Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1496 |
| Compression ratio :1 | 13,0 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Description | Map-DI |
| Trigger location | Cam/Crankshaft |
| Fuel system Make | Mazda |
| Fuel system Description | MFI-s(d) |
| Air metering Type | Mass/MAP |
| Combined ignition and fuel ECM | Yes |
| Diagnostic socket | Yes |
Ignition system
| Ignition coil supply voltage + with ballast V | 12,0 |
|---|
Firing order
The firing order for the Mazda MX-5 1.5 (2018–2023) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances on the Mazda MX-5 1.5 (2018–2023) are hydraulic — they self-adjust, so no manual clearance figure applies.
| Valve clearance - INLET mm | Hydraulic |
|---|---|
| Valve clearance - EXHAUST mm | Hydraulic |
Engine oil & fluids
Engine oil
The Mazda MX-5 1.5 (2018–2023) takes 4.3 litres of engine oil with the filter.
See the reference table for the complete engine oil entries and their conditions.
Manual gearbox
The manual gearbox has a listed capacity of 2.0 litres. The specified oil is SAE 75W-90, with classification GL-4.
Coolant
The listed total cooling-system capacity is 5.6-5.8 litres.
See the reference table for the complete coolant entries and their conditions.
Grades, filling conditions and capacities
| Preferred engine oil | |
|---|---|
| Ambient temperature range | All temperatures |
| Engine oil grade SAE | 0W-20, 5W-30 |
| Engine oil options | |
| Ambient temperature range | -30°C➞40°C |
| Engine oil grade SAE | 0W-20 |
| Engine oil classification API/ACEA | SL/A3, A5 |
| Ambient temperature range | -30°C➞40°C |
| Engine oil grade SAE | 5W-30 |
| Engine oil classification API/ACEA | SL/A3, A5 |
| Engine with filter(s) litres | 4.3 |
| Other lubricants and capacities | |
| Manual transmission oil grade SAE | 75W-90 |
| Manual transmission oil classification | GL-4 |
| Manual transmission litres | 2.0 |
| Automatic transmission fluid Type | JWS 3309 |
| Automatic transmission (drain & refill) litres | 7.2 |
| Automatic transmission fluid - drain and refill | |
| Differential oil classification - rear | Mazda long life hypoid SG1 |
| Differential rear litres | 0.6 |
| Coolant Type | FL22 |
| Cooling system - total capacity litres | 5.6-5.8 |
| Brake fluid Type | DOT 3/4 |
| Clutch fluid Type | DOT 3/4 |
Brakes & wear limits
Brake disc thickness
Brake discs on the Mazda MX-5 1.5 (2018–2023) are replaced at a minimum thickness of 20 mm (ventilated) or 20,8 mm (ventilated) front and 7,5 mm or 8,3 mm rear.
| Minimum disc thickness for replacement - ventilated Front | 20 mm |
|---|---|
| Minimum disc thickness after refacing - ventilated Front | 20,8 mm |
| Minimum disc thickness for replacement Rear | 7,5 mm |
| Minimum disc thickness after refacing Rear | 8,3 mm |
Brake disc and drum dimensions
| Disc runout Front | 0,04 mm |
|---|---|
| Minimum pad thickness Front | 2 mm |
| Minimum pad thickness Rear | 2 mm |
Service & electrical
Tuning and emissions
| Tuning conditions | — |
|---|---|
| Idle speed and ignition timing | |
| Ignition timing - basic BTDC °Engine/rpm | 10/710±50 Not adjustable |
| Ignition advance checks °Engine/rpm | ECM Controlled |
| Idle speed rpm | 710±50 Not adjustable |
| Oil temperature °C | 80 |
| CO level at idle speed - tailpipe Vol. % CO | 0,2 Max Not adjustable |
| HC level at idle speed ppm | 100 |
| CO2 level at idle speed Vol. % CO2 | 14,5-16 |
| O2 level at idle speed Vol. % O2 | 0,1-0,5 |
| Increased idle speed for CO test rpm | 2500-3000 |
| CO content at increased idle speed Vol. % | 0,2 |
| Lambda at increased idle λ | 0,97-1,03 |
Service checks and adjustments
| Compression pressure bar | 5,9-8,3 |
|---|---|
| Oil pressure bar/rpm | 1,1-1,7/1500 |
| Oil pressure | |
| Radiator cap bar | 0,93-1,22 |
| Thermostat opens °C | 86-90 |
Fuel system
| Fuel feed/lift pump delivery pressure bar | 4,3-5,0 |
|---|---|
| Engine coolant temperature (ECT) sensor Ohm/°C | 318/80 |
| Injector Ohm | 1,7-2,0 |
Spark plugs
| Spark plugs Original equipment | Mazda |
|---|---|
| Spark plug Type | PE5R/S-18-110 |
| Electrode gap mm | 1,1-1,4 |
Tightening torques
| Cylinder head instructions | — |
|---|---|
| View more information | — |
| Other engine tightening torques | |
| Main bearings Stage 1 | — |
| View more information | — |
| Install bedplate within 10 minutes. | |
| Big end bearings Renew bolts/nuts | Yes |
| Big end bearings Stage 1 | 25±1 Nm |
| Big end bearings Stage 2 | 90°±5° |
| Oil pump to cylinder block | 23±3 Nm |
| Sump bolts | 10±1 Nm |
| View more information | — |
| Assemble components within 10 minutes. Ensure sealant does not enter bolt holes. | |
| Sump drain bolt | 36±5 Nm |
| Flywheel/driveplate | — |
| Flywheel/driveplate | |
| Clutch pressure plate | 29±4 Nm |
| Crankshaft pulley/damper centre bolt | 100±10 Nm+60°±5° |
| Camshaft carrier/cap | 1)6 Nm 2)11 Nm |
| View more information | — |
| Camshaft carrier/cap | |
| Camshaft/rocker cover | 6±1 Nm |
| Inlet manifold to cylinder head | 18±2 Nm |
| Exhaust manifold to cylinder head | — |
| Exhaust manifold to cylinder head | |
| Exhaust downpipe to manifold | 45±6 Nm |
| Water pump | 23±3 Nm |
| Spark plugs | 18±2 Nm |
| Fuel rail | 23±3 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 9±1 Nm |
| Camshaft position (CMP) sensor | 9±1 Nm |
| Engine coolant temperature (ECT) sensor | 20±3 Nm |
| Lambda sensor (Oxygen) | 42±12 Nm |
| Knock sensor (KS) | 20±3 Nm |
| Nitrogen oxide (NOx) sensor | 42±12 Nm |
| Engine oil pressure switch | 15±2 Nm |
| Oil filter | 14±2 Nm |
| Chassis tightening torques | |
| Front hub - wheel bearing housing bolts | 130±6 Nm |
| Rear hub | — |
| Front/rear hub | |
| Rear hub - wheel bearing housing bolts | 130±6 Nm |
| Steering wheel | 45±4 Nm |
| Steering rack/box mounting | 90±14 Nm |
| Steering track rod end | 75±7 Nm |
| Brake caliper to carrier Front | 35±4 Nm |
| Brake caliper/carrier to hub Front | 90±11 Nm |
| Brake caliper to carrier Rear | 23±2 Nm |
| Brake caliper/carrier to hub Rear | 59±7 Nm |
| ABS sensor Front | 9±1 Nm |
| ABS sensor Rear | 9±1 Nm |
| Road wheels | 128±19 Nm |
Air conditioning
| No. of AC service connectors | 2 |
|---|---|
| Air conditioning restrictor type | Expansion valve |
| Compressor clutch/magnetic coupling | Yes |
| Compressor variable displacement solenoid | No |
| Air conditioning refrigerant Type | — |
| Do not mix R134a with R1234yf. | |
| Air conditioning refrigerant quantity grams | — |
| Refrigerant quantity | |
| Air conditioning oil Type | DH-PR YR20 |
| Air conditioning oil quantity cm³ | 130±10 |
Frequently asked questions
What is the firing order of the Mazda MX-5 1.5?
The firing order for the Mazda MX-5 1.5 (2018–2023) is 1-3-4-2.
How much oil does the Mazda MX-5 1.5 take?
The Mazda MX-5 1.5 (2018–2023) takes 4.3 litres of engine oil with the filter. See the reference table for the complete engine oil entries and their conditions.
What are the valve clearances for the Mazda MX-5 1.5?
Valve clearances on the Mazda MX-5 1.5 (2018–2023) are hydraulic — they self-adjust, so no manual clearance figure applies.
What is the minimum brake disc thickness for the Mazda MX-5 1.5?
Brake discs on the Mazda MX-5 1.5 (2018–2023) are replaced at a minimum thickness of 20 mm (ventilated) or 20,8 mm (ventilated) front and 7,5 mm or 8,3 mm rear.