--- title: "2018 Mazda CX-5 Parts and Specs" description: "Everything for the 2018 Mazda CX-5: oil type and capacity, battery group size, tire sizes, wiper blades, filters, service schedule, and common problems, verified, sourced, and in one place." url: "https://whichcarparts.com/cars/mazda/cx-5/2018" updated: "2026-08-21" --- # 2018 Mazda CX-5 parts and specs Everything you need to own and maintain this exact model year. Verified specifications, part numbers, and the problems that recur, in one place. KF (2nd generation), 2017-2025, Compact SUV. ## Quick facts | Quick fact | Value | | --- | --- | | Engine oil | 0W-20, 4.8 qt | | Battery | Group 35, 520 CCA | | Tire size | 225/65R17 (base trim) | | Wiper blades | 24" / 18" / 14" rear | | Cabin filter | Mazda KD45-61-J6X9U | | Key fob battery | CR2032 | ## Specifications for the 2017-2025 CX-5 ### Oil & filter Viscosity, capacity, filter part numbers, change interval [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/oil). ### Battery BCI group size, cold cranking amps, AGM or flooded [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/battery). ### Tires & wheels Factory sizes by trim, pressures, bolt pattern, lug torque [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/tires). ### Wiper blades Driver, passenger and rear blade lengths [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/wipers). ### Air & cabin filters Cabin and engine air filter part numbers, locations, intervals [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/filters). ### Bulbs Headlight, fog and marker bulb types [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/bulbs). ### Brakes Rotor diameters, pad references, service notes [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/brakes). ### Fluids Transmission fluid, coolant, brake fluid and capacities [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/fluids). ### Service schedule What's actually due at every mileage interval [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/service-schedule). ### Problems & reliability Documented failures, recalls, and which years to avoid [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/common-problems). ### Oil light reset Step-by-step maintenance light reset, no tools [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/oil-reset). ### Key fob battery Which coin cell the remote takes [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/key-fob-battery). ### Specs Towing, weight, fuel tank, fuel economy [Read more](https://whichcarparts.com/cars/mazda/cx-5/2017-2025/specs). These specifications are shared across every CX-5 of the KF (2nd generation) generation. See the [2017-2025 Mazda CX-5 overview](https://whichcarparts.com/cars/mazda/cx-5/2017-2025) for the full picture, or the [Mazda CX-5 guide](https://whichcarparts.com/cars/mazda/cx-5) to compare every generation. ## What changed for the 2018 Mazda CX-5 | Years | What changed | | --- | --- | | 2018 | Cylinder deactivation added to the 2.5L; g-Vectoring Control standard | ## Known problems with the 2018 Mazda CX-5 7 of the 8 issues we track for the 2017-2025 generation are documented against the 2018 model year. ### Side curtain air bags may not deploy properly (recall) (major) On certain 2018 CX-5s, the side curtain air bags may not fully unfold during deployment in a side-impact or rollover crash, failing FMVSS 226 ejection-mitigation requirements. Mazda recalled the affected vehicles and dealers replace the curtain air bags free of charge. NHTSA 18V-426 (Mazda campaign 2718F). Typical cost: Free under recall. ### PCM software error can cause engine stall (recall) (major) A software error in the powertrain control module on certain 2018-2019 CX-5s (shared with Mazda6 and Mazda3) can cause the engine to stall unexpectedly while driving. Mazda dealers reprogram the PCM free of charge. NHTSA 19V-497 (Mazda campaign 3719F). Typical cost: Free under recall. ### Low-pressure fuel pump impeller failure (recall) (major) The impeller inside the in-tank low-pressure fuel pump can crack and deform on certain 2018-2019 CX-5s (part of a wider Mazda recall covering Mazda3, Mazda6, CX-3, CX-9, MX-5 and Mazda2), potentially causing the fuel pump to fail and the engine to stall. Dealers replace the fuel pump free of charge. NHTSA 21V-875 (Mazda campaign 5321K). Typical cost: Free under recall. ### Rocker arm failure in cylinder-deactivation cylinders (major) Mazda issued Service Alert SA-041/18 (superseded by SA-022-19) instructing dealers to remove the valve cover and inspect for a fallen or broken rocker arm, specifically in the cylinder-deactivation cylinders (1 and 4), on early 2.5L engines with cylinder deactivation. A broken rocker arm can cause a loud tick/knock, rough running, or in the worst case valvetrain damage. A revised cylinder head assembly was introduced for service replacements. Mazda Service Alert SA-041/18 / SA-022-19 (NHTSA TSB doc MC-10159203-0001). Typical cost: Free under warranty when caught early; $1,500-$3,000+ for cylinder head work out of warranty. ### Cylinder deactivation vibration/shudder (minor) Many 2.5L owners (non-turbo, with cylinder deactivation) report a noticeable vibration or shudder in the 30-45 mph range or under light throttle, felt when the engine transitions in and out of 2-cylinder mode. Owner and forum reports tie some cases to automatic transmission fluid contaminated with iron powder from torque-converter lock-up wear; Mazda has issued various software recalibrations over the years, but there is no single universal fix and the behavior is not considered a safety defect. Disabling cylinder deactivation is not officially supported. Typical cost: $0 (ECM recalibration under warranty) to several hundred dollars for a transmission fluid/filter service if ATF contamination is suspected. ### Water pump weep / slow coolant loss (moderate) The engine-driven water pump on the 2.5L can develop a slow seal leak that shows up as gradually dropping coolant level with no visible puddle, often only found as dried pink/green crust near the pump weep hole or a coolant smell. It's a wear item rather than a manufacturing defect, and most owners catch it well before it causes overheating. Typical cost: $300-$650 parts and labor. ### Mazda Connect infotainment freezes and reboots (class-action settlement) (minor) 2016-2020 CX-5s are part of a certified settlement class (Duffy et al. v. Mazda Motor of America) covering Mazda Connect infotainment units that reboot, freeze, get stuck in a boot loop, or lose audio/backup-camera function. The settlement provides reimbursement for prior CMU/head-unit repairs and an extended warranty window for affected vehicles. Typical cost: Free repair/reimbursement under the settlement; $600-$1,000+ for a CMU replacement out of pocket. 1 more issue is reported in other 2017-2025 years: Exhaust valve stem seal oil consumption (2021 (isolated reports in adjacent years)). Full detail, costs and sources on the [Mazda CX-5 problems and years to avoid](https://whichcarparts.com/cars/mazda/cx-5/common-problems) guide. ## Which engines were offered in the 2018 CX-5? | Engine | Trims | Oil | Oil capacity | | --- | --- | --- | --- | | 2.5L SkyActiv-G (PY-VPS) | Sport, Touring, Grand Touring, Carbon Edition, 2.5 S/S Select/S Preferred (2024+ naming) | 0W-20 | 4.8 qt | ## About the Mazda CX-5 The Mazda CX-5 is Mazda's best-selling model in the US and the compact SUV enthusiast reviewers point to when they say a crossover can actually be fun to drive. 5L four-cylinder, a conventional 6-speed automatic, and no turbo or CVT anywhere in the lineup, simple, low-maintenance mechanicals whose main documented weak spots are a corrosion-prone liftgate strut recall and a steering-knuckle bolt recall. 2L SkyActiv-D diesel for 2019-2020 that Mazda quietly dropped after low demand. 5L engines, a widely reported cylinder-deactivation shudder/vibration that Mazda never fully resolved with a clean fix, exhaust valve-stem-seal oil consumption on some 2021 engines, and a class-action settlement covering Mazda Connect infotainment freezes/reboots on 2016-2020 CX-5s. All CX-5s from 2013 on use FL-22 long-life coolant, Mazda ATF-FZ automatic transmission fluid, a Group 35 battery, and a CR2032 key fob battery. Parts that are cheap and easy to find regardless of which generation you own. For how the specifications changed across every generation, see the [full Mazda CX-5 guide](https://whichcarparts.com/cars/mazda/cx-5). ## Other Mazda CX-5 years - [2025](https://whichcarparts.com/cars/mazda/cx-5/2025) - [2024](https://whichcarparts.com/cars/mazda/cx-5/2024) - [2023](https://whichcarparts.com/cars/mazda/cx-5/2023) - [2022](https://whichcarparts.com/cars/mazda/cx-5/2022) - [2021](https://whichcarparts.com/cars/mazda/cx-5/2021) - [2020](https://whichcarparts.com/cars/mazda/cx-5/2020) - [2019](https://whichcarparts.com/cars/mazda/cx-5/2019) - [2017](https://whichcarparts.com/cars/mazda/cx-5/2017) - [2016](https://whichcarparts.com/cars/mazda/cx-5/2016) - [2015](https://whichcarparts.com/cars/mazda/cx-5/2015) - [2014](https://whichcarparts.com/cars/mazda/cx-5/2014) - [2013](https://whichcarparts.com/cars/mazda/cx-5/2013) Data confidence for this generation: Verified. ## Sources - [Mazda USA official 2019 CX-5 owner's manual, engine/electrical specifications (battery Ah, spark plug part numbers)](https://www.mazdausa.com/static/manuals/2019/cx5/contents/10020101.html) - [Mazda USA official 2019 CX-5 owner's manual, coolant/lubricant classifications](https://www.mazdausa.com/static/manuals/2019/cx5/contents/10020100.html) - [Mazda USA official 2025 CX-5 owner's manual, scheduled maintenance intervals](https://www.mazdausa.com/static/manuals/2025/cx-5/contents/07020201.html) - [NHTSA recall 18V-426, side curtain air bags](https://api.nhtsa.gov/recalls/recallsByVehicle?make=mazda&model=cx-5&modelYear=2018) - [NHTSA recall 19V-497, PCM software stall](https://api.nhtsa.gov/recalls/recallsByVehicle?make=mazda&model=cx-5&modelYear=2018) - [NHTSA recall 21V-875, low-pressure fuel pump](https://api.nhtsa.gov/recalls/recallsByVehicle?make=mazda&model=cx-5&modelYear=2019) - [NHTSA TSB library, Service Alert SA-041/18 rocker arm inspection (cylinder deactivation)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10159203-0001.pdf) - [Mazda Connect Infotainment Settlement, official settlement site (class definition: CX-5 2016-2020)](https://www.mazdainfotainmentsettlement.com/) - [ClassAction.org, 2021 Mazda valve stem seal oil consumption proposed class action](https://www.classaction.org/news/five-2021-mazda-vehicle-models-burn-excessive-oil-due-to-defect-class-action-says) - [CarCostCanada, 2019 CX-5 Signature Diesel road test (168 hp / 290 lb-ft)](https://carcostcanada.com/blog/2019-mazda-cx-5-signature-diesel-road-test/) - [Wikipedia, Mazda CX-5 second generation engine history](https://en.wikipedia.org/wiki/Mazda_CX-5) - [Mazda parts forum, PY8W-14-302 turbo oil filter and 5.1 qt fill confirmation](https://mazdas247.com/forum/threads/oil-filter-2-5l-turbo.123872068/) Specifications vary with engine option, production date, and market.