ABS PUMP UNIT TOYOTA AYGO X ref 44540-0H180, 89541-0H100-A, Ate 28.5175-4106.3

ABS PUMP UNIT Toyota Aygo X – Ref. 44540-0H180 / 89541-0H100-A / 28.5175-4106.3

1️⃣ Role and purpose of the part

The ABS PUMP UNIT (hydraulic unit + ECU) manages brake regulation and prevents wheel lock during emergency braking.
It also ensures vehicle stability thanks to electronic pressure control and, depending on the configuration, manages ESP/ASR.

This is an essential component for the active safety of the vehicle.

2️⃣ Typical faults requiring replacement

A faulty ABS PUMP UNIT may cause:

• ABS / ESP warning light on the dashboard

• Loss of communication with the ABS ECU

• Hydraulic pump failure

• Internal sensor faults

• Pressure fault or hydraulic leak

• Impossible to erase fault codes

• Irregular or extended braking distance

3️⃣ Checks carried out before shipping

Each ABS PUMP UNIT is tested by Pieces-Okaz:
✔ Electronic communication OK
✔ Hydraulic pump working
✔ ECU operational
✔ Clean, non-oxidised connectors
✔ No cracks or leaks
✔ Complete internal test

Used part, tested and fully functional.

4️⃣ Compatible references

Only the following references are compatible:

• 44540-0H180

• 89541-0H100-A

• 28.5175-4106.3

(No other reference should be used.)

5️⃣ Compatible vehicles

• Toyota Aygo X

(Compatibility guaranteed only if the references match.)

6️⃣ Compatibility warning

The customer must check the reference written on their original ABS PUMP UNIT.
This is the only proof of compatibility.

7️⃣ Advantages

• OEM original Toyota part

• ABS PUMP UNIT (complete hydraulic unit + ECU) tested

• 3-month warranty

• Cost-effective and reliable solution

• Delivery exactly as shown in the photos

8️⃣ Installation advice

• Installation by a professional mechanic is mandatory

• Complete bleeding of the braking system after installation

• Programming / initialisation may be required depending on the vehicle

• Clear old fault codes using a diagnostic tool

• Check fuses and grounds before installation

Mandatory information

Delivered exactly as shown in the photos.
Used part, tested and functional. 3-month warranty.
Installation by a professional recommended.

✅ FAQ – Frequently asked questions

How to check compatibility?
→ Compare references 44540-0H180 / 89541-0H100-A / 28.5175-4106.3 with your original unit.

Is the part tested?
→ Yes, electronic + hydraulic tests are performed before shipping.

Is the part complete?
→ Delivered as shown in the photos (complete ABS PUMP UNIT).

Is programming required?
→ Depending on the vehicle: initialisation may be required using Toyota Techstream.

What is the warranty?
→ 3 months (used part).