Bosch cold start valve 0280170412 blue Mercedes W124 W126 W201 190E 300 E Ferrari
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Original Bosch cold start valve, blue housing, refurbished. Bosch cold start valve 0280170412 with blue housing and long nozzle tube, fits Mercedes models with the M103 engine (W124, W126, W201, R107) as well as Ferrari models with K-Jetronic. Genuine, fully disassembled, cleaned and tested.
Fully disassembled and cleaned · Tested and fully functional · 5-year warranty
Genuine ✓Tested ✓Functional ✓
Every valve is a genuine Bosch part, fully disassembled, cleaned and function tested.
5-year warranty on this refurbished valve
Should a problem occur: send in the valve – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.
| Your options | Condition | Warranty |
|---|---|---|
| Untested used part | Condition and function unknown | none |
| Refurbished genuine part (this listing) | fully disassembled, cleaned and tested, fully functional | 5 years ✓ |
How can you tell a cold start valve is defective?
The cold start valve of the Bosch K-/KE-Jetronic injects extra, finely atomized fuel into the intake manifold when starting the cold engine, enriching the mixture. It is controlled via the thermo-time switch, which limits the injection duration depending on temperature. If the valve fails, this additional cold-start enrichment is missing, and the cold engine starts poorly.
The valve is located on the intake manifold or intake plenum, bolted via a 2-hole flange. Fuel supply is via a union nut fitting, and it is controlled via a 2-pin connector.
Fits the following vehicles
W201 (1987–1993, M103)
- 190 E 2.6
W124 (1987–1992, M103)
- 260 E
- 260 E 4MATIC
- 300 E
- 300 E 4MATIC
- 300 CE (C124)
- 300 TE (S124)
- 300 TE 4MATIC (S124)
W126 (1987–1991, M103)
- 260 SE
- 300 SE
- 300 SEL
R107 (1987–1989, M103)
- 300 SL
Ferrari (K-Jetronic)
- Testarossa (1984–1991)
- 512 TR (1991–1994)
- 512 BBi (1981–1984)
- 400i (1979–1985)
- 412 (1985–1989)
Part numbers: 0280170412 (Bosch) · A 000 071 47 37 (Mercedes) · 000 071 47 37 (Mercedes). Price is per piece. Scope of delivery: see product photos.
Which variant fits? Comparing the three Bosch numbers
| Bosch number | Identifying feature | Fits |
|---|---|---|
| 0280170403 black · blue short |
black or blue-gray, short nozzle tube | M102/M103/M116/M117 up to 08/1987 |
|
0280170412 blue (this listing) · green |
blue or green, long nozzle tube | M103 six-cylinder from 09/1987, Ferrari K-Jetronic |
| 0280170447 yellow |
yellow housing | 24V engines, 190 E 1.8, 200 E / 230 E |
⚠ Important: Compare the variant before buying
Blue housing with long nozzle tube — the stamped marking 0280170412 is the decisive identifying feature. Technically identical to the green version 0280170412, the color difference only indicates the production period. Do not confuse it with the also-blue valve 0280170403 with a short nozzle tube. Compare the stamped marking as well as the Mercedes cross-reference number A 000 071 47 37 of your old part 1:1.
Does not fit:
- Early M103 up to 08/1987 (use the predecessor valve 0280170403 with short nozzle tube)
- 24V engines (300 E-24 and others use 0280170447)
- Facelift models from 6/1993 (E 320 etc., M104 with HFM — no longer has a cold start valve)
- Diesel engines
Does this part fit your car? Send us the VIN (chassis number) and model year – we'll check it for free: 0179 8991069 (Mon–Fri 8 am–6 pm) or via our contact form.
FAQ
What warranty is provided?
5-year warranty on this refurbished valve. If there is a problem, send it in – we will repair or replace it. In addition, there is a 60-day return policy and free shipping within Germany.
Does this valve fit my vehicle?
First compare the stamped marking on your old valve: this variant has a blue housing with a long nozzle tube and the number 0280170412. If unsure, we'll check the fit using your VIN (chassis number) free of charge.
What is the difference between the blue and the green version of the 0280170412?
Technically both are identical, the color difference only indicates the production period. However, do not confuse this valve with a long nozzle tube with the also-blue 0280170403, which has a short nozzle tube — the stamped marking 0280170412 is decisive.
KFZTeile-Thot specializes in spare parts for classic Mercedes and classics – with in-house refurbishment for Bosch K-/KE-Jetronic components.
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