2021 Mazda 3 Sport Service and Repair Manual

This factory service and repair manual for the 2021 Mazda 3 Sport covers a year with three engines and four trims on the 4-door hatchback body. Two of the engines are 2.5L inline-fours of 152 cubic inches, one naturally aspirated and one turbocharged; the third is a naturally aspirated 2.0L of 122 cubic inches. All three have double overhead camshafts and run on gasoline. The trims are the 100th Anniversary Edition, GS, GT and GX.

Engines covered

• 2.0L inline-four (122 cu in) — DOHC, naturally aspirated, gasoline
• 2.5L inline-four (152 cu in) — DOHC, naturally aspirated, gasoline
• 2.5L inline-four (152 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 4-door hatchback

Trims covered

• 100th Anniversary Edition
• GS
• GT
• GX

Known issues on the 2021 Mazda 3 Sport. The 2021 hatchback was offered with a turbocharged 2.5L as well as naturally aspirated 2.0L and 2.5L fours, and the manual supplies engine procedures, specifications and torque values for the three of them, along with diagnostics for their fuel, ignition and cooling systems. Transmission, brake, suspension and steering procedures are included, and wiring diagrams trace the electrical system of the four trims, the 100th Anniversary Edition among them.