IKEA Bookcase Spare Parts: The guide to repairing and saving your furniture

Paper is one of the heaviest materials. A loaded bookcase supports hundreds of kilograms for years. As a result, the wood eventually bows, the structure sags, or screws are pulled out during a move.

There is no need to buy everything new. The standardization of IKEA bookcase spare parts makes it possible to refurbish almost any model, from the classic BILLY to the modular KALLAX.

Which model do you own?

The diagnosis depends on the material. The BILLY and KALLAX primarily use particle board or honeycomb paper. They are sensitive to bending. The HEMNES and IVAR use solid wood (pine), which is more robust but prone to cracking if the fasteners are over-tightened.

Why is my Billy bookcase leaning?

This is the most common issue. The furniture loses its squareness and tilts sideways. The culprit is almost always the hardboard back panel.

This back panel does not just hide the wall: it provides structural rigidity. If it detaches, the furniture wobbles. Check your back panel nails. If they are bent or missing, the furniture sags. Nail the panel around its entire perimeter, every 10 centimeters, to stabilize the unit.

Also check your cam locks. These metal drums lock the top and base. If they are worn, the furniture becomes loose. Always replace them with original parts to avoid splitting the particle board.

How to stop shelves from sagging?

Does the shelf form a "smile" in the middle? This is bowing. Particle board has a load limit (often 30 kg). Beyond that, physics takes over.

The problem sometimes comes from a bent or lost shelf support pin. The shelf then tilts dangerously. Never replace a support pin with a wood screw: the threading will destroy the pre-drilled hole and tear the wood under the weight of the books.

To limit bowing, distribute the load. Place the heaviest books on the edges. If you store encyclopedias, prefer the HEMNES range in solid pine.

Why is my Kallax wobbling?

The KALLAX uses a recycled honeycomb paper frame. It is lightweight, but fragile at pressure points.

The looseness often comes from the long Allen screws. They must bite into the internal wood reinforcement. If you have over-tightened them, you may have crushed the honeycomb structure. The screw then spins freely.

Replace them with original screws. A standard hardware store screw does not have the correct threading and will pass through the wood without securing anything. Tighten with moderation.

Also check the wooden dowels. They hold the inner grid and often break during moves. Remove any remaining pieces with pliers before inserting new 8 mm dowels.

How to adjust Oxberg doors that rub?

Adding glass doors shifts the center of gravity forward. Wall mounting then becomes mandatory.

If your doors overlap, use the 3D adjustable hinges. The front screw manages the left/right offset, while the rear screw adjusts the depth. A quarter turn is often enough to achieve perfect alignment.

Also check your silicone bumpers. These pads prevent the glass from slamming against the wood and protect your hinges from premature wear.

Securing and maintaining your bookcases

A loaded piece of furniture is a tipping risk, especially with children. The wall mounting bracket is the most vital part.

Forget the default provided wall plugs. Use Molly bolts for drywall or expansion nylon plugs for concrete. A solid anchor is the only guarantee against accidents.

Repair tip: If a hole in the particle board has become too wide, fill it with toothpicks and wood glue. Let it dry, cut the excess, then screw back in. The fastening will be dense and solid again.

For transport, never lay a bookcase flat. The central weight will bend the side walls. Always carry it on its edge and remove all support pins to prevent them from puncturing the structure.

You will find the exact references for your parts and your assembly instructions just below.