AUTOMOTIVE FRAGRANCE MODULE MANUFACTURER
MAXMAC empowers smart cockpits with advanced in-vehicle fragrance systems. Trusted by more than 20 leading global OEMs, we bring extensive pre-installation development and mass-production experience to automotive partners. Going far beyond a basic consumer car scent, each automotive fragrance module integrates seamlessly with the vehicle’s electronic architecture, central control system, and vehicle HVAC. This enables precise multi-scent switching, intelligent intensity control, and real-time status feedback for a truly premium cabin fragrance experience.
We provide end-to-end OEM development covering structural design, airflow dynamics, hardware engineering, LIN communication, HMI logic, prototyping, and mass-production launch. Supported by ISO 9001 and IATF 16949 quality management certifications and our national CNAS-accredited laboratory, we apply rigorous testing standards to ensure exceptional reliability and stability. MAXMAC helps automotive OEMs transform an Automotive-Grade Fragrance Module from a comfort feature into a key differentiator for the next generation of smart cockpits.
AUTOMOTIVE PRODUCT RANGE
Designed with a pull-out tray structure, the A58 Series supports switching between three fragrances, three airflow levels, LIN 2.1 communication, fragrance information identification, and usage-time recording. Its centralized cartridge layout makes installation, inspection, and replacement straightforward for both vehicle assembly and daily use.
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This exposed, open-style custom fragrance module enhances the visual quality of the vehicle interior while providing flexible OEM integration. It supports three-channel switching, fragrance identification, expiration and remaining-level detection, and fault diagnostics. Dedicated structural and software strategies help reduce scent mixing between channels.
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The EH3 Series features a Push-Push fragrance cartridge installation structure and uses electronic tags to identify three cartridges. It supports fragrance selection through the central HMI, three intensity levels, remaining-level and expiration reminders, and fault feedback for the fan, motor, voltage, and LIN communication.
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The EC24 Series provides a vehicle-integration solution for insert-stick fragrance carriers. It supports a three-scent HMI, LIN 2.1 communication, remaining-level estimation, expiration alerts, and non-original cartridge warnings. Its structure and interfaces can be customized to suit the installation requirements of each vehicle platform.
See DetailsSYSTEM WORKFLOW
From occupant input to fragrance release and real-time status feedback, the in-vehicle fragrance system forms a complete closed-loop workflow.
The occupant selects a fragrance and intensity level through the central display.
The LIN master sends the corresponding control command to the fragrance module.
The module reads the installed cartridge’s fragrance and status information.
The motor moves the internal mechanism to the selected fragrance channel.
The fan operates at the airflow level specified by the control command.
Controlled airflow passes through the selected fragrance carrier.
The fragrance is carried into the cabin through the designated scent-delivery path.
Usage time, remaining level, and fault status are returned to the vehicle’s central display.
During fragrance switching, the fan can be stopped while independent channels and sealing structures help reduce the risk of scent mixing.
Discuss System LogicSMART FRAGRANCE EXPERIENCE
MAXMAC customizes the module structure around each OEM’s space constraints and assembly path, greatly simplifying the fragrance replacement experience for vehicle occupants. Once installed, the fragrance cartridge connects precisely with the module’s internal air duct. A dedicated fan guides airflow efficiently through the fragrance carrier, enabling stable and even fragrance release and rapidly distributing the scent throughout the cabin.
We offer four structural configurations, giving OEMs greater freedom and flexibility in cockpit space planning and industrial layout.
This digital scent technology connects the automotive fragrance module with the vehicle’s central display and communication system. Occupants can view and select from three fragrances directly through the central interface, and the module automatically switches to the corresponding fragrance channel according to the control command.
Each digital scent cartridge can store fragrance identification data and incorporate an anti-counterfeit IC. After a cartridge is installed, the system can read its fragrance type, identification code, and relevant status information and display the data on the vehicle screen, helping automotive brands manage genuine fragrance cartridges and aftermarket refill products.
Occupants can select low, medium, or high fragrance intensity through the vehicle’s central display. The module adjusts fan operation and fragrance diffusion intensity according to the selected setting, providing a more flexible fragrance experience for different occupants, driving scenarios, and cabin sizes.
Three-level intensity control can be integrated with the intelligent cockpit or a smart HVAC system according to the vehicle platform’s control logic. Specific fan speeds, scent-release durations, and operating strategies can be calibrated according to the vehicle platform and complete-vehicle test results.
MAXMAC provides fragrance cartridge and gift-box customization based on an automotive brand’s product positioning, vehicle lineup, and aftermarket sales requirements. Customization can cover cartridge appearance, fragrance combinations, and gift-box structure.
Automotive brands can combine multiple fragrances into an exclusive gift set for use as new-vehicle accessories, branded merchandise, or aftermarket digital scent refills. This creates a complete product ecosystem extending from original vehicle configuration to ongoing fragrance replenishment.
MODULE & INSTALLATION OPTIONS
MAXMAC offers four automotive fragrance module structures for different cockpit spaces, installation paths, and OEM integration requirements. Final dimensions, mounting points, scent-delivery ducts, connectors, and materials are defined according to the boundaries of each vehicle project.
Three fragrance cartridges are installed together in a pull-out tray, making cartridge installation, inspection, and replacement more intuitive. The structure can be integrated into a designated cockpit location and adapted to the vehicle’s mounting points, electrical interfaces, and scent-delivery path.
Explore Tray-Type Structure
The exposed cartridge layout integrates the fragrance module into the vehicle interior as a visible design element. Its structure, surface treatment, cartridge arrangement, and installation interface can be customized to complement the cockpit design while supporting multi-channel scent switching.
Explore Open-Style Structure
The Push-Push structure allows occupants to install or remove each fragrance cartridge with a simple press. It combines convenient cartridge replacement with an integrated cockpit appearance and can be customized around the available installation space and assembly path.
Explore Push-Push Structure
Developed around an insert-stick fragrance carrier, this solution integrates cartridge identification, sealing, installation and removal, and vehicle HMI management. It enables fragrance refills to become part of the automotive brand’s original-equipment and aftermarket ecosystem.
Explore Insert-Stick Structure
CFD AIRFLOW ANALYSIS
During automotive fragrance module development, MAXMAC uses CFD airflow simulation to model internal air ducts, flow velocity, and vortices with precision, validating airflow penetration and fragrance release paths throughout the development process.
Based on simulation data, our engineers refine the air inlet, fragrance chamber, and scent-delivery ducts at the structural level. These optimizations maximize the airflow passing through the fragrance carrier, enabling a highly consistent fragrance diffusion experience and providing a reliable engineering basis for the diverse cabin-space layouts of automotive OEMs. This enables the fragrance module to work as part of the vehicle’s broader air management system, supporting stable and uniform scent delivery.
FRAGRANCE CARTRIDGE PRODUCTION
MAXMAC operates a standardized automated production line for fragrance cartridges. A high-precision controlled dosing process injects a consistent, measured amount of fragrance oil evenly into each fragrance carrier. Strict process control minimizes filling variation between production batches, helping every fragrance cartridge maintain consistent quality and scent-release performance.
After dosing, each fragrance cartridge is sealed using ultrasonic welding. The stable sealed structure reduces the risk of fragrance oil leakage and abnormal evaporation, helping different production batches maintain consistent fragrance release performance and providing reliable fragrance refills for automotive OEM programs.
AUTOMOTIVE FRAGRANCE APPLICATIONS
MAXMAC provides fully integrated in-vehicle fragrance system solutions for multiple automotive brands. Our smart digital fragrance modules have been applied across different vehicle models, helping brand partners create new and differentiated in-cabin experiences. These systems integrate fragrance management into the intelligent cockpit, enhancing cabin comfort across different occupants and driving scenarios.
DENZA APPLICATION
MAXMAC provides a Push-Push automotive fragrance module for BYD DENZA vehicles. Its press-to-release cartridge structure allows occupants to remove or install a fragrance cartridge with a simple push, combining seamless interior integration with convenient everyday replacement.
The system accommodates three fragrance cartridges with different scents. Occupants can switch between fragrances through the vehicle’s central display and select low, medium, or high fragrance intensity. Through controlled airflow, the module delivers continuous and stable fragrance release for a personalized cabin experience across different occupants and driving scenarios.
Explore Push-Push Module
HIPHI APPLICATION
MAXMAC developed a tray-type automotive fragrance module for HiPhi vehicles. Three fragrance cartridges are installed together in a pull-out tray, making cartridge installation, inspection, and replacement more intuitive while allowing the module to be integrated into a designated location within the vehicle.
Occupants can select from three different fragrances through the vehicle’s central display and adjust the fragrance intensity to low, medium, or high. The module switches to the corresponding channel according to the vehicle control command and uses stable airflow to provide continuous fragrance diffusion.
Explore Tray-Type Module
LINCOLN DIGITAL SCENT
MAXMAC’s tray-type digital scent module is applied in a Lincoln cabin fragrance program. The module houses three fragrance cartridges together in a tray structure and supports three selectable scents with low, medium, and high intensity settings, allowing occupants to manage their cabin fragrance through the vehicle’s digital interface.
The system integrates fragrance selection, intensity control, and continuous scent release into the Lincoln digital cockpit experience. Its tray-type structure also provides a clear product path for cartridge installation, identification, and subsequent replacement.
View Lincoln Digital ScentsIN-HOUSE MANUFACTURING
Our in-house SMT production line and engineering team support fragrance-control PCB development from circuit design and interface customization through rapid prototyping and small-batch validation. Keeping these capabilities together shortens iteration cycles and improves electronic consistency before volume production.
Our modular production line supports fragrance-module assembly and efficient changeovers between project configurations. MES-based barcode traceability connects materials, process parameters, inspection records, and finished products to support consistent quality throughout mass production.
FRAGRANCE LABORATORY
MAXMAC operates a dedicated fragrance laboratory to evaluate module performance under real-world application conditions. Through controlled environmental-chamber testing, our engineers measure fragrance diffusion rate, perceived scent intensity, and spatial distribution uniformity.
The resulting data helps us optimize airflow paths, fragrance output, control strategies, and application consistency before project validation and mass production.
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The 3 m³ chamber simulates compact vehicle cabin environments and evaluates how fragrance diffuses and distributes within an enclosed automotive space.
The 10 m³ chamber provides an intermediate test environment for evaluating fragrance delivery, intensity, and distribution performance in larger enclosed spaces.
The 30 m³ chamber simulates typical residential spaces for home scent systems and HVAC-integrated fragrance applications.
TESTING & VALIDATION
MAXMAC’s CNAS-accredited laboratory brings product verification closer to our engineering and manufacturing teams, significantly shortening validation cycles and accelerating the transition from design to volume production. By identifying design weaknesses, potential failure modes, and risk-control points at an early stage, our laboratory capabilities help prevent issues before they reach customers or enter mass production.
Comprehensive mechanical, electrical, environmental, gas, and microbiological testing enables us to verify product performance under demanding operating conditions. This evidence-based validation process strengthens product stability, long-term reliability, and quality consistency while giving OEM/ODM customers greater confidence throughout development and delivery.
SUPPLIER PARTNER
From R&D, engineering validation and calibration to production testing and delivery, MAXMAC provides complete fragrance module development services for OEM and ODM customers.
Our factory is ISO / IATF / CNAS Certified and has served 30+ automotive OEMs, 8 air conditioner OEMs and HVAC equipment manufacturers, plus 100+ small and medium business customers. MAXMAC is a trusted partner for long-term fragrance module development and mass production.
As a professional manufacturer of fragrance modules, our products come with a wide range of certifications and test reports to ensure quality, safety, and performance. These include ISO 14001, ISO 45001, ISO 9001, IATF 16949, CNAS laboratory accreditation, and more. These certifications reflect our commitment to delivering reliable fragrance module solutions that meet global standards.
Field notes from the 2026 Beijing Auto Show on cabin air sensing, CO₂ fresh-air control, AQS, PM2.5, and smart fragrance systems.
See how automotive sensors, vehicle HVAC, fresh-air purification, fragrance, and cockpit AI work together across common driving scenarios.
Explore how air sensors, vehicle HVAC, cabin fragrance, and app interaction work together during parked camping and in-car rest.
Yes. We can develop a technical solution around the available installation space, air ducts, interfaces, LIN and HMI requirements, fragrance carrier, and validation requirements of the vehicle project.
Yes. The communication matrix, control commands, status feedback, and diagnostic logic are jointly defined according to the architecture and requirements of each vehicle platform.
The A58, BYD SG, EH3, and insert-stick specifications all describe three-channel or three-fragrance operation with three airflow levels. The final mass-production configuration is subject to the version confirmed for each project.
Depending on the selected solution, a contact memory device or NFC electronic tag can be used to record the fragrance type, usage time, production date, and identification code and return the relevant status information to the vehicle HMI.
Independent channels, sealing structures, and a software strategy that stops the fan during fragrance switching can be combined to reduce scent mixing.
Depending on the project specification, diagnostics can cover fan, motor, supply-voltage, temperature, and LIN communication abnormalities. The final diagnostic scope is defined for each vehicle project.
Our product experts will provide the most suitable air solutions and product recommendations.
