2023 Toyota Highlander Key Fob Guide (US): Types, Batteries, Programming & Costs

The 2023 Toyota Highlander (US market) typically uses a proximity “Smart Key” fob that enables keyless entry and push-button start on most trims. Some vehicles may have an additional remote or a valet/emergency key blade that works with the door lock and a backup starting procedure. Replacement and programming are usually security-controlled, so consumers generally find that verifying compatibility (FCC ID, board number, and frequency) before purchase is essential. Battery replacement is usually simple, but lost-all-keys situations can be significantly more expensive due to immobilizer registration requirements.

2 Key Types
$250-$650 Dealer Range
$30-$200 Aftermarket Range

Compatible Key Fob Types

The following key types are typically compatible with the 2023 Toyota Highlander. Compatibility varies by trim and options.

Toyota Smart Key (Proximity fob) with Push-Button Start

A proximity (passive entry) Smart Key fob that communicates with the vehicle for keyless unlock/lock and enables push-button start. It also typically contains an emergency mechanical key blade inside for the driver door, and it can start the vehicle using a backup procedure if the fob battery is weak.

Features

  • Proximity keyless entry (touch/handle unlock when fob is nearby)
  • Push-button start (immobilizer-authorized starting)
  • Remote lock/unlock and panic; remote liftgate on many trims

Buttons

lockunlockpanicremote liftgate

Battery

CR2032

3-5 years typical lifespan

Dealer OEM $250-$550 Programming included
Aftermarket $60-$200 Programming separate

Programming

🏢 Dealer Required

Programming typically requires immobilizer/Smart Key registration using professional diagnostic equipment and security authorization. If at least one working Smart Key is available, adding another is often simpler than an all-keys-lost situation. For used fobs, consumers generally find you must confirm the fob can be reset/virginized (many cannot be reused) and that the FCC ID/board number/frequency match the vehicle.

⚠️ Common Issues

  • Weak or dead CR2032 battery causing reduced range or “Key not detected” messages
  • Used/previously-registered fobs that cannot be programmed to another vehicle
  • Wrong FCC ID/board number leading to partial function (e.g., remote works but proximity/start does not)

Emergency mechanical key blade (insert key inside fob)

A cut metal key blade stored inside the Smart Key fob. It typically operates the driver door lock if the fob battery is dead and may be required for certain lockout situations. It does not replace the Smart Key’s immobilizer functions for push-button start.

Features

  • Manual door unlock/lock at the driver door cylinder (where equipped)
  • Useful during fob battery failure
  • Can be duplicated by code or from an existing blade

Buttons

none

Battery

CR2032

10+ years typical lifespan

Dealer OEM $30-$90 Programming included
Aftermarket $10-$40 Programming separate

Programming

🏢 Dealer Required

The blade must be cut to match the vehicle. Cutting may require proof of ownership if cutting by code. This key typically will not start a push-button-start Highlander by itself because the immobilizer authorization is in the Smart Key fob.

⚠️ Common Issues

  • Uncut/incorrectly cut blade will not turn the door lock
  • Worn or poorly cut duplicates can bind or fail in the cylinder
  • Consumers overlook the blade until a dead fob battery occurs

Cost Comparison: Your Options

🏢

Dealership

$250-$650
  • ✓ OEM quality guaranteed
  • ✓ Programming included
  • ✓ Warranty coverage
  • ✗ Higher cost
  • ✗ May require appointment

Best for: Warranty coverage, guaranteed compatibility

🔧

Locksmith

$150-$450
  • ✓ Often same-day service
  • ✓ Mobile options available
  • ✓ Programming included
  • ✓ Often OEM parts
  • △ Verify credentials

Best for: Speed, convenience, moderate savings

📦

Aftermarket Online

$30-$200
  • ✓ Lowest cost option
  • ✓ Wide selection
  • ✗ Programming not included
  • ✗ Compatibility varies
  • △ Check return policy

Best for: DIY-capable owners, budget-conscious

Totals vary based on whether you still have a working key, whether the fob is OEM vs aftermarket, and whether it’s an all-keys-lost situation (which typically increases security/immobilizer labor). Dealer pricing often bundles OEM fob + programming; locksmith pricing varies by tool coverage and availability. Aftermarket pricing usually reflects the fob only and may still require professional programming.

🛒 Buyer's Checklist

Before purchasing a replacement key fob for your 2023 Toyota Highlander, verify these points:

1 Match the replacement fob to your exact trim and starting system (Smart Key/proximity with push-button start) before buying.
2 Verify identifiers on the original fob when possible (FCC ID/IC, board number, and button layout); avoid listings that won’t provide these details.
3 Confirm the fob is new/virgin (or explicitly guaranteed reusable for your vehicle) to reduce the risk of a non-programmable used fob.
4 Budget separately for programming and emergency key cutting; the cheapest fob listing may not include either.
5 Use sellers with clear return policies for “not compatible/not programmable” outcomes and keep packaging until the fob is successfully added.

⚠️ Common Mistakes to Avoid

✗

Buying a used Smart Key that is already locked to another vehicle and cannot be re-registered.

✗

Assuming any Toyota Highlander fob will work across years/trims without matching FCC ID/board number/frequency.

✗

Replacing the battery but installing it upside down or bending the battery contacts, causing intermittent operation.

Related Model Years

Key fob compatibility often spans multiple model years. These years typically share similar key systems:

2020 2021 2022 2023

Frequently Asked Questions

What battery does a 2023 Toyota Highlander key fob use?

Most 2023 Highlander Smart Key fobs typically use a CR2032 coin-cell battery. If your fob behaves differently after replacement, re-check battery orientation and that the case fully snaps shut without pinching contacts.

Can I program a 2023 Highlander Smart Key fob myself?

For most US-market 2023 Highlanders, Smart Key (proximity/push-start) programming is typically security-controlled and requires professional diagnostic equipment and authorization. Some owners can do basic remote-related steps on older Toyota systems, but Smart Key/immobilizer registration on this generation is generally not a DIY procedure.

Will a used key fob work if I buy it online?

Sometimes, but consumers generally find it’s risky: many Smart Key fobs become permanently registered to the first vehicle and cannot be programmed to another. If you consider used, look for a seller that explicitly guarantees it can be reset/re-registered for your exact vehicle and offers returns if it cannot be programmed.

Need Help With a Specific Situation?

🚨 Lost All Keys What to do when you've lost your only key ➕ Get a Spare Add a backup key before emergencies 🔋 Dead Battery Replace your key fob battery ⚖️ Compare Options Full comparison of all options

Related Toyota Models

2023 Toyota Highlander Hybrid 2023 Toyota RAV4 2023 Toyota Sienna

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Last updated: 2026-01-04