2026 Acura ADX: St. Louis Service & Repair Guide

Quick Answer: Servicing the 2026 Acura ADX in St. Louis

The ADX uses Acura’s Maintenance Minder system rather than a fixed mileage chart — the dash tells you when service is actually due based on how the vehicle has been driven, not a printed interval schedule. It takes premium gasoline on every trim. New-vehicle purchases from Missouri dealers are exempt from the state’s biennial safety inspection for the first ten model years or 150,000 miles, whichever comes first; St. Louis County additionally requires an emissions check on renewal for most gasoline vehicles once that exemption window closes. Acura backs every new ADX with a 4-year/50,000-mile basic warranty and a 6-year/70,000-mile powertrain warranty. Frank Leta Acura runs its own on-site Acura service center and parts department at 11777 Tesson Ferry Road in St. Louis, open Monday through Saturday.

Close-up of the 2026 Acura ADX flat-bottom steering wheel and paddle shifters
The ADX’s flat-bottom steering wheel with paddle shifters. Photo: Acura.

How the Maintenance Minder actually works

Acura, like its parent Honda, doesn’t print a fixed “change oil every X miles” chart in the ADX owner’s manual. Instead, an onboard system tracks engine load, driving conditions, and time since the last service, then displays a percentage on the dash counting down to zero. When it gets low, that’s the signal to schedule service — not a calendar reminder, an actual read of how the specific vehicle has been driven. A daily short-trip commuter around South County and a highway-heavy driver on I-270 will see different intervals from the same car, which is the point of the system: it’s tuned to real use, not a generic worst-case number.

Every ADX trim recommends premium gasoline, a detail that’s easy to miss on a vehicle this size and price. The turbocharged 1.5-liter engine is tuned around premium fuel to hit its rated 190 horsepower and its EPA fuel-economy figures; running regular isn’t going to strand anyone, but it’s not what the engine is calibrated for, and it’s worth budgeting for at the pump.

Missouri inspection rules for a brand-new ADX

Missouri’s periodic vehicle safety inspection program exempts new vehicles from their first titling for the first ten model years or 150,000 miles, whichever comes first — so a 2026 ADX bought new isn’t due for its first safety inspection for a long while. St. Louis County (along with St. Louis City, St. Charles County, and Jefferson County) layers on an emissions inspection requirement for most gasoline vehicles once that exemption period is no longer in play, tied to registration renewal rather than to the sale itself. The practical upshot for a new ADX buyer: nothing to schedule at purchase, and the first real inspection conversation is years out. Confirm current requirements against Missouri Department of Revenue guidance at renewal time, since inspection rules are set at the state and county level and can be updated independent of anything Acura or Frank Leta Acura controls.

What’s actually covered under warranty

Acura’s factory coverage on a new 2026 ADX runs 4 years or 50,000 miles bumper-to-bumper, and 6 years or 70,000 miles on the powertrain specifically — engine, transmission, and the AWD system on models equipped with it — whichever limit is reached first. On top of that, Frank Leta Acura’s Lifetime Warranty program covers parts and labor on new-vehicle repairs for as long as you own the car, with exclusions written in for diesel and electric models (not a relevant exclusion on a gas-turbo ADX, but worth knowing the program exists for other vehicles in the family). Ask the sales or service team for the specific terms as they apply to a given ADX purchase.

What the service department is actually like, according to recent customers

Frank Leta Acura’s service department carries its own 4.74-star average across roughly 300 Google reviews, and the detailed ones describe a team that stays engaged even when something goes sideways. “I purchased a used vehicle at Frank Leta Acura recently and at first things were a little messy. However, these issues were quickly addressed by [a] slew of team members at this location… I especially have to thank assistant service manager Racheal Fowler and service advisor Marc Diaz for working with me to make things right and Sales Manager David Bradshaw for the quick responses and attention to detail,” wrote Sam Athanas. Another buyer highlighted a specific advisor by name: “The customer service was excellent and the employees in the service center are amazing, shout out to Blake Bartok the service advisor as well as the general sales manager Justin Smikoski. They didn’t give me the run around or just tell me what I wanted to hear… they genuinely care about customers and about getting the job done right!” (Shannon Gorges).

A longer-tenured customer, Grace Delahunty, described a routine visit: “Setting up a service appointment was very easy. Kevin, my service advisor was very nice and kept me updated on [my] vehicle when in the shop. The wait time was not bad, they did an oil change, tire rotation, multi point inspection as well as a car wash… all in all it took less than an hour.” And on a harder case — a transmission issue on a car that wasn’t even purchased at Frank Leta Acura — Michael Oliver wrote: “Kevin (the service advisor) became my advocate and Cougar (assistant service manager) became my solution finder… they stayed late to get me a loaner that day, as they knew it was going to be a while waiting on parts.” Both Kevin Goedeke and Cougar Knickerbocker remain on Frank Leta Acura’s current service team.

Frequently asked questions

Is the Acura ADX engine reliable?

The ADX’s turbocharged engine is new to Acura’s lineup for the 2025-2026 model years, so it doesn’t yet have the long-term reliability track record of Honda/Acura’s more established engines. What it does have is the brand’s standard 4-year/50,000-mile bumper-to-bumper and 6-year/70,000-mile powertrain warranty, plus Frank Leta Acura’s own Lifetime Warranty program on new-vehicle purchases — meaningful coverage during the years reliability data is still being established across the fleet.

Does a new ADX need a safety inspection before I can register it?

No. Missouri exempts new vehicles from the state’s periodic safety inspection for the first ten model years or 150,000 miles, whichever comes first, so a new 2026 ADX purchase doesn’t trigger an inspection requirement at the time of sale.

Does the ADX require premium gas, or is that just a recommendation?

Acura specifies premium gasoline on every ADX trim. The engine is tuned to its rated 190 horsepower and EPA fuel-economy figures on premium fuel; treat it as the fuel to actually run, not an optional upgrade.

How do I schedule service at Frank Leta Acura?

The Frank Leta Acura service department can be reached directly to schedule; the dealership’s service center, parts department, and on-site car wash are all located at 11777 Tesson Ferry Road in St. Louis, open Monday through Saturday.

A service department that’s been doing this since 1986

An engine this new to Acura’s lineup is exactly the kind of vehicle where an experienced, in-house service team matters. Frank Leta Acura’s own service center handles ADX maintenance and repair on-site, backed by a team several current customers name specifically in their reviews. See the pricing & leasing guide for what a new ADX actually costs to buy and own in St. Louis County.

All 2026 Acura ADX guides

Maintenance and warranty information reflects Acura’s standard published coverage; confirm exact terms and any owner-specific details with Frank Leta Acura at time of purchase or service. Missouri inspection and emissions rules are set by the Missouri Department of Revenue and are subject to change; confirm current requirements before relying on them. Customer quotes are excerpts from public Google reviews of Frank Leta Acura, lightly bracketed only where needed for clarity, otherwise verbatim.