Introduction
This manual provides essential information for the safe and efficient operation and maintenance of your Bosch Series 4 BGLS4HYG2 bagged canister vacuum cleaner. Please read it thoroughly before first use and keep it for future reference.
Important Safety Instructions
- Read all instructions before using the appliance.
- Do not leave the appliance unattended when plugged in. Unplug from outlet when not in use and before servicing.
- Do not use outdoors or on wet surfaces.
- Do not allow to be used as a toy. Close attention is necessary when used by or near children.
- Use only as described in this manual. Use only manufacturer's recommended attachments.
- Do not use with damaged cord or plug. If appliance is not working as it should, has been dropped, damaged, left outdoors, or dropped into water, return it to a service center.
- Do not pull or carry by cord, use cord as a handle, close a door on cord, or pull cord around sharp edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces.
- Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
- Do not handle plug or appliance with wet hands.
- Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, and anything that may reduce air flow.
- Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
- Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
- Do not use to pick up flammable or combustible liquids, such as gasoline, or use in areas where they may be present.
- Do not pick up toxic material (chlorine bleach, ammonia, drain cleaner, etc.).
- Do not use without dust bag and/or filters in place.
- Turn off all controls before unplugging.
- Use extra care when cleaning on stairs.
- Store your appliance indoors in a cool, dry area.
What's Included
Your Bosch Series 4 BGLS4HYG2 vacuum cleaner package includes the following components:
- Bosch BGLS4HYG2 Vacuum Cleaner Unit
- Flexible Hose
- Telescopic Tube
- Universal Double Position Brush
- Crevice Nozzle
- Upholstery Nozzle
- AirFresh Dust Bag (4L capacity)
- UltraAllergy Washable Filter

Image: The Bosch Series 4 BGLS4HYG2 vacuum cleaner unit, flexible hose, telescopic tube, universal brush, crevice nozzle, upholstery nozzle, and a dust bag are displayed on a white background.
Initial Setup and Assembly
- Attach the Hose: Insert the flexible hose into the suction opening on the main unit until it clicks securely into place.
- Connect the Telescopic Tube: Attach the telescopic tube to the handle of the flexible hose. Adjust the length of the telescopic tube to a comfortable height by pressing the release button and extending or retracting.
- Attach the Floor Nozzle: Connect the universal double position brush to the end of the telescopic tube. Ensure it is firmly attached.
- Insert Dust Bag and Filter: Open the dust bag compartment. Ensure the AirFresh dust bag is correctly inserted and the UltraAllergy washable filter is in place. Close the compartment securely.

Image: The Bosch Series 4 BGLS4HYG2 vacuum cleaner is shown fully assembled with its hose, telescopic tube, and floor nozzle, positioned in a modern living room.
Video: Vacuum Cleaner Overview
Video Description: This video provides a 360-degree view of a canister vacuum cleaner, demonstrating its maneuverability and how different parts function during operation. It highlights the ease of use and design features.
Operating Your Vacuum Cleaner
- Power On/Off: Plug the power cord into a suitable electrical outlet. Press the On/Off button on the main unit to start the vacuum cleaner.
- Adjust Suction Power: Use the electronic power variator dial on the main unit to adjust the suction power according to the surface being cleaned. Lower settings are suitable for delicate fabrics, while higher settings are for hard floors and heavily soiled carpets.
- Using the Floor Nozzle: The universal double position brush can be switched between carpet and hard floor modes using the foot pedal on the nozzle.
- Using Specialized Nozzles: For crevices, corners, and upholstery, detach the floor nozzle and attach the crevice nozzle or upholstery nozzle directly to the telescopic tube or hose handle.

Image: A person is actively vacuuming a light-colored carpet with the Bosch Series 4 BGLS4HYG2 vacuum cleaner, demonstrating its use in a home environment.
Maintenance and Care
Dust Bag Replacement
The vacuum cleaner is equipped with an indicator that signals when the dust bag needs changing.
- Turn off and unplug the vacuum cleaner.
- Open the dust bag compartment.
- Carefully remove the full AirFresh dust bag. The bag features an anti-odor system and a hygienic lock for clean disposal.
- Insert a new Bosch G ALL type dust bag, ensuring it is correctly seated in the holder.
- Close the dust bag compartment securely.

Image: A detailed view of the Bosch AirFresh dust bag, highlighting its multi-layered structure and the hygienic lock feature designed for clean and easy disposal.
Filter Cleaning
The UltraAllergy filter is washable and should be cleaned regularly to maintain optimal performance.
- Turn off and unplug the vacuum cleaner.
- Locate and remove the UltraAllergy filter, typically found near the dust bag compartment or at the exhaust.
- Rinse the filter under cold running water until the water runs clear. Do not use detergents or hot water.
- Allow the filter to air dry completely for at least 24 hours before reinserting it into the vacuum cleaner. Do not use a dryer or other heating devices.
- Reinsert the dry filter and close the compartment.

Image: Hands are shown opening the vacuum cleaner compartment, revealing the dust bag and the washable filter, indicating the process of accessing them for maintenance.
Video: Dust Bag and Filter Replacement (Example from similar product)
Video Description: This video demonstrates the process of replacing the dust bag and accessing the filter in a canister vacuum cleaner. While the model shown may differ, the general steps for maintenance are similar.
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Not plugged in; Power outlet fault; Thermal cut-out activated. | Check plug connection; Test outlet with another appliance; Unplug and allow to cool for 30 minutes. |
| Low suction | Full dust bag; Clogged filter; Blockage in hose/tube/nozzle. | Replace dust bag; Clean/replace filter; Check and clear blockages. |
| Unusual noise | Blockage; Motor issue. | Check for and remove blockages; If noise persists, contact customer support. |
| Dust escaping | Dust bag not installed correctly; Filter missing/damaged. | Reinstall dust bag; Check/replace filter. |
Technical Specifications
| Feature | Detail |
|---|---|
| Model Name | ProHygienic Series 4 (BGLS4HYG2) |
| Power | 700 Watts |
| Dust Bag Capacity | 4 Litres |
| Filter Type | Washable UltraAllergy Filter with ProHygienic technology |
| Operating Radius | 10 meters |
| Noise Level | 69 dB |
| Dimensions (L x W x H) | 41 x 29.5 x 26.5 cm |
| Weight | 6 kg |
| Cord Rewind | Automatic |

Image: A visual representation of the Bosch Series 4 BGLS4HYG2 vacuum cleaner with its length (41.0 cm), width (29.5 cm), and height (26.5 cm) clearly marked.
Warranty and Customer Support
Your Bosch Series 4 BGLS4HYG2 vacuum cleaner comes with a 2-year manufacturer's warranty. Additionally, the motor is guaranteed for 10 years. Spare parts are available for 7 years.
For technical assistance, warranty claims, or to order spare parts, please contact Bosch customer service. Refer to the official Bosch website or your purchase documentation for contact details specific to your region.

Image: A prominent circular logo indicating a "10 Years Motor Guarantee" is displayed alongside the Bosch Series 4 BGLS4HYG2 vacuum cleaner, emphasizing the product's durability.