Description
The Genuine OKI Duplex Unit 47079403 is an optional automatic double-sided printing accessory designed for compatible OKI A3 colour printers including the OKI C834nw. Installing the duplex unit enables automatic two-sided printing, helping businesses reduce paper usage and produce professional double-sided documents more efficiently.
✓ Genuine OKI printer accessory
✓ OKI Part Number: 47079403
✓ Adds automatic duplex / double-sided printing
✓ Designed for compatible OKI C834 series printers
✓ Ideal upgrade for OKI C834nw
✓ Helps reduce paper consumption
✓ Genuine OKI fit and compatibility
The 47079403 Duplex Unit is particularly relevant for the OKI C834nw, where automatic duplex printing is an optional upgrade.
The OKI C834dnw already includes automatic duplex printing as standard, so an additional duplex unit is normally not required.
Genuine OKI 47079403 Duplex Unit
The OKI 47079403 Duplex Unit provides compatible OKI printers with automatic two-sided printing capability. Instead of manually turning and reloading pages, the duplex unit automatically handles both sides of the sheet during supported print jobs.
This is particularly useful for offices producing reports, proposals, presentations, manuals, brochures and other multi-page business documents.
Compatible OKI Printers
The OKI 47079403 Duplex Unit is designed for compatible printers in the OKI C834 / ES8434 platform, including selected configurations of:
- OKI C834nw A3 Colour Printer
- OKI C834dnw A3 Colour Printer – duplex is normally factory-fitted as standard
- OKI ES8434dn / compatible ES8434 Series – please confirm exact printer configuration before ordering
Please check the exact printer model and existing configuration before purchasing. If your printer already has automatic duplex printing installed, an additional duplex unit is not required.
Automatic Double-Sided Printing
Once installed in a compatible printer, the 47079403 allows supported documents to be printed automatically on both sides of the paper.
Automatic duplex printing can help:
- Reduce office paper consumption
- Create professional double-sided documents
- Reduce manual handling of multi-page print jobs
- Produce reports, manuals and presentations more efficiently
- Save storage and filing space for printed documents
Designed for OKI C834 A3 Colour Printers
The compact OKI C834 series provides fast A3 colour printing for businesses and workgroups, supporting a wide variety of media sizes and weights.
If you own an OKI C834nw and need automatic double-sided printing, the genuine 47079403 Duplex Unit provides the appropriate upgrade path.
If you are purchasing a printer and require duplex printing from the start, consider the OKI C834dnw, which includes automatic duplex functionality as standard.
Consumables for OKI C834 Series
Looking for replacement toner for your C834 printer? Browse the individual genuine OKI high-capacity toner cartridges:
- OKI 46861312 Black Toner Cartridge – up to 10,000 pages
- OKI 46861311 Cyan Toner Cartridge – up to 10,000 pages
- OKI 46861310 Magenta Toner Cartridge – up to 10,000 pages
- OKI 46861309 Yellow Toner Cartridge – up to 10,000 pages
Browse the complete OKI C834 toner and consumables range.
OKI C834 Drum Units
Individual replacement image drums are also available:
- OKI 46857512 Black Image Drum – approximately 30,000 pages
- OKI 46857511 Cyan Image Drum – approximately 30,000 pages
- OKI 46857510 Magenta Image Drum – approximately 30,000 pages
- OKI 46857509 Yellow Image Drum – approximately 30,000 pages
Other OKI C834 Maintenance Parts & Accessories
- OKI 47219604 Fuser Unit – approximately 100,000 pages
- OKI 47074503 Transfer Belt – approximately 80,000 pages
- OKI 47074403 Additional 535-Sheet Paper Tray
Why Choose a Genuine OKI Duplex Unit?
Using a genuine OKI accessory helps ensure correct mechanical fit, paper handling and communication with the printer. The 47079403 is specifically designed as the duplex option for supported OKI printer configurations.
Ideal For
- Businesses upgrading an OKI C834nw
- Offices requiring automatic double-sided printing
- Businesses looking to reduce paper consumption
- Reports, presentations and manuals
- Professional double-sided A3/A4 document workflows
Frequently Asked Questions (FAQ)
What is the OKI 47079403?
The OKI 47079403 is a genuine automatic duplex printing unit designed for compatible OKI colour printers.
Is 47079403 compatible with the OKI C834nw?
Yes. OKI officially lists the 47079403 Duplex Unit as an option for the C834nw.
Does the OKI C834nw have automatic duplex printing as standard?
No. Automatic duplex printing is optional on the C834nw. Installing the genuine OKI 47079403 Duplex Unit adds automatic double-sided printing capability.
Do I need this duplex unit for the OKI C834dnw?
Normally no. The C834dnw includes automatic duplex printing as standard.
What toner does the OKI C834 use?
The Australian C834 range supports high-capacity 10,000-page toner cartridges including 46861312 Black, 46861311 Cyan, 46861310 Magenta and 46861309 Yellow.
What other maintenance parts are available for the C834?
Replacement parts include individual 468575-series image drums, the 47219604 Fuser Unit and the 47074503 Transfer Belt.
Is this a genuine OKI accessory?
Yes. Part number 47079403 is the genuine OKI Duplex Unit listed by OKI for compatible C834 printer configurations.
Customer Reviews:
Jane D. ★★★★★ "Installing the duplex unit was straightforward, and it has significantly reduced our paper consumption. A great investment for our office."
Mark S. ★★★★☆ "The duplex printing feature works flawlessly, and the print quality remains excellent on both sides. Highly recommended for businesses looking to enhance their printing capabilities."
Last Updated: 1 October 2026

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Refund Policy
The OZ Toner Return Policy applies to all purchases made on this website.
We recommend you read our Returns Policy carefully prior to placing an order and retain a copy of these terms and your order so you are familiar with our policy on refunds, returns and exchanges and your rights under the Australian Consumer Law.
We recommend you immediately examine goods delivered to you to ensure that there are no visible signs of damage or fault and that the goods received match the order you placed. Our exchange/return window is within 30 days of receiving your order. All incorrectly ordered or unwanted returns will incur a minimum 20% restocking fee.
Our Return Address
52A/5 Gladstone Rd, Castle Hill, NSW 2154
Exchange/Return (Consumables)
OZ Toner allows exchange/return within 30 days of receiving your order. This applies to consumable products purchased from us: inks, toners, printing and fax supplies and paper. Please scroll down to read our policy on exchange/return for scanners and printers.
If any consumable goods purchased from OZ Toner are damaged, lost in transit, incorrect or faulty, please contact us at support@oztoner.com with this information:
- Your order number
- Detailed description of the reason for return/exchange request
- Photo proof (if applicable).
For exchanges, the product/s must be in the original (new/unused) condition that you received it, in its original packaging. The customer is responsible for the postage fee to send the product/s back to us. OZ Toner will pay the postage to send the new product/s to the customer. All product/s sent back to us must use tracked post, we are not responsible for product/s lost in transit.
Exchange/Return (Hardware)
OZ Toner allows exchange/return within 30 days of receiving your order. This applies to hardware products purchased from us: scanners and printers.
If any hardware goods purchased from OZ Toner are damaged, lost in transit, incorrect or faulty, please contact us at support@oztoner.com with this information:
- Your order number
- Detailed description of the reason for return/exchange request
- Photo proof (if applicable).
Please ensure to contact us via email at support@oztoner.com before returning any items to obtain a Return Authorization Number. Return Authorizations are only valid for 14 days.
It is your obligation to pack returned products satisfactorily to prevent any damage to the items or boxes. You have a legal obligation to take reasonable care of the product/s while they are in your possession until they reach our warehouse.
When returning your purchase, we ask that you provide a Proof of Purchase (Order Confirmation Email) and where possible the product/s in original unopened packaging.
Once received back, we will issue a replacement or full/partial refund depending on actual case.
Change of Mind Returns
Please choose carefully as we do not provide a refund if you have simply changed your mind or made a wrong selection.
If you wish to exchange product/s which you have purchased in error, we will happily exchange provided that:
- You return the product/s within 30 days of purchase.
- You provide Proof of purchase (Your Order Confirmation Email)
- Product/s are unopened, unused and in its original packaging.
- A minimum of 20% restocking fee applies.
- You must bear the risk of return and is responsible for the costs of return postage.
- You must confirm the product/s are received and notify us before returning the product/s, the product/s being returned must satisfy all the return requirement stated above.
- The initial shipping fee charged, or any outbound postage incurred to ship to the customer will not be refunded or credited.
We reserve the right not to offer an exchange if the above requirements are not met.
Return shipping and costs are the responsibility of the customer. We recommend customers to send the item back with a tracked service. For high value products, the customer is also advised to use an insured shipping method.
Faulty or Damaged items
We provide refund or replacement on defective and damaged products.
You MUST contact us within 30 days of product/s being received and believed to be faulty. We will provide the contact information of manufacturer. Customer MUST contact manufacturer to request return authorization letter / DOA letter. Once we received the RA letter or DOA letter from the customer, we will initiate the return process and send customer our return instruction. When the goods are returned to us, we will offer either refund or replacement for the customer.
Items with Manufacturer Warranty:
Buyers must contact manufacturer of the item for all the warranty service within the warranty period. We will provide contact details of the manufacturer to the buyer. We have no other responsibility (including DOA) for items covered with manufacturer warranty.
Items with Onsite Manufacturer Warranty:
Buyers must contact manufacturer of the item for all the on-site warranty service within the warranty period. We will provide contact details of the manufacturer to the buyer. We have no other responsibility (including DOA) for items covered with manufacturer warranty.
Items with Return to Base Warranty:
Buyers are responsible to send back the faulty item to us. Items with valid warranty within the warranty period will be replaced with fully functional unit after checking. Please allow up to 2 weeks for replacement. We have no guarantee on product compatibility with buyers own equipment unless specified on the item listing.
Any other issues and queries, customers are welcome to send us message and email to discuss further.
Refund Conditions
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Refunds are only issued under certain circumstances, such as:
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DOA products where no exchange/replacement is possible
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Incorrect supply where the proper model cannot be provided
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Approved cases where neither replacement nor upsell option is available
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All refunds must be pre-approved by OzToner.au management before processing.
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Refunds are made via the original payment method and typically processed within 7 business days after approval.
Delivery Charges
Any product/s replaced under the Returns Policy due to being damaged, faulty or incorrect will be delivered to you free of charge.
Any returns due to you changing your mind about your purchase will incur a re-delivery fee.
Consumer Guarantees
Under the Australian Consumer Law, you have Consumer Guarantees for Goods and Services You purchase. Our product/s come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the product/s repaired or replaced if the product/s fail to be of acceptable quality and the failure does not amount to a major failure.
Where you believe an item is faulty, you must contact manufacturer to for it to be assessed within a reasonable period of time, and you must request return authorization letter from the manufacturer if the item is confirmed faulty. If there is a major failure with the item, and you have forwarded the return authorization letter granted by manufacturer to us, you may choose a refund or exchange. If the failure is minor, manufacturer will honor the warranty and repair the item for you within a reasonable time.
Where an item is damaged through misuse or abnormal use, OZ Toner cannot provide a refund, exchange or repair, whether the fault is identified by OZ Toner, the manufacturer or their service agent.
OZ Toner will require satisfactory proof of purchase before providing a remedy under the Australian Consumer Law.
For further information about the Australian Consumer Law and Consumer Guarantees, visit www.consumerlaw.gov.au.



