2020 Mazda 3 Sport Service and Repair Manual

This factory service and repair manual for the 2020 Mazda 3 Sport treats a hatchback sold in GS, GT and GX trims with a choice of 2.0L or 2.5L gasoline fours. Double overhead camshafts top both engines, and both breathe naturally; the 2.0L displaces 122 cubic inches, the 2.5L 152. The body is a 4-door hatchback, and the manual pairs its procedures and specifications with wiring diagrams and diagnostics for the car.

Engines covered

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

Body styles covered

• 4-door hatchback

Trims covered

• GS
• GT
• GX

Known issues on the 2020 Mazda 3 Sport. The 2020 hatchback's two engines differ in displacement, 2.0L and 2.5L, while sharing double overhead camshafts, natural aspiration and gasoline, and the manual gives engine procedures, specifications and torque values for both. Their fuel and ignition systems carry diagnostics and their cooling system carries service procedures. Wiring diagrams describe the electrical system of the GS, GT and GX, and the brakes, suspension, steering and transmission are documented too.