The service and repair manual for the 2020 Mazda 3 — 2.5L I4 and 2.0L I4 engines, 15 trims. Matched to this exact model year, so the specifications and sequences are the ones Mazda published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2020 |
|---|---|
| Engines | 2.5L I4 — 152 cu in, DOHC 2.0L I4 — 122 cu in, DOHC |
| Trims | Select Sedan 4-Door · Premium Sedan 4-Door · I Sport Hatchback 4-Door · Base Sedan 4-Door · Base Hatchback 4-Door · GS Sedan 4-Door +9 |
| Other 2020 3 variants | 3 Sport → |
| Federal record | 2 recalls · 31 complaints · 682 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2020 3 manual
03 / ContentsSections in the manual
- Quick Lookups 128
- General Information 1,852
- Accessories & Equipment 4,141
- Heating, Ventilation & A/C (HVAC) 576
- Body & Frame 572
- Maintenance 24
- Brakes 724
- Restraints 236
- Drivelines & Axles 119
- Steering 90
- Electrical 996
- Suspension 101
- Engine Mechanical 522
- Transmission 347
- Engine Performance 2,220
- Loosen 180
04 / Known issuesRecalls on federal record for the 2020 3
- Forward Collision Avoidance — automatic emergency braking · 19V907000Stopping the vehicle unexpectedly increases the risk of a crash.
- Service Brakes, Hydraulic — foundation components › disc › caliper · 20V346000Loose brake calipers can reduce braking performance or interfere with wheel rotation, affecting vehicle handling. either of these scenarios can increase the risk of a crash.
Owners have filed 31 complaints and Mazda has issued 682 technical service bulletins for the 2020 3. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2020 3 manual
Is this manual specific to the 2020 3?
Yes. It is the OEM manual matched to the 2020 model year, covering the 2.5L I4 and 2.0L I4 across the Select Sedan 4-Door, Premium Sedan 4-Door, I Sport Hatchback 4-Door, Base Sedan 4-Door, Base Hatchback 4-Door, GS Sedan 4-Door, Premium Hatchback 4-Door, i Grand Touring Hatchback 4-Door, GT Sedan 4-Door, Preferred Sedan 4-Door, i Sedan 4-Door, i Grand Touring Sedan 4-Door, GX Sedan 4-Door, I Sport Sedan 4-Door, Preferred Hatchback 4-Door trims. Specifications and procedure sequences are the ones Mazda published for this year.
What 2020 3 problems does it help with?
2 recalls are on federal record for the 2020 3, covering forward collision avoidance, service brakes, hydraulic. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mazda dealers.
Does it include 2020 3 wiring diagrams?
Yes — the complete wiring diagrams for the 2020 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $49.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther 3 years and 2020 Mazda models
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