Mazda Key Replacement in Milwaukee

Mazda keys for Mazda3, CX-5, CX-9, and more

Mazda key replacement in Milwaukee covers the Mazda3 and Mazda6, the CX-5, CX-30, CX-50, CX-9, and CX-90, the older CX-7, and the MX-5 Miata. Some earlier Mazdas share their key system with Ford, such as the Tribute, a twin of the Ford Escape. We make the key at the car, and the year tells us most of what we need to know before we arrive.

Two working keys, or a programming tool

Many Mazdas from the 2000s and early 2010s can learn an extra key on board only when two working keys are already there. The rule is part of the security system, and it surprises a lot of owners who are down to one key and find that the new key cuts fine but will not start the car. With one key or none, the new key is programmed with a tool through the diagnostic port, and that is how we program every Mazda key. A single key left on the ring is not a dead end; it only means the tool does the learning.

The start knob on CX-7, CX-9, and Miata

Some Mazdas with the advanced keyless system have a start knob where other cars have a key: the 2007–2012 CX-7, the CX-9 through 2015, the 2006–2015 MX-5 Miata, and the RX-8. With the fob in your pocket, you push the knob in and turn it. Inside the fob sits a small auxiliary key. When the fob battery dies, the knob cover comes off, and the auxiliary key goes into the cylinder under it and starts the car.

On a 2009–2013 Mazda3 or Mazda6 with a start button, the auxiliary key goes into a small slot near the steering column instead. In both cases the auxiliary key is the backup for the doors and the start, so if it has gone missing from the fob, we cut and program a new one. The knob itself can also come loose from the switch with wear; that is a parts repair at the switch, not a new key.

Flip keys and smart keys

Many Mazdas from the late 2000s and the 2010s use a flip key, with the blade folding into the remote, including the CX-7, the CX-9, and many Mazda3, Mazda5, and Mazda6 models. The CX-5 from 2013 came with a chip key and a separate remote, or with a smart key, depending on the trim. The Mazda3 from 2019 and most newer CX models use smart keys, with the auxiliary key hidden inside. A flip key starts at $129, and a smart key at $159 (smart keys).

A spare Mazda key

With one working key, a spare starts at $69 (spare car key). We cut the blade, program the chip with the tool, and test both the start and the remote buttons. Count on 15 to 60 minutes at the car. Mazdas leave the factory with two keys, and a third one kept at home means you are not left with a single key and the two-key rule.

When every Mazda key is lost

No key left means we open the car first (car lockout). The blade is cut from a decoded lock or from the Mazda key code for the VIN, after the title or registration check. Then the tool programs the new keys and clears the lost ones from the car where the system allows it. All keys lost for a chip key starts at $119, and smart keys cost more (lost car keys).

Mazda remotes and Ford-built models

A separate Mazda remote, on older cars without buttons in the key, is programmed from $119 (key fobs). The Tribute SUV and the B-Series pickup were built alongside the Ford Escape and the Ford Ranger, so their keys follow Ford rules, which the Ford keys page explains.

For other makes, see car keys by make. For other Japanese makes, see Toyota keys and Subaru keys.