Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1799 |
| Compression ratio :1 | 10,8 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Make | Mazda |
| Ignition system Type | ESA |
| Ignition system Description | Map-DIS |
| Trigger location | Cam/Crankshaft |
| Fuel system Make | Mazda |
| Fuel system Type | EGI |
| Fuel system Description | MFI-s |
| Air metering Type | Mass/MAP |
| Combined ignition and fuel ECM | Yes |
| Diagnostic socket | Yes |
Ignition system
| Ignition coil Make | Mazda |
|---|---|
| Ignition coil supply voltage + with ballast V | 12,0 |
Firing order
The firing order for the Mazda MX-5 1.8 (2005–2015) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Mazda MX-5 1.8 (2005–2015) are 0,22-0,28 mm inlet and 0,27-0,33 mm exhaust, measured cold.
| Valve clearance - INLET mm | 0,22-0,28 cold |
|---|---|
| Valve clearance - EXHAUST mm | 0,27-0,33 cold |
Engine oil & fluids
Engine oil
The Mazda MX-5 1.8 (2005–2015) takes 4.5 litres of engine oil with the filter.
See the reference table for the complete engine oil entries and their conditions.
Manual gearbox
See the reference table for the complete manual gearbox entries and their conditions.
Coolant
See the reference table for the complete coolant entries and their conditions.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | ➞40°C |
| Engine oil grade SAE | 5W-20, 5W-30 |
| Engine oil classification API/ACEA | SL/A3, A5 |
| Ambient temperature range | -25°C➞45°C |
| Engine oil grade SAE | 10W-40 |
| Engine oil classification API/ACEA | SL/A3, A5 |
| Engine with filter(s) litres | 4.5 |
| Other lubricants and capacities | |
| Manual transmission oil grade SAE | — |
| Manual transmission oil grade | |
| Manual transmission litres | 2,0 6sp=2,1 |
| Automatic transmission fluid Type | JWS 3309 |
| Automatic transmission (drain & refill) litres | 7.4 |
| Differential oil grade - rear SAE | 90W |
| Differential oil classification - rear | GL-5 |
| Differential rear litres | 0.6-0.8 |
| Cooling system - total capacity litres | 7.5 |
| Brake fluid Type | DOT 3/4 |
| Power steering fluid Type | Dexron III/ATF M-III |
| Power steering fluid litres | 1.2 |
Brakes & wear limits
Brake disc thickness
Brake discs on the Mazda MX-5 1.8 (2005–2015) are replaced at a minimum thickness of 20 mm (ventilated) front and 8 mm rear.
| Minimum disc thickness for replacement - ventilated Front | 20 mm |
|---|---|
| Minimum disc thickness for replacement Rear | 8 mm |
Brake disc and drum dimensions
| Disc thickness variation Front | 0,015 mm |
|---|---|
| Disc thickness variation Rear | 0,015 mm |
| Disc runout Front | 0,05 mm |
| Disc runout Rear | 0,05 mm |
| Minimum pad thickness Front | 2 mm |
| Minimum pad thickness Rear | 2 mm |
Service & electrical
Ignition timing
The ignition timing on the Mazda MX-5 1.8 (2005–2015) is not adjustable.
| Tuning conditions | |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | Not adjustable |
Tuning and emissions
| Tuning conditions | — |
|---|---|
| Tuning conditions | |
| Ignition advance checks °Engine/rpm | ECM Controlled |
| Idle speed rpm | 720±50 Not adjustable |
| Idle speed - alternative rpm | AT=750±50 Not adjustable |
| Oil temperature °C | 80 |
| CO level at idle speed - tailpipe Vol. % CO | 0,5 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 | 2500-2800 |
| CO content at increased idle speed Vol. % | 0,3 |
| Lambda at increased idle λ | 0,97-1,03 |
Service checks and adjustments
| Compression pressure bar | 12,3-17,5 |
|---|---|
| Oil pressure bar/rpm | 2,3-5,2/3000 |
| Radiator cap bar | 0,90-1,20 |
| Thermostat opens °C | 80-84 |
Fuel system
| System pressure bar | 3,5-4,1 |
|---|---|
| Engine coolant temperature (ECT) sensor Ohm/°C | 3650-4020/80 |
Spark plugs
| Spark plugs Original equipment | Mazda |
|---|---|
| Spark plug Type | L303 18 110 |
| Electrode gap mm | 1,25-1,35 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolt torque for the Mazda MX-5 1.8 (2005–2015) is 5 Nm.
| Cylinder head | |
|---|---|
| Maximum bolt length | 146,5 mm |
| Tighten | 5 Nm |
| Tighten | 15±1 Nm |
| Tighten | 45±1 Nm |
| Tighten | 90°±2° |
| Tighten | 90°±2° |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Stage 1 | — |
| View more information | — |
| Main bearings | |
| Big end bearings Renew bolts/nuts | — |
| View more information | — |
| Big end bearings | |
| Big end bearings Stage 1 | 29 Nm |
| Big end bearings Stage 2 | 90°±10° |
| Oil pump to cylinder block | 1)10±2 Nm 2)20±3 Nm |
| Sump bolts | 20±3 Nm |
| Sump drain bolt | 35±5 Nm |
| Flywheel/driveplate | 112±4 Nm |
| Bolts/nuts | |
| Clutch pressure plate | 29±4 Nm |
| Crankshaft pulley/damper centre bolt | 100±4 Nm+90±3° |
| Camshaft sprocket/gear | 72±3 Nm |
| Camshaft carrier/cap | 1)7±2 Nm 2)16±2 Nm |
| Camshaft/rocker cover | 9±1 Nm |
| Inlet manifold to cylinder head | 18±2 Nm |
| Exhaust manifold to cylinder head | 54±10 Nm |
| Exhaust downpipe to manifold | 45±7 Nm |
| Water pump | 10±2 Nm |
| Spark plugs | 12±2 Nm |
| Fuel rail | 23±3 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 7±1 Nm |
| Camshaft position (CMP) sensor | 7±1 Nm |
| Engine coolant temperature (ECT) sensor | 12±2 Nm |
| Lambda sensor (Oxygen) | 39±10 Nm |
| Knock sensor (KS) | 20±4 Nm |
| Engine oil pressure switch | 15±3 Nm |
| Oil filter | 18±2 Nm |
| Chassis tightening torques | |
| Front hub - wheel bearing housing bolts | 57±3 Nm |
| Bolts/nuts | |
| Rear hub | 255±20 Nm |
| Steering wheel | 44±5 Nm |
| Steering rack/box mounting | 90±15 Nm |
| Steering track rod end | 53±6 Nm |
| Brake disc to hub Front | 12±3 Nm |
| Brake caliper to carrier Front | 26 Nm |
| Brake caliper/carrier to hub Front | 90 Nm |
| Brake disc to hub Rear | 12±3 Nm |
| Brake caliper to carrier Rear | 23 Nm |
| Brake caliper/carrier to hub Rear | 58 Nm |
| ABS sensor Front | 9±2 Nm |
| ABS sensor Rear | 9±2 Nm |
| Road wheels | 103±10 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 | R134a |
| Air conditioning refrigerant quantity grams | 450 |
| Air conditioning oil group | PAG |
| Air conditioning oil Type | DH-PR |
| Air conditioning oil quantity cm³ | 130 |
| Air conditioning oil viscosity ISO | 100 |
Frequently asked questions
What is the firing order of the Mazda MX-5 1.8?
The firing order for the Mazda MX-5 1.8 (2005–2015) is 1-3-4-2.
How much oil does the Mazda MX-5 1.8 take?
The Mazda MX-5 1.8 (2005–2015) takes 4.5 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 1.8?
Valve clearances for the Mazda MX-5 1.8 (2005–2015) are 0,22-0,28 mm inlet and 0,27-0,33 mm exhaust, measured cold.
What is the cylinder head torque for the Mazda MX-5 1.8?
The cylinder head bolt torque for the Mazda MX-5 1.8 (2005–2015) is 5 Nm.
What is the ignition timing for the Mazda MX-5 1.8?
The ignition timing on the Mazda MX-5 1.8 (2005–2015) is not adjustable.
What is the minimum brake disc thickness for the Mazda MX-5 1.8?
Brake discs on the Mazda MX-5 1.8 (2005–2015) are replaced at a minimum thickness of 20 mm (ventilated) front and 8 mm rear.