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MYSTIC.AUTO KEY (617) 961-9211

Service

Lost car key replacement — spare still at home

You lost a key. You still have one. This is the cheaper version of the problem.

Call (617) 961-9211

$135–250 for most spares

You are somewhere with a working key at home, or a household member can bring it. That working key is what keeps this job on the lower end of the range — the new key can be cloned from it rather than originated from the vehicle.

We come to the car. Push-to-start fobs are made and programmed on the spot, usually in about twenty minutes. Bladed keys (transponder, remote-head, sidewinder, basic metal) are cut to your vehicle’s specification and fitted within a few days.

What changes the price

The key type is the single biggest factor. A cloned transponder is the least expensive. A remote-head key adds the cost of pairing the lock buttons. A smart proximity fob requires a programming session with the vehicle even when a working fob exists.

Time of day and the make and year move the quote when the programming path is encrypted. None of this is a surprise — it is discussed before I head out, and the price quoted on the phone is the price you pay.

Why a spare made now is cheaper than a key made later

Cloning a key you already have skips the most expensive step: originating a key from the vehicle’s code. If you wait until the last key is gone, you pay the all-keys-lost rate every time. A second key today is the cheapest car key you will ever buy.

If you have already lost one and only have one left, the cheapest thing you can do is get a spare made before that one disappears too.

Proof of ownership

Before any key is cut or programmed, the registration or title in your name and a matching photo ID are checked. This is the reason a key made through this business cannot be used to steal a car. It is stated as a feature rather than a hurdle — it keeps every vehicle safe, and it deters the kind of request that no honest locksmith should take.

Questions

Do you need the working key to make the replacement?
Yes, for a cloned spare. If the working key cannot reach the vehicle, bring it along or have someone meet us. Without any working key, this becomes an all-keys-lost job at the higher rate.
Can you make the key where the car is parked?
Yes. I carry the cutting machine, blanks, and programming equipment. As long as the vehicle is in the service area and ownership is verified, the key is made on site.
How long does it take?
Push-to-start fobs are usually done in about twenty minutes on the spot. Bladed keys are cut to your vehicle’s specification and fitted within a few days, so they are booked ahead.

Or match your key by sight

Already know your key? Match it here.

Choose your key type

Select a key above to see the price range and what to do next.

Basic metal blade

Honest price range

Spare $45–75

All keys lost $60–95

Spare: Order ahead · 2–3 days All keys lost:

A plain cut key with no electronics. Common on older domestic trucks and a few basic models. No transponder, no buttons.

Bladed keys are cut to your vehicle’s specification, so this is booked ahead rather than done on the spot. Order today, programmed and in your hand in 2–3 days.

Transponder key

Honest price range

Spare $135–185

All keys lost $225–325

Spare: Order ahead · 2–3 days All keys lost: Not currently offered

A plastic-headed key with a transponder chip inside. Looks like an ordinary key but the vehicle will not start without the chip. Most cars since about 1998.

Bladed keys are cut to your vehicle’s specification, so this is booked ahead rather than done on the spot. Order today, programmed and in your hand in 2–3 days.
All keys lost for this key type is not currently offered. The dealer is the path when every bladed key is gone — get a spare while a working key still exists.

Remote head key

Honest price range

Spare $175–250

All keys lost $275–375

Spare: Order ahead · 2–3 days All keys lost: Not currently offered

A key blade plus lock and unlock buttons built into one plastic body. The most common key shape on the road today.

Bladed keys are cut to your vehicle’s specification, so this is booked ahead rather than done on the spot. Order today, programmed and in your hand in 2–3 days.
All keys lost for this key type is not currently offered. The dealer is the path when every bladed key is gone — get a spare while a working key still exists.

Smart proximity fob

Honest price range

Spare $250–375

All keys lost $375–550

Spare: Available now All keys lost: Available now

A fob with no blade. You keep it in your pocket and push a button to start. Push-to-start proximity keys are standard on most cars built after about 2014.

All keys lost: Yes, the largest jump. There is no blade to copy — the fob is paired to the vehicle through an encrypted programming session, and a PIN is often extracted first.

Laser-cut / sidewinder blade

Honest price range

Spare $175–250

All keys lost $300–450

Spare: Order ahead · 2–3 days All keys lost: Not currently offered

A thick blade with the cut milled into the side rather than the edge — the signature cut on many modern Honda, Lexus, and higher-trim keys. Often paired with a transponder or smart system.

Bladed keys are cut to your vehicle’s specification, so this is booked ahead rather than done on the spot. Order today, programmed and in your hand in 2–3 days.
All keys lost for this key type is not currently offered. The dealer is the path when every bladed key is gone — get a spare while a working key still exists.

Next step

Call now

Calls answered directly. Same-day service in most cases.

The price quoted on the phone is the price you pay. No bait-and-switch.