Proper maintenance of the brake system is the key not only to your safety, but also to the safety of expensive vehicle suspension components. Crossover owners Skoda Kodiaq are often faced with a design feature of the rear axle: it is installed here electronic parking brake. This complicates the procedure for replacing pads compared to classic mechanical handbrake brakes, where you just need to squeeze the piston.
Without specialized diagnostic equipment, it is almost impossible to return the brake calipers to their original position, since the mechanism has a built-in gear motor. An attempt to mechanically press the piston without first switching to service mode will lead to breakdown of the electric motor or cracks in the caliper body. In this article, we will look at how to safely perform the procedure on your own, using a minimal set of tools and a diagnostic interface.
Preparation of instruments and diagnostic equipment
Before you begin physically removing the wheels and calipers, you need to make sure you have everything you need to do the job correctly. The main difficulty is Skoda Kodiaq does not involve unscrewing bolts, but rather controlling the electronics of the brake system. You will need access to the on-board network to put the brakes in service mode.
The most affordable way is to use an adapter ELM327 in combination with a smartphone or laptop with specialized software installed. Applications such as Carista, VCDS (VAG-COM) or Car Scanner ELM OBD2 are ideal for Czech car brands. It is important that the adapter supports communication protocols with the ABS/ESP unit, where the handbrake control logic resides.
In addition to diagnostic equipment, prepare a standard set of plumbing tools:
- ๐ง A set of socket heads (usually 13, 15, 17 mm) for removing calipers and brackets
- ๐จ Hammer and chisel for removing rusty cotter pins (if applicable to your modification)
- ๐งด Aerosol lubricant such as WD-40 or special brake cleaner
- ๐งค Gloves and safety glasses for working with brake dust
Don't forget to buy new ones brake pads and, preferably, a set of guide calipers if the old ones show signs of wear or seizing. The quality of consumables directly affects braking efficiency and the absence of extraneous noise during operation.
Switching the electronic handbrake to service mode
This is a critical step that cannot be skipped. If you begin to unscrew the calipers before the pistons go in, you risk injury from a flying piston or damage to the mechanism itself during subsequent assembly. The procedure is performed with the ignition on, but with the engine turned off.
Connect the diagnostic adapter to the OBDII connector, which is usually located under the steering column or in the driver's foot well. Launch the appropriate application and wait until communication with the brake control unit (ABS) is initialized. In the menu, select the item responsible for controlling the brake system or parking brake.
You need to find a function called "Service mode", "Brake pad reset" or "Retraction of parking brake". After selecting this command, you will hear the characteristic whirring of the electric motors at the rear - this means that the pistons are starting to retract.
โ ๏ธ Attention: Do not turn off the diagnostic equipment or turn off the ignition until the application reports successful completion of the operation. Interrupting the process may result in loss of synchronization and errors in the ABS unit.
Once the process is complete, the handbrake icon or brake warning light may illuminate on your dashboard - this is normal as the system is waiting for components to be replaced. Now you can safely begin the mechanical part of the work without fear of spring resistance.
- Diagnostic scanner (ELM327)
- Dealer equipment VCDS
- Specialized VAS tester
- I'm trying to do it manually without a scanner
Removing wheels and calipers
Once the electronics are out of the way, you can begin to physically access the brake mechanism. Loosen the wheel bolts with the vehicle stationary, then jack up the vehicle and place it on a secure stand. Remove the wheel and inspect the condition of the disc and caliper.
In design Skoda Kodiaq The rear caliper is usually secured with two guide bolts at the top and bottom. Their head is often hidden under decorative plugs that need to be carefully pryed off with a screwdriver. After removing the plugs, unscrew the bolts with the correct size wrench.
- ๐ฉ Use a torque wrench for subsequent tightening to avoid stripping threads.
- ๐ Do not hang the caliper on the brake hose, tie it with a wire to the suspension spring
- ๐งผ Clean the bracket seats from dirt before installing new parts
Remove the old caliper and remove the worn pads. Pay attention to the condition of the guide bushings: if they become stiff or lose elasticity, they need to be replaced. Ignoring this point will lead to uneven wear of the new pads and possible jamming.
โ๏ธ Removing the caliper
Mechanism maintenance and installation of new components
Before installing new pads, you must thoroughly clean the caliper bracket and apply a special high-temperature lubricant to the metal-to-metal contact points. Never use regular motor oil or graphite grease as they can destroy the rubber seals and lead to corrosion.
If there are signs of corrosion on the caliper body, carefully sand them off with fine sandpaper. Make sure the piston is in the fully recessed position. In some cases, you may need to lightly twist the piston to align the threaded part of the mechanism, but only if you use a special twist plate rather than a screwdriver.
Install new pads into the bracket. Make sure that the spring clips (if included) fit snugly against the disc and do not interfere with the movement of the caliper. Before final assembly, check whether the caliper moves freely on the guides.
โ ๏ธ Attention: Make sure that the protective boots on the guides are not damaged. Water and dirt getting inside the bushings will cause the caliper to seize in the near future.
Reinstall the caliper and tighten the guide bolts to the recommended torque. Usually for Skoda Kodiaq this value is about 30 Nm, but it is better to check the exact data in the service documentation for your specific modification.
How to check brake disc wear?
To accurately assess the thickness of the disc, use a micrometer. The minimum permissible thickness is usually indicated on the disk itself or in the technical documentation. If the disc has deep grooves or wear of more than 1-2 mm, it must be replaced along with the pads.
Returning the electronic handbrake to operating mode
After assembling the brake mechanism, it is necessary to remove the system from service mode. To do this, reconnect the diagnostic device to the OBDII connector. Make sure all wheels are installed and the vehicle is on a level surface.
From the application menu, select a function "Exit service mode" or "Activate parking brake". The system will check for new pads and automatically adjust the gap between the pads and the disc. You will hear the electric motors running again, and the indicators on the instrument panel should go out.
Some models require wear sensor calibration if a new wire sensor is included with the pads. If the sensor has been replaced, make sure the connector is connected tightly and the wire is not kinked. After successfully exiting the mode, you can press the brake pedal several times to press the pads against the disc.
Before driving, be sure to check the operation of the handbrake on an incline. The electronic handbrake should confidently hold the car even with new, not yet worn-in pads.
Technical nuances and common errors
Many owners make the mistake of trying to press the piston mechanically after removing the caliper. This cannot be done without destroying the mechanism, since there is a screw gear inside that requires rotation. Even if the piston is installed, the threads will be damaged, which will lead to expensive repairs or replacement of the entire assembly.
Another common problem is insufficient cleaning of the guides. Even a small grain of sand can cause jamming. Use brake cleaner and a soft brush to remove old grease and dust. The new guides should move freely, but without play.
It is also worth paying attention to the condition of the brake hose. If it shows any cracks or signs of swelling, it should be replaced before work is completed. The braking system does not forgive compromises in terms of reliability.
| Parameter | Value for Skoda Kodiaq | Note |
|---|---|---|
| Guide tightening torque | 30 Nm | Use a torque wrench |
| Brake fluid type | DOT 4 | Replace every 2 years |
| Minimum pad thickness | 2 mm (with metal) | Replacement when limit reached |
| Wheel bolt tightening torque | 120 Nm | Cross-shaped tightening pattern |
โ ๏ธ Caution: Never mix brake fluid from different manufacturers or brands, even if they have the same DOT specification. This can lead to a chemical reaction and brake failure.
The main reason for breakdowns of the rear handbrake on the Skoda Kodiaq is an attempt to mechanically compress the piston without switching to service mode through a diagnostic scanner.
FAQ: Answers to frequently asked questions
Is it possible to replace pads without a scanner?
Technically possible, but highly not recommended. Without a scanner, you will not be able to return the pistons to their original position. An attempt to do this by force will lead to breakdown of the handbrake electric motor, the repair of which costs much more than a car service.
Why do you need to press the brake pedal after assembly?
This is necessary so that the pistons extend and press the pads against the disc. In service mode, the pistons are deeply recessed, and without pressing the pedal you will not be able to move away, since the brakes will not work.
How do you know when it's time to change the pads?
On Skoda Kodiaq There is a wear indicator that lights up on the dashboard. Also, a characteristic metallic grinding noise when braking (if the pads have a worn indicator) or a visual inspection through the wheel will indicate the need for replacement.
Do I need to change the brake fluid when replacing the pads?
No, there is no need to change the fluid when replacing the pads. However, according to the maintenance regulations, brake fluid must be changed every 2 years, regardless of mileage, as it absorbs moisture.
What should I do if after replacement the handbrake error light comes on?
Most likely, the procedure for exiting the service mode was performed incorrectly or the wear sensor is not connected. Connect the scanner again and repeat the activation procedure. If the error persists, the system may need to be adapted through dealer equipment.
Following technology and using the right equipment is the key to successfully replacing rear brake pads. Skoda Kodiaq. Do not skimp on diagnostics and high-quality consumables, because the life of you and your passengers depends on the serviceability of the brakes.