Genuine Honda Oil Pump Belt OEM 15140-5AY-H01 – Civic 1.0 Turbo

Genuine Honda Oil Pump Drive Belt OEM 15140-5AY-H01

The Genuine Honda OEM oil pump drive belt, part number 15140-5AY-H01, is a critical component of the lubrication system in 1.0-liter VTEC Turbo engines. Much like the timing belt in this unit, it is a "wet belt" design, meaning it operates directly within an oil bath. It ensures the reliable transfer of power to the oil pump, which is vital for maintaining proper lubrication pressure throughout the engine and the turbocharger.

Using a Genuine Honda part ensures that the belt material is fully resistant to the chemical additives found in modern synthetic oils. Choosing an OEM product eliminates the risk of belt delamination or peeling—a common issue with low-quality aftermarket belts that leads to oil pickup tube blockage and catastrophic engine seizure.

Applications

This belt is exclusively designed for the 1.0-liter VTEC Turbo petrol engines with the P10A2 engine code:

• Honda Civic 5D (Hatchback): 2017-2021 – 1.0 Turbo models
• Honda Civic 4D (Sedan): 2020 – 1.0 Turbo models

OEM Reference Numbers

This part is an official Honda service replacement:

• 15140-5AY-H01

Why is replacing this belt critical?

In P10A2 engines, the oil pump belt undergoes natural wear alongside the timing belt. Its degradation can lead to:

• Loss of belt teeth, resulting in an immediate loss of oil pressure,
• Rubber delamination – particles from the belt fall into the oil pan and clog the oil pump strainer (pickup), cutting off lubrication,
• Turbocharger failure due to operation with insufficient oil supply.

Installation & Service Advice

• Recommendation: The oil pump belt should always be replaced together with the timing belt and the tensioner. The cost of the belt is minimal compared to the risk of engine failure or the labor cost of secondary disassembly.
• During every belt replacement, it is highly recommended to remove the oil pan and thoroughly clean the oil pickup strainer of any deposits.
• Only use oils that meet Honda's specific requirements for 1.0 Turbo engines to ensure maximum belt longevity.

FAQ – Frequently Asked Questions about 15140-5AY-H01

Does this belt run in oil?
Yes, it is a "belt-in-oil" construction. The belt is constantly submerged in engine oil, which is why using a Genuine OEM product is vital. It features a specific structure resistant to solvents and high temperatures.

Can I replace the timing belt and keep the old oil pump belt?
This is considered a serious service error. Both belts have a similar lifespan and operate under the same conditions. An oil pump belt failure is just as dangerous as a timing belt snap—both lead to engine destruction.

What are the symptoms of a failing oil pump belt?
Unfortunately, this belt rarely makes noise before failing. The biggest warning sign is the "Oil Pressure Low" message on the dashboard—this often means the oil strainer is already partially clogged with debris from a delaminating belt.

Does this belt fit the hybrid Jazz or HR-V?
No, the 15140-5AY-H01 belt is dedicated specifically to the turbocharged 1.0 P10A2 engine found in the 10th generation Civic.