Is it dangerous to drive with this module faulty?

Yes, treat this seriously — a sudden loss or major change in power assist while driving is a genuine safety concern, especially at low speed or during manoeuvring, so get it diagnosed promptly.

Does this module need calibration after replacement?

Yes, on most modern vehicles the new unit needs to be calibrated to the vehicle via diagnostic equipment for correct operation.

What is the module made of?

A sealed electronic circuit board, sometimes integrated with the EPS motor itself.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Hydraulic booster control unit HYUNDAI I30 2012

Name: Hydraulic booster control unit HYUNDAI I30 2012
Brand: HYUNDAI
SKU: A656399500
Price: 40.50 EUR
Availability: InStock

OEM: A656399500

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The power steering control module (EPS module) manages the electric power steering motor, calculating the correct amount of assist based on speed and steering input.

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Not sure about compatibility? Send us a question with your car's make, model and year.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Steering warning light on the dashboard
Heavy steering effort or inconsistent assist
Diagnostic fault code related to the module itself

Installation information

Mounted on or near the steering rack/column, connecting to the vehicle wiring harness — requires specialist calibration after replacement.

Donor vehicle description

VIN: TMAD251RADJ036535
Make, model: HYUNDAI I30
Year: 2012
Engine: Diesel 1.4CRDI 66KW D4FC - U2 DOHC - TCI
Transmission: 6-speed Mechanic- ZD96
Drive: 2WD
Equipment: LHD
Colour: COOL RED [TWR]

179 parts from this car

Frequently asked questions

This module calculates less assist at higher speeds for stability and more assist at low speed for easy parking manoeuvres — a fault here can disrupt this balance or remove assist entirely.

What our customers say

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Price: affordable. Service: electrical equipment repair.
A
Andris B.
September 2026
Price: excellent.
D
Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
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Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
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Igors K.
Front fender
October 2025