HelloAuto Toyota Prius Replacement Key Fob 2004-2009 – Silver Logo, 312MHz with Immobilizer Chip

Replacement HelloAuto key fob engineered to match Toyota Prius models 2004–2009 with the silver Toyota logo, offering full original functions including immobilizer chip and 312MHz operation.

If your Prius key is lost, cracked, or the buttons no longer work, this HelloAuto keyless entry remote is built to be a direct hardware match for the original smart key (P/N 2584A-B31EG, 89994-47061; FCC ID: MOZB31EG). It arrives as a complete key assembly — shell, internal electronics, battery and transponder chip — so you won’t have to transfer parts from your old fob. Note that this unit is compatible only with Prius fobs that have the silver Toyota emblem and operates at 312MHz.

Will this HelloAuto fob work with my specific Prius year and model?

This key fob is designed for Toyota Prius model years 2004 through 2009 and matches the factory part numbers listed above. Before buying, confirm your existing remote shows the silver Toyota logo and matches either P/N 2584A-B31EG or 89994-47061. If your current key has a different logo color or a different part number, this replacement may not be compatible.

• Compatible years: 2004, 2005, 2006, 2007, 2008, 2009 Prius
• Part numbers supported: 2584A-B31EG, 89994-47061
• FCC ID: MOZB31EG and frequency: 312MHz
• Only for versions with the silver Toyota logo — verify visually

How do I get this HelloAuto fob programmed to my car?

This remote cannot be self-programmed at home; programming requires specialized equipment. A qualified locksmith or your Toyota dealership can program the transponder and remote functions quickly and usually at a modest cost. Bringing both the vehicle and the new key to the pro ensures the immobilizer chip is correctly matched and the remote buttons are synced.

• Self-programming: not supported
• Recommended: certified locksmith or Toyota dealer for programming
• Bring vehicle and new fob to service for pairing and testing
• Programming time: typically short; costs vary by service provider

What exactly comes inside the HelloAuto replacement key fob?

The product ships as a complete key: outer shell, internal electronics, functional transponder chip, and battery already installed or included depending on the batch. Each unit is inspected to ensure button response and signal strength match factory expectations. That makes this fob a ready-to-program swap without needing parts from your old remote.

• Complete assembly: shell, buttons, circuit board, transponder chip
• Includes battery or fitted battery for immediate use
• Tested for signal strength and button functionality
• Intended as a true replacement — no parts transfer required

What quality assurance and support does HelloAuto provide?

HelloAuto inspects each key fob to confirm it performs like the original and offers proactive customer support after purchase. If you run into fitment questions or need help confirming compatibility, HelloAuto provides direct assistance and a 6+1 months support window. Keep your order details handy when contacting support for the fastest help.

• Quality checks for electronics and button operation
• Customer support available for compatibility and troubleshooting
• 6+1 months of support coverage from HelloAuto
• Contact support with part numbers and vehicle year for quick answers

Who is this for: drivers of Toyota Prius model years 2004–2009 who need a one-to-one hardware replacement with original-style functionality, including the immobilizer chip and 312MHz remote signal, and who can arrange programming with a locksmith or dealer. Choose this HelloAuto fob if you want a ready-to-program spare or full replacement that mirrors the original silver-logo Prius key.