Parts for your 2014 Toyota Vitz|yaris-Radiator cap

2014 Toyota Vitz/Yaris Radiator Cap

Based on Toyota’s technical literature for the XP130-series Vitz/Yaris (2011–2017) and the Toyota Electronic Parts Catalog for 2014 Vitz/Yaris variants (KSP130, NSP130, NCP131), this model uses a pressurised cooling system with a radiator cap on the radiator filler neck. The workshop manual’s cooling section outlines “Radiator Cap Inspection/Replacement” and specifies a pressure range typically around 78–108 kPa (approx. 0.8–1.1 bar), confirming the part is fitted and serviceable on 2014 petrol Vitz/Yaris models. These sources make the radiator cap relevant to servicing on this vehicle.

The radiator cap on a 2014 Toyota Vitz/Yaris isn’t just a lid—it’s a pressure valve that lets the engine run its coolant a bit hotter without boiling. By holding roughly 0.9 bar, it lifts the boiling point of the coolant, keeping temps stable on long runs, up hills, or stuck in summer traffic. It also has a vacuum valve that draws coolant back from the overflow bottle as the engine cools, preventing hoses from collapsing and keeping the system topped up.

With time, seals harden, springs weaken, and the cap can stop holding pressure. That can mean gradual coolant loss, overheating at low speeds, or crusty deposits around the filler neck. As part of regular servicing, it’s smart to have the cap pressure-tested with a cooling system tester. Most workshops will check it at routine intervals, if it can’t hold the specified opening pressure (Toyota’s manual quotes roughly 78–108 kPa), replace it.

Replacement is simple but only when the engine is dead cold. Twist to the first stop to vent any residual pressure, then remove. Wipe the filler neck clean, inspect for nicks, and fit a quality 0.9 bar cap that matches Toyota’s spec (often listed as “Cap Sub-Assy, Radiator, 0.9”). A genuine or high-quality equivalent avoids dramas with sealing and spring rates. After fitting, run the engine to operating temp, let it cool, and recheck the overflow level with Toyota Super Long Life Coolant (pink) as required.

• Common signs a cap needs attention: coolant stains around the neck, frequent top-ups, overheating at idle, or hoses that stay collapsed after cooldown.
• Good practice: inspect the rubber seals each service, pressure-test annually, and renew the cap every few years or if any doubt—cheap insurance for the cooling system.

Treat the cap with respect: under the bonnet it’s a small part doing a big job for the 2014 Vitz/Yaris.

Does a 2014 Toyota Vitz/Yaris actually have a radiator cap?

Yes. For 2014 petrol Vitz/Yaris XP130 models, Toyota’s service procedures and parts catalog show a pressurised radiator with a dedicated radiator cap on the filler neck, plus a non-pressurised overflow bottle.

What pressure rating should the cap be?

Toyota’s cooling system tests for this model specify an opening pressure in the ballpark of 78–108 kPa (about 0.8–1.1 bar). A 0.9 bar cap that meets OEM spec is the usual choice and keeps the boiling point where it needs to be.

How often should the radiator cap be replaced?

There’s no hard-and-fast interval in the handbook, but it’s wise to pressure-test the cap at regular services and replace it if it fails the spec, shows cracked seals, corrosion, or causes repeated coolant loss. Many owners opt to renew it every few years as low-cost preventative maintenance.