The 2019 CX-3 is Mazda's subcompact crossover built on the Mazda2 platform with a naturally-aspirated 2.0L Skyactiv-G engine and a 6-speed automatic. Generally reliable, but suffers from a few specific weak points tied to the transmission cooling system and occasional fuel delivery gremlins.
Transmission Oil Cooler Failure
Common · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Transmission fluid mixing with coolant (strawberry milkshake in overflow tank), Transmission slipping or delayed engagement after cold starts, Check engine light with transmission temp codes, Overheating during highway driving or towing light loads
Fix: Replace transmission oil cooler, flush both cooling system and transmission completely, sometimes requires new radiator if cross-contamination is severe. 4-6 hours labor depending on how contaminated systems are. Critical to catch early before torque converter damage occurs.
Estimated cost: $800-1,800
Fuel Pump Failure (Covered by Recall)
Occasional · high severity
Symptoms: Engine stalling at idle or during deceleration, Hard starting or extended cranking, especially when hot, Loss of power under acceleration, Vehicle dies while driving with no warning
Fix: Impeller in low-pressure fuel pump can crack and fail. This was subject to NHTSA recall; verify VIN eligibility for free dealer replacement. If out of recall window, fuel pump assembly replacement is 2.5-3.5 hours including tank drop.
Estimated cost: $0 (recall) or $600-1,100
Transmission Mount Deterioration
Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk or thud when shifting from park to drive, Vibration at idle that disappears when in neutral, Excessive engine movement visible during hard acceleration, Metallic knocking over bumps
Fix: Rear transmission mount (dog bone) wears prematurely due to soft rubber compound. Replacement is straightforward: 1-1.5 hours. Recommend inspecting all motor mounts at same time; front lower tends to tear around 80k.
Estimated cost: $250-450
Torque Converter Shudder
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Vibration or shudder during light acceleration at 30-50 mph, Feels like driving over rumble strips when converter locks up, Worse when transmission is warm, May temporarily improve after fluid change, then return
Fix: Often linked to degraded ATF or the oil cooler issue contaminating fluid. First step: complete fluid exchange with Mazda FZ fluid (not universal ATF). If shudder persists, torque converter replacement requires transmission removal: 8-10 hours labor. Sometimes dealer TSBs address with updated converter.
Estimated cost: $400-700 (fluid service) or $2,200-3,500 (torque converter)
Backup Camera Intermittent Failure
Occasional · low severity
Symptoms: Black screen or 'camera unavailable' message when shifting to reverse, Distorted or flickering image, Works intermittently, often worse in cold or wet weather, Guidelines not displaying properly
Fix: Connector corrosion or camera module failure. Check harness connector at liftgate first (common water intrusion point). If camera needs replacement: 1-1.5 hours including trim removal and recalibration. One recall issued for camera software update.
Estimated cost: $150-400
Timing Chain Stretch (Rare but Documented)
Rare · high severity
Typical onset: 100,000-150,000 mi
Symptoms: Rattling noise from front of engine on cold start that fades after 10-15 seconds, Check engine light with cam/crank correlation codes (P0016, P0017), Rough idle or misfires, Loss of power
Fix: Skyactiv-G engines generally have durable timing chains, but extended oil change intervals or low oil can cause stretch. Replacement requires front engine disassembly: tensioners, guides, VVT gears. 10-14 hours labor. Inspect oil consumption history first.
Estimated cost: $2,500-4,000
Owner tips
Change transmission fluid every 30,000 miles with genuine Mazda FZ ATF, not 'lifetime fill' — prevents torque converter and cooler issues
Inspect coolant reservoir regularly for signs of milkshake (ATF/coolant mixing) — early catch saves the transmission
Verify fuel pump recall completion before purchase; check NHTSA database by VIN
Use quality 0W-20 synthetic and keep oil changes under 5,000 miles to protect timing chain and VVT system
Address transmission mount clunks early; broken mounts accelerate wear on CV axles and sub-frame bushings
Solid buy if the transmission oil cooler and fuel pump recall have been addressed — just stay on top of fluid changes and avoid the 'lifetime' ATF myth.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: Compact group size; battery located in engine bay
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Every control module on the 2018-2021 Mazda CX-3 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Sensor calibration auto-learns after driving cycles
Rear View Camera Module (RVM)0.5 hr R&Rno coding
📍 Integrated with rear camera assembly, above license plate
⚠️ Plug-and-play; no coding required
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA · 23V487000
2023-07-14
Mazda North American Operations (Mazda) is recalling certain 2014-2018 Mazda3 and 2016-2021 CX-3 vehicles. The rearview camera image may not display properly by showing a flickering or distorted image.
Consequence: A rearview camera that does not display properly can reduce the driver's rear view, increasing the risk of a crash or injury.
Remedy: Dealers will inspect and replace the rearview camera, as necessary. In addition, dealers will install a wiring harness fastening seal. All repairs will be performed free of charge. Interim notification letters, notifying owners of the safety risk, were mailed September 13, 2023. Final owner letters for affected models and model years in the states of CT, MA, MD, NJ, NY, PA and VA were mailed August 14, 2024. The remaining owner notification letters will be mailed at a future date, anticipated on or before May 1, 2025. Owners may contact Mazda customer service at 1-800-222-5500, Option 6. Mazda's number for this recall is 6023G.
Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3, Mazda6, 2019 CX-3, 2018-2019 MX-5, CX-5, CX-9, and 2019-2020 Mazda2 vehicles. The impeller inside the low-pressure fuel pump may crack and deform, potentially causing the fuel pump to fail.
Consequence: Fuel pump failure may cause an engine stall, increasing the risk of a crash.
Remedy: Dealers will replace the fuel pumps, free of charge. Owner notification letters were mailed July 18, 2022. Owners may contact Mazda customer service at 1-800-222-5500 Option 4. Mazda's number for this recall is 5321K.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2019 Mazda CX-3 2.0L I4 PE-VPS and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.