2018 Toyota Highlander Key Fob Programming Guide
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick reference
| Item | Detail |
|---|---|
| FCC ID | HYQ14FBA |
| OEM Fob PNs | 89904-0E120, 89904-0E121 |
| Aftermarket Options | Various, check Amazon or locksmith suppliers |
| Battery Type | CR2025 |
| Programmable On-Board? | No |
| Cuts Required? | Yes, emergency key blade |
Step-by-step on-board programming
Unfortunately, the 2018 Toyota Highlander does not have an on-board (DIY) programming procedure for new key fobs. Programming a new key requires specialized diagnostic equipment (a scan tool) that communicates with the vehicle's immobilizer system. This is a security measure to prevent unauthorized key copying.
To program a new key fob, you will need to contact a dealership or an automotive locksmith. They have the necessary tools and software to perform the programming.
Battery replacement
Replacing the battery in your 2018 Toyota Highlander key fob is a simple process you can do at home.
- Open the fob: There's a small button or latch on the side of the fob. Press it to release the emergency key blade.
- Separate the casing: Once the key is removed, you can use a small flathead screwdriver or the key itself to gently pry open the two halves of the fob casing. There is usually a small slot for this purpose.
- Remove the old battery: The battery is a CR2025 coin cell. Note the orientation of the positive (+) and negative (-) sides.
- Insert the new battery: Place the new CR2025 battery in the same orientation as the old one.
- Reassemble the fob: Snap the two halves of the casing back together and re-insert the emergency key blade.
Where to buy a replacement fob
- Dealer: The most expensive option, but you are guaranteed to get a genuine OEM fob that is compatible with your vehicle. Expect to pay in the range of $200-$400 for the fob and programming.
- Automotive Locksmith: A more affordable option than the dealer. Locksmiths can often source OEM or high-quality aftermarket fobs and have the tools to program them. Costs can range from $150-$300, including the fob and programming.
- Amazon/Online Retailers: You can find a wide variety of aftermarket fobs at very low prices, sometimes under $50. However, the quality can be inconsistent, and you still need to find a locksmith or dealer to program the fob for you. Be aware that some locksmiths may not be willing to program a fob that you provide.
If on-board programming isn't supported
As mentioned, the 2018 Toyota Highlander requires professional programming. The key fob contains a transponder chip that is part of the vehicle's immobilizer system. This chip needs to be registered with the car's computer for the key to be recognized and for the engine to start. The cost for this service typically includes the price of the key fob itself plus a labor charge for the programming, which usually takes about 30-60 minutes.
Find a mobile locksmith or shop on Repairius.
More specs for the 2018 Toyota Highlander
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Same spec — other model years
Maintenance & repair guides
2018 Toyota Highlander Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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