Vaillant MAG 125/11 OZ Open spare parts
In brief
Instalpunt supplies 50 original parts for the Vaillant MAG 125/11 OZ Open, including gas valves and gas control, ignition and ionisation, thermostats and controls. Order online.
- 50Spare parts
- 21In stock
- €5.89From
- 10Types
Looking for parts for the Vaillant MAG 125/11 OZ Open (instantaneous water heater)? Below are all 50 original parts, grouped by part type. Choose a type to jump straight to the right table.
- Gas valves and gas control 2
- Ignition and ionisation 1
- Thermostats and controls 1
- Burners 2
- Displays and controls 1
- Valves 4
- Gaskets and seals 15
- Pipes, tubes and hoses 2
- Casing and panels 1
- Fixing material 10
- Other parts 11
Gas valves and gas control for the Vaillant MAG 125/11 OZ Open (2) all Vaillant gas valves and gas control →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant venturi 188 MAG 135/1-7 | 8050044 Mfr. no. 010013 | €27.95 | Made-to-order item | View & order |
| Vaillant venturi 212 MAG135/1-12 | 8050353 Mfr. no. 012806 | €24.95 | Made-to-order item | View & order |
Ignition and ionisation for the Vaillant MAG 125/11 OZ Open (1) all Vaillant ignition and ionisation →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant piezo igniter MAG VC/W + Sine VGH | 8051140 Mfr. no. 091060 | €87.95 | Not available | View & order |
Thermostats and controls for the Vaillant MAG 125/11 OZ Open (1) all Vaillant thermostats and controls →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant thermostatic element MAG/7TZW 19/2XZ-R1 | 8051790 Mfr. no. 171125 | €45.95 | In stock | View & order |
Burners for the Vaillant MAG 125/11 OZ Open (2) all Vaillant burners →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant pilot injector 0.18 MAG135/1400/7 135/12 b | 8050510 Mfr. no. 040550 | €17.95 | In stock | View & order |
| Vaillant pilot injector 025 MAG135/7so17 11 | 8050593 Mfr. no. 042825 | €17.95 | In stock | View & order |
Displays and controls for the Vaillant MAG 125/11 OZ Open (1) all Vaillant displays and controls →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant control knob MAG9/2XZ-DGXZ-B | 8058170 Mfr. no. 125138 | €22.95 | Made-to-order item | View & order |
Valves for the Vaillant MAG 125/11 OZ Open (4) all Vaillant valves →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant water flow regulator set | 8051630 Mfr. no. 144016 | €19.95 | In stock | View & order |
| Vaillant water stop valve MAG135/771/11/12 | 8050995 Mfr. no. 081712 | €56.95 | Made-to-order item | View & order |
| Vaillant gas stop valve angled MAG135/11 A25 082777 | 8054186 Mfr. no. 082777 | €112.95 | Made-to-order item | View & order |
| Vaillant gas stop valve straight MAG135/11 A25 | 8054185 Mfr. no. 082776 | €103.95 | Made-to-order item | View & order |
Gaskets and seals for the Vaillant MAG 125/11 OZ Open (15) all Vaillant gaskets and seals →
Pipes, tubes and hoses for the Vaillant MAG 125/11 OZ Open (2) all Vaillant pipes, tubes and hoses →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant reducer MAG 135/12 b 9/2 b | 8055872 Mfr. no. 088421 | €41.95 | Made-to-order item | View & order |
| Vaillant water section union nut MAG135/7,71/11/12 | 8050098 Mfr. no. 010144 | €25.95 | Made-to-order item | View & order |
Casing and panels for the Vaillant MAG 125/11 OZ Open (1) all Vaillant casing and panels →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant top section | 8050440 Mfr. no. 013034 | €78.95 | In stock | View & order |
Fixing material for the Vaillant MAG 125/11 OZ Open (10) all Vaillant fixing material →
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Vaillant diaphragm plate spring MAG135-400VCW | 8050040 Mfr. no. 010009 | €10.95 | In stock | View & order |
| Vaillant drain screw MAG135/1-12 | 8050095 Mfr. no. 010138 | €15.95 | In stock | View & order |
| Vaillant screw M4x12 060009 | 8050735 Mfr. no. 060009 | €21.95 | Made-to-order item | View & order |
| Vaillant stop cam spring MAG135/771/11/12 | 8050077 Mfr. no. 010085 | €21.95 | Made-to-order item | View & order |
| Vaillant retaining ring 4mm | 8052232 Mfr. no. 492112 | €10.95 | Made-to-order item | View & order |
| Vaillant spindle MAG135/1-12 | 8050090 Mfr. no. 010094 | €44.95 | Made-to-order item | View & order |
| Vaillant screw MAG VCW VUW brass | 8050060 Mfr. no. 010050 | €22.95 | Made-to-order item | View & order |
| Vaillant screw m4x8 | 8050737 Mfr. no. 060018 | €21.95 | Made-to-order item | View & order |
| Vaillant screw 118889 | 8058145 Mfr. no. 118889 | €11.95 | Not available | View & order |
| Vaillant nut 8mm | 8055876 Mfr. no. 080049 | €22.95 | Made-to-order item | View & order |
Other parts for the Vaillant MAG 125/11 OZ Open (11)
Fault code on your Vaillant MAG 125/11 OZ Open? This is the part type involved
Common Vaillant fault codes and the part type that is usually the cause; the parts for this model are listed above.
| Code | What is going on | Part type |
|---|---|---|
| F.01 | Ignition fault (no flame detection), no gas / gas tap closed, no ignition | Ignition and ionisation |
| F.105 | Gas valve offset in D.052 set incorrectly | Gas valves and gas control |
| F.25 | Break in the wiring harness of the burner, fan and gas valve | Gas valves and gas control |
| F.26 | Gas valve stepper motor current implausible | Gas valves and gas control |
| F.27 | Incorrect ionisation measurement | Ignition and ionisation |
| F.27 | Ionisation signal with gas valves closed | Gas valves and gas control |
For guidance only: the same code can have a different cause depending on the situation.
Other Vaillant instantaneous water heaters
- Vaillant MAG 11, 12 Open Propane 50
- Vaillant MAG 11-0/0 XZ Open 56
- Vaillant MAG 135/11 O Open 48
- Vaillant MAG 135/11 XZ Open 50
- Vaillant MAG 135/12 XZ Open 50
- Vaillant MAG 135/7 TTB Open 48
- Vaillant MAG 135/71 Open 45
- Vaillant MAG 135/71 SO17 Open 47
- Vaillant MAG 135/71 TTB Open 48
- Vaillant MAG 14-0/0 GX Open 62
- Vaillant MAG 14-0/0 XI Open 63
- Vaillant MAG 144/1 G(K-NL)L Open 43
Frequently asked questions
Which parts are available for the Vaillant MAG 125/11 OZ Open?
The catalogue lists 50 original parts for the Vaillant MAG 125/11 OZ Open, including gas valves and gas control, ignition and ionisation, thermostats and controls, burners. All parts are listed above, grouped by type, with part number and price.
How much does a gas valve for the Vaillant MAG 125/11 OZ Open cost?
The gas valves and gas control for this model cost between €11.11 and €18.30 incl. VAT. Check the table "Gas valves and gas control" above for the right part number.
Are the parts for the Vaillant MAG 125/11 OZ Open in stock?
21 of the 50 parts are in stock; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days. Parts marked "Made-to-order item" are ordered specially for you; the delivery time is shown on the product page.
How do I know which part I need for the Vaillant MAG 125/11 OZ Open?
Search for the part by part number or use the parts list of the Vaillant MAG 125/11 OZ Open. Is your appliance showing a fault code? The fault code table shows the matching part type.
Are these original Vaillant parts?
Yes. All 50 parts in this list are original manufacturer parts for the Vaillant MAG 125/11 OZ Open, supplied through the official technical wholesale channel and with the correct part number.
How much do parts for the Vaillant MAG 125/11 OZ Open cost?
Parts for the Vaillant MAG 125/11 OZ Open range from €5.89 to €299.26 incl. VAT. The exact price of each part is shown in the tables above.
Can I return a part?
As a consumer you have a 14-day right of withdrawal. You may unpack and inspect the part; do not install or connect it. For a part that has been installed, connected or damaged we deduct the diminished value, up to the full price for circuit boards.