Is a coolant leak in the heater dangerous?

Yes, antifreeze vapour is toxic if inhaled over time, and continued fluid loss can lead to engine overheating — get it repaired urgently.

Is replacing the whole heater unit a difficult job?

Yes, it’s one of the most involved cabin jobs, needing most of the dashboard removed — strongly recommended to leave to a specialist.

What does the heater unit consist of?

A housing with flaps, a fan, the heater radiator, and the actuator system.

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.

Interior heater (stove) VW PHAETON 2003

Name: Interior heater (stove) VW PHAETON 2003
Brand: VW
SKU: 3D1820003M-1
Price: 99.00 EUR
Availability: InStock

OEM: 3D1820003M-1

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?

This heater unit combines the heater radiator, fan and flaps that heat and ventilate the cabin.

Ask a question

Not sure about compatibility? Send us your car's VIN and we'll confirm.

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Signs of a faulty part

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

Heater doesn’t warm up, or blows cold air
A coolant smell in the cabin
Damp accumulating on the front-passenger footwell

Installation information

Needs significant dashboard removal and draining the coolant — a time-consuming job, best left to a specialist.

Donor vehicle description

VIN: WVWZZZ3DZ48007275
Make, model: VW Phaeton
Year: 2003
Engine: Benzīns 3.2 177KW AYT
Transmission: Automatiska GML
Drive: Priekšēja
: Stūre kreisajā pusē
Colour: G4R

349 parts from this car

Frequently asked questions

A classic sign of a leak in the heater radiator inside the unit housing — the fluid evaporates and mixes with the air entering the cabin.

What our customers say

All reviews →

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.
N
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!
E
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.
I
Igors K.
Front fender
October 2025