Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1987 |
| Compression ratio :1 | 14,0 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Make | Toyota |
| Ignition system Description | Map-DI |
| Fuel system Make | Toyota |
| Fuel system Description | MFI-s |
| Air metering Type | Mass |
| Combined ignition and fuel ECM | Yes |
| Diagnostic socket | Yes |
Ignition system
| Ignition coil Make | Denso |
|---|---|
| Ignition coil Type | 90919-02277 |
| Ignition coil supply voltage + with ballast V | 12,0 |
Firing order
The firing order for the Toyota Prius 2.0 PHEV (2023–2026) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances on the Toyota Prius 2.0 PHEV (2023–2026) 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 Toyota Prius 2.0 PHEV (2023–2026) takes 3.9 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 | 0W-16 |
| Engine oil classification ILSAC | GF-6B |
| Engine oil classification API/ACEA | SN |
| Engine oil options | |
| Ambient temperature range | All temperatures |
| Engine oil grade SAE | 0W-20 |
| Engine oil classification ILSAC | GF-6A |
| Engine oil classification API/ACEA | SN |
| Ambient temperature range | All temperatures |
| Engine oil grade SAE | 5W-30 |
| Engine oil classification ILSAC | GF-6A |
| Engine oil classification API/ACEA | SN |
| Engine with filter(s) litres | 3.9 |
| Other lubricants and capacities | |
| Automatic transmission fluid Type | Toyota e-Transaxle fluid TE |
| Automatic transmission (drain & refill) litres | 3.67 |
| Do not drive vehicle in inspection mode as damage to the vehicle may occur. | |
| Coolant Type | Toyota SLLC |
| Coolant Colour | Pink |
| Cooling system - total capacity litres | 6.1 |
| Repeat steps 7-8 four times. | |
| Brake fluid Type | DOT 3/4 |
| Brake fluid litres | — |
Brakes & wear limits
Brake disc thickness
Brake discs on the Toyota Prius 2.0 PHEV (2023–2026) are replaced at a minimum thickness of 25 mm (ventilated) front and 10,5 mm rear.
| Minimum disc thickness for replacement - ventilated Front | 25 mm |
|---|---|
| Minimum disc thickness for replacement Rear | 10,5 mm |
Brake disc and drum dimensions
| Disc runout Front | 0,05 mm |
|---|---|
| Disc runout Rear | 0,15 mm |
| Minimum pad thickness Front | 1,5 mm |
| Minimum pad thickness Rear | 2 mm |
Service & electrical
Battery
The Toyota Prius 2.0 PHEV (2023–2026) uses a 12 V, 45 Ah battery.
| Battery V/RC(Ah) | 12 (45) |
|---|
Spark plugs
The Toyota Prius 2.0 PHEV (2023–2026) uses Bosch 0 242 129 535 spark plugs with a 0,8 mm electrode gap.
| Spark plugs Original equipment | Denso |
|---|---|
| Spark plug Type | FC16HR-Q8 |
| Electrode gap mm | 0,7-0,8 |
| Spark plugs Make | Bosch |
| Spark plug Type | 0 242 129 535 |
| Electrode gap mm | 0,8 |
| Electrode gap mm | 0,7 |
| Spark plugs Make | NGK |
| Spark plug Type | DILKAR6T8 |
| Electrode gap mm | 0,8 |
Tuning and emissions
| Tuning conditions | — |
|---|---|
| View more information | — |
| Ignition timing | |
| 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 | 0,2 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 |
| 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 | 8,0-14,0 |
|---|---|
| Compression pressure can only be checked using diagnostic equipment. | |
| Oil pressure bar/rpm | 0,8 Min/1500 |
| Oil pressure can only be checked using diagnostic equipment. | |
| Radiator cap bar | 0,74-1,03 |
| Radiator cap | |
| Thermostat opens °C | 80-84 |
Fuel system
| System pressure bar | 3,0-6,4 |
|---|---|
| Fuel feed/lift pump delivery pressure bar | 3,0-6,4 |
| Fuel main pump delivery pressure bar | 30-250 |
| Engine coolant temperature (ECT) sensor Ohm/°C | 2320-2590/20 |
| Injector Ohm | 11,6-12,4 |
| Injector resistance | |
| Lambda sensor (Oxygen) heater Ohm | — |
| Oxygen sensor (O2S) heater resistance | |
| Throttle motor Ohm | 0,3-1,0 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolts on the Toyota Prius 2.0 PHEV (2023–2026) are tightened in 3 stages: 50 Nm, then 90°, then a final 90°.
| Cylinder head | |
|---|---|
| Tighten | 50 Nm |
| Tighten | 90° |
| Tighten | 90° |
| Cylinder head instructions | — |
|---|---|
| View more information | — |
| Other engine tightening torques | |
| Main bearings Renew bolts/nuts | — |
| View more information | — |
| Main bearings | |
| Main bearings Stage 1 | 61 Nm |
| Main bearings Stage 2 | 90° |
| Big end bearings Renew bolts/nuts | — |
| View more information | — |
| Big end bearings | |
| Big end bearings Stage 1 | 38 Nm |
| Big end bearings Stage 2 | 90° |
| Oil pump to cylinder block | 24 Nm |
| Sump bolts | — |
| View more information | — |
| Wait 2 hours before starting engine or filling engine with oil to allow sealant to dry. | |
| Sump drain bolt | 40 Nm |
| Flywheel/driveplate | -/150 Nm |
| After installing driveplate wait 1 hour before starting engine. | |
| Crankshaft pulley/damper centre bolt | 260 Nm |
| Camshaft sprocket/gear | — |
| Camshaft sprocket/gear | |
| Camshaft carrier/cap | — |
| View more information | — |
| Wait 2 hours before starting engine or filling engine with oil to allow sealant to dry. | |
| Camshaft/rocker cover | 8 Nm |
| View more information | — |
| Wait 2 hours before starting engine. | |
| Inlet manifold to cylinder head | 24 Nm |
| Exhaust manifold to cylinder head | 26 Nm |
| Exhaust downpipe to manifold | 43 Nm |
| Water pump | 43 Nm |
| Spark plugs | 20 Nm |
| Fuel rail | 29 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 10 Nm |
| Camshaft position (CMP) sensor | 8 Nm |
| Lambda sensor (Oxygen) | 44 Nm |
| Knock sensor (KS) | 20 Nm |
| Engine oil pressure switch | 15 Nm |
| Wait 1 hour before starting engine. | |
| Oil filter | 18 Nm |
| Chassis tightening torques | |
| Front hub | 216 Nm |
| Front hub - wheel bearing housing bolts | 130 Nm |
| Rear hub - wheel bearing housing bolts | 90 Nm |
| Steering wheel | 62 Nm |
| Steering rack/box mounting | 133 Nm |
| Steering track rod end | 49 Nm |
| Steering track rod end | |
| Brake caliper to carrier Front | 34 Nm |
| Brake caliper/carrier to hub Front | 107 Nm |
| Brake caliper to carrier Rear | 34 Nm |
| Brake caliper/carrier to hub Rear | 107 Nm |
| ABS sensor Front | 9 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 | R1234yf |
| Do not mix R134a with R1234yf. | |
| Air conditioning refrigerant quantity grams | 1500±30 |
| Air conditioning oil group | PAG |
| Air conditioning oil Type | ND-Oil 11 |
| Air conditioning oil quantity cm³ | 228±7 |
| Air conditioning oil viscosity ISO | 46 |
Frequently asked questions
What is the firing order of the Toyota Prius 2.0 PHEV?
The firing order for the Toyota Prius 2.0 PHEV (2023–2026) is 1-3-4-2.
What spark plugs does the Toyota Prius 2.0 PHEV use?
The Toyota Prius 2.0 PHEV (2023–2026) uses Bosch 0 242 129 535 spark plugs with a 0,8 mm electrode gap.
How much oil does the Toyota Prius 2.0 PHEV take?
The Toyota Prius 2.0 PHEV (2023–2026) takes 3.9 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 2.0 PHEV?
Valve clearances on the Toyota Prius 2.0 PHEV (2023–2026) are hydraulic — they self-adjust, so no manual clearance figure applies.
What is the cylinder head torque for the Toyota Prius 2.0 PHEV?
The cylinder head bolts on the Toyota Prius 2.0 PHEV (2023–2026) are tightened in 3 stages: 50 Nm, then 90°, then a final 90°.
What is the minimum brake disc thickness for the Toyota Prius 2.0 PHEV?
Brake discs on the Toyota Prius 2.0 PHEV (2023–2026) are replaced at a minimum thickness of 25 mm (ventilated) front and 10,5 mm rear.