Is it dangerous to drive with a faulty fuel cap?

Not critical for safety, but it wastes fuel through vapour loss and will keep triggering the check engine light — replace when convenient.

How do I know if the cap itself is the problem?

If tightening the cap fully doesn’t clear the fault code after a few drive cycles, the cap’s seal is likely worn and needs replacing.

What is the cap made of?

Plastic with a rubber sealing ring, sometimes with a pressure-relief mechanism.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Fuel filler cap TOYOTA AVENSIS 2012

Name: Fuel filler cap TOYOTA AVENSIS 2012
Brand: TOYOTA
SKU: 7730020020
Price: 9.00 EUR
Availability: InStock

OEM: 7730020020

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The fuel filler cap seals the external opening where fuel is added, keeping the fuel system pressurised correctly and preventing debris or moisture from entering.

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Not sure about compatibility? Send us a question with your car's make, model and year.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Check Engine light with an EVAP/loose fuel cap fault code
Petrol smell near the filler area
Cap won’t tighten or click into place

Installation information

Screws onto the filler neck — always tighten until it clicks to ensure a proper seal.

Donor vehicle description

VIN: SB1ED76L30E098288
Make, model: TOYOTA AVENSIS
Year: 2012
Engine: Diesel TURBO 2000CC 2.0L 91KW 1ADFTV
Transmission: 6-speed Mechanic - MTM
Drive: Front
Equipment: LHD
Colour: 3Q7

274 parts from this car

Frequently asked questions

The EVAP system monitors for a sealed fuel system — a cap that isn’t fully tightened or has a worn seal lets air in, which the system detects as a leak.

What our customers say

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Price: affordable. Service: electrical equipment repair.
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Andris B.
September 2026
Price: excellent.
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Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
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Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
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Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
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Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
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Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
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Igors K.
Front fender
October 2025