Effective July 1, 2025, test fees for most tests will be changing.

In Maricopa County (Area A):
HD Diesels will be changing from $25.00 to $23.75
OBD and IM147s will be changing from $17.00 to $16.15
Loaded Idle, Idle, and Light duty diesels will be changing from $16.00 to $15.20

In Pima County (Area B)
HD Diesels will be changing from $12.25 to $20.45
OBDs will be changing from $12.25 to $16.15
Loaded Idle, Idle, and Light duty diesels will remain unchanged at $12.25.

Please manage your coupon purchases as the month ends. All unused coupons in the above denominations can be exchanged by calling 602.437.8041 or emailing ap@gordon-darby.com and ask for Ryan. He will give you instructions on how to exchange them.

You can purchase the new denominations beginning 06.01.2025

PLEASE NOTE: $25.00, $17.00, and $16.00 coupons will not be accepted after 7.01.2025.

$12.25 coupons will only be accepted for Loaded Idle, Idle, and Light duty diesels after 7.01.2025

By the close of business June 30, 2025, all $25.00, $17.00, and $16.00 coupon vouchers that have not been redeemed will be credited to your account as a credit balance. Credit balances will be applied to future purchases, or you may request a refund. Please note all coupons that are not redeemed will no longer be valid.