Cold Air Intake for BMW 3 Series G20 G21 / 4 Series G26 / 2 Series G42 B48

The MST Performance BW-B4805 Cold Air Intake is designed for B48 2.0L turbo BMW G-chassis models — the 320i and 330i G20/G21, 420i and 430i G26 Gran Coupe and 220i and 230i G42 — and is available in Australia through Zero Offset.

At its heart is a dedicated G-chassis airbox that works with the factory MAF sensor, paired with an 89mm intake pipe and 89mm reusable high-flow dry filter. The larger, smoother path to the turbo sharpens response and brings out a more aggressive intake note and blow-off sound.

MST's dyno testing recorded +11hp and +13Nm at 6,200rpm, with a noticeable improvement in acceleration and turbo spool. Some later 2025+ vehicles use a revised engine and require MST's alternate BW-B4806 kit, so please contact us with your build date if your car is a late model. MST Performance intakes are sold for motorsport and off-road use — please check your state's roadworthy and modification requirements before fitting to a registered road vehicle.

Zero Offset supplies genuine MST Performance products with local Australian support. If you're unsure whether this kit suits your vehicle or build, get in touch with our team before ordering and we'll confirm fitment for you.

Vehicle Fitment

• BMW 320i / 330i G20 Sedan — 2019+ (B48 2.0L, pre-facelift and facelift)
• BMW 320i / 330i G21 Touring — 2019+ (B48 2.0L)
• BMW 420i / 430i G26 Gran Coupe — 2021+ (B48 2.0L)
• BMW 220i / 230i G42 Coupe — 2022+ (B48 2.0L)
• Some 2025+ models require BW-B4806 — contact us to confirm

Product Details

• Dedicated BMW G-chassis airbox
• Compatible with the factory MAF sensor
• 89mm intake pipe
• 89mm reusable high-flow dry air filter
• +11hp / +13Nm @ 6,200rpm (MST dyno)
• Improved acceleration, turbo spool and induction sound
• Reusable high-flow filter — clean every 20,000 km and replace at 60,000 km
• SKU: BW-B4805

Check Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.

Shop with confidence at Zero Offset. If there is something wrong with the item, or the item isn't right for you, then tell us and we will do our best to assist. Before you get in contact, see our policy below.

How do I return or exchange my order?

If you have placed an order with us, and you decide that the item you have purchased from Zero Offset is not for you based on one of the following reasons below, you can return or exchange it within 30 days of receiving the product once approved by our team. The buyer is responsible for the return postage.

Factory fault or manufacturing defect

Sometimes things may go wrong during production, and that is okay. If your item arrives with a factory fault or manufacturing defect, please email photos to support@zerooffset.com.au with your order number. We urge you to get in contact within 7 days of delivery for our team to best assess the item. If the item is deemed defective, we will issue a replacement sent to you. If a replacement is unavailable, we will issue store-credit, refund or initiate an exchange for another item from our store.

Change of mind

We are confident you will love your new Zero Offset products. However, if you decide that this is not the product for you, then you may return the item if the product(s) meet the conditions set out in this policy. The products must be unused, in their original condition and in their original packaging.

We cannot accept a return if:

• Used items - products must be unused, in their original condition and in their original packaging
• The item has been fitted – screwed, drilled, cut etc.
• You have already returned or exchanged the item once previously (an item can be returned once per order. This does not apply if the original return or exchange was due to a factory fault or manufacturing defect)
• The order was purchased during a promotion where T & C's specified that the item is excluded from the returns policy
  
  

Is Packaging Required?

Zero Offset requires all returns & exchanged items to be re-packaged in its original packaging, including any hardware or promotional items such as stickers, booklets etc. If the returned item is not packaged accordingly, Zero Offset reserves the right to withdraw the order for refund or exchange. You will need to pay for any subsequent re-shipping fees.

Pre-order Cancellation

If you have secured an item(s) through our pre-order service and would like to cancel, we will offer a full refund if the expected time of delivery is delayed by more than two months from its original expected delivery date. For example, if the item was scheduled for mid-late July, you will be eligible for a full refund if the expected delivery date is pushed past the start of October. If our team does notify you of the delay within this period, to which you agree to keep the order with us, the period will then restart two months from the new expected delivery date.

However, if you would like to cancel a pre-order within this new period, the pre-order will be subject to a 20% cancellation fee if the item was paid in full. Please also be advised, if a deposit was made to secure an item(s) and you choose to cancel, you will forfeit that deposit.

1. General Warranty Policy

Shop with confidence knowing that Zero Offset is committed to the quality of our products. Our warranty policies cover manufacturing defects in accordance with the applicable product warranty terms and Australian Consumer Law (ACL).

Where a product is eligible for a warranty remedy, the available remedy will depend on the nature of the issue and the requirements of applicable law. This may include repair, replacement, a refund or another appropriate remedy.

If you experience an issue with a Zero Offset product and believe it may be covered under the applicable warranty, please contact our team via our Contact Us page to discuss your claim.

Please note the following conditions:

• Proof of purchase must be provided (e.g. your Zero Offset order number, #XXXXX) before we can assess your warranty claim.
• Cosmetic damage and general wear and tear resulting from normal product use are not covered under our voluntary warranty, except where required by applicable law.
• Damage or failures resulting from improper care, maintenance, handling or use may not be covered under our voluntary warranty, subject to the ACL.
• The use of unsuitable or acid-based cleaning products that damage or adversely affect automotive products may affect voluntary warranty coverage for the resulting damage. Please contact our team for recommended product care and maintenance instructions.

Nothing in this policy excludes, restricts or modifies any rights or remedies available to consumers under the ACL or other applicable legislation.

2. Parts & Accessories Warranty

Zero Offset offers a one-year voluntary warranty on Zero Offset body kits and accessories, including pre-painted products. This warranty covers manufacturing defects only and does not extend to Zero Offset products purchased second-hand, subject to any rights available under applicable law.

This voluntary warranty does not cover damage, defects or failures resulting from:

• Improper handling, installation or fitment.
• General wear and tear.
• Breakages, scuffs, scratches or other damage caused by external impacts.
• Improper care, maintenance or use.
• Modifications, alterations or repairs carried out incorrectly.

Where a product has been installed incorrectly or modified, any warranty claim may be assessed to determine whether the reported issue resulted from the installation, modification or repair.

All other branded products sold by Zero Offset are subject to the applicable manufacturer's warranty terms and conditions. We recommend reviewing the relevant manufacturer's warranty before purchasing. If you require clarification, please contact our team, who will be happy to assist.

Zero Offset is not responsible for extending a third-party manufacturer's voluntary warranty beyond the terms offered by that manufacturer. However, nothing in this policy limits any rights or remedies you may have against Zero Offset under the ACL.

3. Self-Installation Disclaimer

Customers who choose to install products themselves, or engage a third party to carry out the installation, do so at their own risk with respect to installation-related damage or failures.

Zero Offset cannot be held responsible for damage, defects, product failures or other issues to the extent that they are caused by or result from incorrect installation, improper fitment, misuse or unauthorised modification, subject to applicable consumer rights under the ACL.

Customers are responsible for ensuring that products are installed properly, using appropriate tools, equipment and installation procedures. At all times, we recommend reaching out to our team if you have any questions.

Recommended Installation – Dealers & Installers Across Australia

To ensure the best possible fitment and minimise the risk of installation-related issues, Zero Offset recommends having your products installed by a professional.

We work with a network of dealers and installers across Australia who can assist with the correct installation and fitment of your products. We strongly encourage customers to utilise our network to help minimise the risk of incorrect fitment, product damage and installation-related failures.

To find a dealer or installer near you, please visit our Zero Offset Dealers & Installers Directory.

Customers who choose to undertake installation themselves should ensure they have the appropriate knowledge, tools and equipment to complete the installation correctly.

Where a warranty claim relates to a product that has been self-installed or installed by a third party, Zero Offset may request relevant information and assess the product to determine the cause of the reported issue. If the failure is found to have resulted from incorrect installation or other installation-related factors, the claim may be excluded from coverage under the applicable voluntary warranty to the extent permitted by law.

Self-installation does not automatically void a customer's rights under the ACL. Where a product has a manufacturing defect or fails to meet an applicable consumer guarantee, the customer's rights will be assessed in accordance with the ACL and the circumstances of the claim.

Zero Offset recommends that products requiring specialist knowledge, tools or technical expertise be installed by a suitably qualified professional.

4. Installation Warranty

Where a customer chooses to have their parts installed by Zero Offset in-store, we provide a one-year voluntary warranty on the installation work performed by our team.

This warranty covers defects in workmanship relating to the installation carried out by Zero Offset. It does not extend the manufacturer's product warranty or automatically cover defects in the product itself.

If you believe there is an issue with an installation performed by Zero Offset, please contact our team as soon as possible. We recommend that you do not attempt to rectify the issue yourself or engage another party to alter, remove or repair the installation before we have had an opportunity to assess it.

Unauthorised tampering or subsequent work carried out by a third party may affect coverage under this voluntary installation warranty to the extent that it causes or contributes to the reported issue.

This voluntary installation warranty does not cover issues arising from:

• Improper handling, care or maintenance after installation.
• General wear and tear.
• Breakages, scuffs, scratches or other damage caused by external impacts.
• Removal, alteration, tampering or repair by a third party, including the customer, where this causes or contributes to the issue.
• Natural disasters or other external events beyond our reasonable control, to the extent permitted by law.

If you have purchased extended care, the applicable terms and conditions of that plan will also apply. In the event of any inconsistency, applicable consumer rights under the ACL will prevail.

5. Warranty Claims & Assessment

All warranty claims are subject to assessment and must be supported by proof of purchase and any other reasonable information required to investigate the reported issue.

Depending on the circumstances, Zero Offset may request photographs, installation details, maintenance records or an inspection of the product.

Each claim will be assessed on its individual merits, including the cause of the reported failure and any applicable manufacturer warranty conditions.

Where a claim is accepted, the available remedy will be determined in accordance with the applicable warranty terms and the ACL. Nothing in this policy is intended to exclude, restrict or modify any consumer guarantee, right or remedy that cannot lawfully be excluded, restricted or modified under Australian law.

We are just as keen as you to start your new modification journey. Our team works tirelessly on getting all your orders fulfilled as soon as possible.

When will I receive my item?

Dispatch Times

How soon your order ships depends on the item. Each product page shows its delivery time under the Add to cart button:

• In stock with us: usually dispatched within 1–2 business days.
• Ships direct from the brand: the time shown on the product page. If the brand is out of stock, we'll keep you updated.
• Made to order and pre-order items: the time or estimated date shown on the product page. We'll keep you updated.

Please note, during high sales periods, there may be some delays. For more accurate shipping times, please get in contact with us.

Delivery Times

Once dispatched, delivery time will vary dependent on its destination. For most states including VIC, NSW, QLD and SA, we expect delivery times ranging between 1-5 business days. For WA, NT and TAS we do expect slightly longer freight times. Zero Offset cannot be held accountable to reasonable shipping delays incurred by the freighting company.

While we do our best to have your order delivered within the listed timeframes above, we're not able to guarantee an exact delivery date.

Please note items from your order may be delivered separately. You can keep up to date with delivery times via the tracking link sent to you.

Standard Delivery

All standard delivery services will be Authorised to Leave (ATL). We recommend choosing a postal address that is attended to ensure that someone is available to receive the incoming parcels.

Package Protection+

At the checkout, you can opt for our Package Protection. If this is selected, the item will require a signature on delivery. This package ensures that your item will arrive safely. In the uncommon event that the item is lost or damaged we will replace the item/s under this scheme. In the event of theft, a police report is required to ensure that the claim can be validated. Our team will require a copy of the report with the report number and all the relevant contact information. If the item was delivered to the correct address, and the parcel/s has been signed for, a replacement or refund will not be provided.

Why is my item taking longer than usual?

Sometimes things go astray, and it is completely out of our control. However, we are here to help the best we can. If your item has not been delivered and the ETA for delivery has well and truly passed (more than 15 business days past the expected delivery date), get in contact with the courier and lodge claim. Then contact us and let us know what is happening so we can monitor it on our end as well. If the item is deemed ‘lost’ we will send out a replacement to you. If a replacement is unavailable, we will issue store-credit, refund or initiate an exchange for another item from our store. Please note, that the courier must officially deem the package as "lost" before we can send out a replacement.

My package arrived damaged

We are sorry to hear this. Don’t panic, we are here to help. To resolve any claims as quickly as possible, please send us photos of the items damaged in transit. You must notify us of the damages within 7 days of delivery. This will ensure that the claim damages fall within the warranty window. Please contact our team through the Contact Form. Our team will then request photos and other evidence to progress the claim.

Do not install or attempt to install any item you believe to be damaged or faulty, as this may affect our ability to accurately assess the issue. If the item is installed, this may impact the outcome of your claim where the damage is found to have been caused or worsened by further use or improper installation.

If an item is confirmed to be damaged that is not due to misuse or improper installation, we will provide a replacement or refund. If a replacement is unavailable, we will issue store-credit, an exchange or refund.

We may request that the item be returned to us for assessment. Please retain the item until the claims process is complete. Where a return is required due to a confirmed fault, we will cover reasonable return shipping costs.

The tracking says delivered, but I have not received the item

Unfortunately, this can occur for many reasons including parcel mishandling, theft or system error made by the Courier. In this event, we urge you to contact the courier service immediately. For those who have selected our package protection at checkout, we will send out a replacement to you without delay. If a replacement is unavailable, we will issue store-credit or offer an exchange.

Please note: Each claim is assessed by our team and reviewed thoroughly to ensure a timely resolution for any of the delivery issues. Zero Offset reserves the right to reject any claims that do not meet the criteria, therefore the customer will need to seek resolution through the courier or local authorities in the event of delivery theft.

Rural Areas Shipping

Our shipping prices are fixed for Metro areas in each state. However, additional shipping charges may apply if the postal address is in a rural area.

Delivery Attempt and Return Fee Policy

To ensure timely and successful delivery of all orders, we have implemented the following policy regarding multiple delivery attempts and returned packages:

1. Delivery Attempts
   If a delivery cannot be completed due to the recipient being unavailable, providing an incorrect address, or refusing the package, additional delivery attempts may be made at the discretion of the carrier.

2. Fees for Multiple Delivery Failures
   If multiple delivery attempts are unsuccessful, additional delivery charges may apply. These fees cover the cost of re-dispatching your order and are the responsibility of the customer.

3. Returned to Sender
   If a package is returned to us due to failed delivery attempts, refusal, or an incorrect/incomplete address, a Return-to-Sender Fee and Re-shipping Fee will be charged before the item is re-shipped.
   Alternatively, if the order is canceled after being returned, the original shipping fee and a return processing fee will be deducted from any applicable refund.

4. Customer Responsibility
   It is the customer's responsibility to ensure that all shipping information provided is accurate and that someone is available to receive the delivery.

Return Postage

If there is a change of mind return or exchange, the buyer is responsible for all return postage fees and costs.