)
  32. Mazda North American Operations — TSB 05-001/19, shifter lock-release button (2019)
  33. Mazda North American Operations — TSB 09-035/14, liftgate opener switch connector (2014)
  34. Mazda North American Operations — TSB 09-044/16, liftgate half-latch in cold weather (2016)
  35. Mazda North American Operations — TSB 09-015/22, liftgate lock striker corrosion (2022)
  36. Mazda North American Operations — SA-050/22, liftgate will not unlatch (2022)
  37. Mazda North American Operations — TSB 09-022/24b, fob liftgate button hold time (2024)
  38. NHTSA (U.S.) — Complaints for the 2013 Mazda CX-5 (queried 2026)
  39. NHTSA (U.S.) — Complaints for the 2014 Mazda CX-5 (queried 2026)
  40. NHTSA (U.S.) — Complaints for the 2015 Mazda CX-5 (queried 2026)
  41. NHTSA (U.S.) — Complaints for the 2020 Mazda CX-5 (queried 2026)
  42. NHTSA (U.S.) — Complaints for the 2021 Mazda CX-5 (queried 2026)
  43. NHTSA (U.S.) — Complaints for the 2024 Mazda CX-5 (queried 2026)
  44. Équité Association — Top 10 Most Stolen Vehicles of 2019, Canada (2019 list)
  45. Équité Association — Top 10 Most Stolen Vehicles of 2019, Ontario (2019 list)
  46. Équité Association — Top 10 Most Stolen Vehicles of 2020, Canada (2020 list)
  47. Équité Association — Top 10 Most Stolen Vehicles of 2020, Ontario (2020 list)
  48. Équité Association — Top 10 Stolen Vehicles, Canada ("2021" list)
  49. Équité Association — Top 10 Stolen Vehicles, Ontario ("2021" list)
  50. Équité Association — Top 10 Most Stolen Vehicles, Canada (2022 list)
  51. Équité Association — Top 10 Most Stolen Vehicles, Ontario (2022 list)
  52. Équité Association — Top 10 Most Stolen Vehicles by theft frequency, Ontario (2022 list)
  53. Équité Association — Top 10 Most Stolen Vehicles by number of thefts, Canada (2023 list)
  54. Équité Association — Top 10 Most Stolen Vehicles by number of thefts, Ontario (2023 list)
  55. Équité Association — Top 10 Most Stolen Vehicles by theft frequency, Ontario (2023 list)
  56. Équité Association — Top 10 Most Stolen Vehicles by number of thefts, Canada (2024 list)
  57. Équité Association — Top 10 Most Stolen Vehicles by number of thefts, Ontario (2024 list)
  58. Équité Association — Top 10 Most Stolen Vehicles by theft frequency, Canada (2024 list)
  59. Équité Association — Top 10 Most Stolen Vehicles by theft frequency, Ontario (2024 list)
  60. Wired — Radio Attack Lets Hackers Steal 24 Different Car Models (2016, third-party news)
  61. Mazda Canada — 2015 CX-5 Owner's Manual

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