Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1497 |
| Compression ratio :1 | 13,0 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Make | Toyota |
| Ignition system Type | TCCS |
| Ignition system Description | Map-DI |
| Trigger location | Cam/Crankshaft |
| Fuel system Make | Toyota |
| Fuel system Description | MFI-s |
| Air metering Type | Mass |
| Diagnostic socket | Yes |
Firing order
The firing order for the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are 0,17-0,23 mm inlet and 0,27-0,33 mm exhaust, measured cold.
| Valve clearance - INLET mm | 0,17-0,23 cold |
|---|---|
| Valve clearance - EXHAUST mm | 0,27-0,33 cold |
Engine oil & fluids
Engine oil
The Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) takes 3.7 litres of engine oil with the filter.
See the reference table for the complete engine oil entries and their conditions.
Coolant
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 | 5W-30 |
| Engine oil classification API/ACEA | SL/A1, A3 |
| Engine oil options | |
| Ambient temperature range | -18°C➞38°C |
| Engine oil grade SAE | 10W-30 |
| Engine oil classification API/ACEA | SL/A1, A3 |
| Ambient temperature range | -12°C➞38°C |
| Engine oil grade SAE | 15W-40 |
| Engine oil classification API/ACEA | SL/A3 |
| Ambient temperature range | -7°C➞38°C |
| Engine oil grade SAE | 20W-50 |
| Engine oil classification API/ACEA | SL/A2 |
| Engine with filter(s) litres | 3.7 |
| Other lubricants and capacities | |
| Automatic transmission fluid Type | ATF WS |
| Automatic transmission (drain & refill) litres | 3.8 |
| Do not drive vehicle in inspection mode as damage to the vehicle may occur. | |
| Coolant Type | Super long life |
| Coolant Colour | Pink |
| Cooling system - total capacity litres | 5.3 |
| View more information | — |
| Cooling system | |
| Brake fluid Type | DOT 3 |
| Brake fluid litres | — |
Brakes & wear limits
Brake disc thickness
Brake discs on the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are replaced at a minimum thickness of 20 mm (ventilated) front and 7,5 mm rear.
| Minimum disc thickness for replacement - ventilated Front | 20 mm |
|---|---|
| Minimum disc thickness for replacement Rear | 7,5 mm |
Brake disc and drum dimensions
| Disc runout Front | 0,05 mm |
|---|---|
| Disc runout Rear | 0,15 mm |
| Minimum pad thickness Front | 1 mm |
| Minimum pad thickness Rear | 1 mm |
| Minimum shoe thickness Rear | 1 mm |
Service & electrical
Spark plugs
The Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) uses Denso SK16R11 spark plugs with a 1,1 mm electrode gap.
| Spark plugs Original equipment | Denso |
|---|---|
| Spark plug Type | SK16R11 |
| Electrode gap mm | 1,1 |
| Spark plugs Make | NGK |
| Spark plug Type | IFR5A11 |
| Electrode gap mm | 1,1 |
Tuning and emissions
| Ignition timing - basic BTDC °Engine/rpm | 10±2/1000 Not adjustable |
|---|---|
| Ignition advance checks °Engine/rpm | ECM Controlled |
| Idle speed rpm | 1000±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 | 1400-1600 |
| 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 | 8,82 |
|---|---|
| Oil pressure bar/rpm | 1,5-5,5/2250 |
| Radiator cap bar | 0,74-1,03 |
| Thermostat opens °C | 80-84 |
| Drive belt tension - AC mm | 9-12 |
Fuel system
| Regulated pressure with vacuum bar | 3,0-3,4 |
|---|---|
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor Ohm | 985-1600 |
| Injector Ohm | 13,4-14,2 |
| Lambda sensor (Oxygen) heater Ohm | 11,0-16,0 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolts on the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are tightened in 4 stages: 15 Nm, then 29 Nm, then 90°, then a final 90°.
| Cylinder head | |
|---|---|
| Maximum bolt length | 147,1 mm |
| Tighten | 15 Nm |
| Tighten | 29 Nm |
| Tighten | 90° |
| Tighten | 90° |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Renew bolts/nuts | — |
| View more information | — |
| Main bearings | |
| Main bearings Stage 1 | 22 Nm |
| Main bearings Stage 2 | 90° |
| Big end bearings Renew bolts/nuts | — |
| View more information | — |
| Big end bearings | |
| Big end bearings Stage 1 | 15 Nm |
| Big end bearings Stage 2 | 90° |
| Oil pump to cylinder block | 9 Nm |
| Sump bolts | 9 Nm |
| Sump drain bolt | 38 Nm |
| Flywheel/driveplate | 49 Nm+90° |
| Crankshaft pulley/damper centre bolt | 128 Nm |
| Camshaft sprocket/gear | 64 Nm |
| Camshaft carrier/cap | — |
| Camshaft carrier/cap | |
| Camshaft/rocker cover | 10 Nm |
| Inlet manifold to cylinder head | 20 Nm |
| Exhaust manifold to cylinder head | 27 Nm |
| Exhaust downpipe to manifold | 43 Nm |
| Water pump | 11 Nm |
| Spark plugs | 18 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 8 Nm |
| Camshaft position (CMP) sensor | 8 Nm |
| Engine coolant temperature (ECT) sensor | 20 Nm |
| Lambda sensor (Oxygen) | 44 Nm |
| Knock sensor (KS) | 20 Nm |
| Engine oil pressure switch | 15 Nm |
| Oil filter | 13 Nm |
| Chassis tightening torques | |
| Front hub | 216 Nm |
| Rear hub | 103 Nm |
| Steering wheel | 50 Nm |
| Steering track rod end | 49 Nm |
| Brake caliper/carrier to hub Front | 109 Nm |
| Brake caliper/carrier to hub Rear | 47 Nm |
| ABS sensor Front | 8 Nm |
| Road wheels | 103 Nm |
Air conditioning
| No. of AC service connectors | 2 |
|---|---|
| Air conditioning restrictor type | Expansion valve |
| Compressor clutch/magnetic coupling | No |
| Compressor variable displacement solenoid | No |
| Air conditioning refrigerant Type | R134a |
| Air conditioning refrigerant quantity grams | 450±30 |
| Air conditioning oil group | POE |
| Air conditioning oil Type | Dens Oil 11 |
Frequently asked questions
What is the firing order of the Toyota Prius 1.5 Hybrid Synergy Drive?
The firing order for the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) is 1-3-4-2.
What spark plugs does the Toyota Prius 1.5 Hybrid Synergy Drive use?
The Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) uses Denso SK16R11 spark plugs with a 1,1 mm electrode gap.
How much oil does the Toyota Prius 1.5 Hybrid Synergy Drive take?
The Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) takes 3.7 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 Toyota Prius 1.5 Hybrid Synergy Drive?
Valve clearances for the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are 0,17-0,23 mm inlet and 0,27-0,33 mm exhaust, measured cold.
What is the cylinder head torque for the Toyota Prius 1.5 Hybrid Synergy Drive?
The cylinder head bolts on the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are tightened in 4 stages: 15 Nm, then 29 Nm, then 90°, then a final 90°.
What is the minimum brake disc thickness for the Toyota Prius 1.5 Hybrid Synergy Drive?
Brake discs on the Toyota Prius 1.5 Hybrid Synergy Drive (2003–2009) are replaced at a minimum thickness of 20 mm (ventilated) front and 7,5 mm rear.