Buy a Replacement Diesel fuel Cap from online specialist » the fuel cap company

Secure your car, truck or motorhome with a lockable anti-theft diesel fuel cap with a Free Lifetime Replacement Guarantee*

Adblue® filler neck caps

Does your van or truck run on Adblue®? Find the right filler cap in our dedicated Adblue® section.

Alloy, Steel & Adblue® Filler Necks

Available in various sizes in Mild Steel, Stainless Steel and Aluminium. OEM quality guaranteed.

your specialist diesel fuel cap supplier

Free Lifetime Replacement Guarantee on ALL Caps*

Our lifetime 'Replacement' guarantee means just that. In the unlikely event that your new diesel cap should fail due to normal wear and tear, simply return the fuel cap to us with proof of purchase and we will replace it like-for-like Free of Charge.

Your Fuel Cap Wholesaler

The Fuel Cap Company

Need to Bulk Purchase your fuel caps? Visit Direct Caps part of The Fuel Cap Company. We've fullfilled orders to the UK, South Africa, Asia, Europe and the USA.

Ask the Team. Call our helpline on 07952 384324. Live Chat or Email

If the diesel cap you need is proving hard to find or discontinued, please get in touch. We stock many rare replacement fuel caps such as those listed here.

in stock replacement diesel caps

Actros Linea BlueTec 4 1844 (All Years) fuel cap

MERCEDES BENZ COMMERCIAL Actros Linea BlueTec 4 1844 (All Years)

£24.99 (inc. UK Delivery) In Stock

Part No. DC095 - For models (All Years). Locking options supplied with 2 keys. Dispatched within 24 Hours.

Insignia A (MK1)(G09) (2008 to 2017) fuel cap

OPEL Insignia A (MK1)(G09) (2008 to 2017)

£16.99 (inc. UK Delivery) In Stock

Part No. DC152 - For models (MK1)(G09) (2008 to 2017). Locking options supplied with 2 keys. Dispatched within 24 Hours.

CF75/85 AdBlue Tank (All Years) fuel cap

DAF CF75/85 AdBlue Tank (All Years)

£19.99 (inc. UK Delivery) In Stock

Part No. DC276 - For models (All Years). Locking options supplied with 2 keys. Dispatched within 24 Hours.

Replacement Inline Fuel Filters, Gasket Paper, Hose and Lanyards

For all you mechanics and DIYers, we now stock universal inline fuel filters, gasket papers, spill hose and for commercials, stainless steel lanyards.

For the complete list, visit our Consumables section.

Alloy, Steel & Adblue® Weld-on Filler Necks

We stock Mild Steel, Stainless Steel and Aluminium Alloy weld-on filler necks in various sizes. Each size offers a choice of lockable caps with keys. The DC276 filler neck below is a popular option available to customers. Plastic Adblue filler necks also available.

Mild Steel Filler Neck (105mm x 78mm)

£16.99 (inc. UK Delivery) In Stock

Part No. DC352 - Choice of locking caps available to fit (105mm x 78mm) filler neck. Supplied with 2 keys.

recently purchased

SEAT Leon (Jan 2013 onwards)

£21.99 (inc. UK Delivery) In Stock

Part No. DC179 - This SEAT Leon fuel cap was sold Jun 2025, with a Lifetime Guarantee and Signed-For tracking, for complete peace-of-mind.

FILLER NECKS Mild Steel Filler Neck (80mm x 50mm)

£13.99 (inc. UK Delivery) In Stock

Part No. DC351 - This FILLER NECKS Mild Steel Filler Neck fuel cap was sold Jun 2025, with a Lifetime Guarantee and Signed-For tracking, for complete peace-of-mind.

customer service reviews

Absolutely chuffed to bits

Stan | England

Absolutely chuffed to bits with my purchase,looks really expensive but isn’t,quality top notch,easy to fit as you would expect,but mostly peace of mind knowing that my fuel is safe,also like to mention how quick it was dispatched,definitely recommend this product.

I dropped my Mercedes petrol cap

Maggie | England

I dropped my Mercedes petrol cap knocking the inside part out of line. With so many caps available for the Mercedes l gave up looking, contacted Mark at Petrolcap. As it wasn't broken he thought we could save it. So l sent photos and he talked me through fixing it. Thank you so much Such a lovey man to talk to.

I WhatsApp’d Mark enquiring about locking petrol cap

Ian | UK

I WhatsApp’d Mark enquiring about a lockable fuel cap for my Seat Leon tsi. I gave him my reg number and within minutes he sent me the link to purchase the cap. Order arrived in 3 days, Perfect fit. Highly recommended...

Extremely satisfied customer...

James | Christchurch, New Zealand

Thank you so much for sending out the fuel cap so quickly. Extremely satisfied customer.

about the fuel cap company

A family run business built on trust and service since 2007

The Fuel Cap Company was born out of necessity. Like so many other businesses, it all started when sourcing a quality replacement fuel cap for a friend proved to be far from easy. That was back in 2007. We have been supplying quality fuel caps to our customers ever since. Although the UK remains our largest market, we ship fuel caps all over Europe, to India and Australia and the US and Canada. In fact over the years, we have shipped to over 35 countries from our head office in Oswestry.

Buying from us, you can be assured you are buying a quality product (ISO 9001), manufactured in Europe to OEM standards, from a family run business that thousands of buyers all around the world have come to trust.

Mark Smart - Founder

Fast Secure Payments

Replacing your damaged, missing or lost fuel cap, is quick, easy and secure. Pay using any major credit/debit cards. Orders are dispatched and tracked within 24 hours.

Lifetime Guarantee

In the unlikely event that your new fuel cap should fail due to normal wear and tear, simply return it with proof of purchase and we will replace it like-for-like Free of Charge. Read more.

Price includes Delivery

All our prices include the cost of delivery to an address of your choice. No hidden charges at checkout. Home or Office, it's the same price, sent by Royal Mail Track 48 or DHL Express.

Returns Made Easy

Should you need to return your order, whatever the reason, you'll find the whole process quick, easy and transparent. You'll find a clear guide to Returns on our Help pages.

We know diesel caps. Whatever your question, just ask

Would like some help or advice on which fuel cap your vehicle needs? We are only a phone call away. Or, drop us an email. Please see our contact page for details.

The Fuel Cap Company processes all online electronic transactions through the secure servers of PayPal using SSL encryption. No bank or credit card details are taken or held by the Fuel Cap Company or any of its staff.

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Manufacturer's names and part numbers are used for reference purposes only. Occasionally due to product enhancements, product images will be for illustration purposes only.

The Fuel Cap Company | 01691 596677 | Normal Office Hours Mon - Fri 9am-5pm | 07952 384324 | The Fort Offices, Artillery Business Park, Park Hall, Oswestry, Shropshire SY11 4AD, UK

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