Bosch warm-up regulator 0438140057 Mercedes W123 280E 280CE 280TE 280SE 280SL 280GE
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Refurbished Bosch warm-up regulator for the M110. Bosch warm-up regulator 0438140057 for the K-Jetronic of the Mercedes-Benz W123/C123/S123, W116, R107/C107 model series and the W460 G-Model with six-cylinder M110 engine (280 E, 280 CE, 280 TE, 280 SE, 280 SEL, 280 SL, 280 SLC, 280 GE). The regulator was completely disassembled, cleaned and set on the test bench to Bosch specification.
Completely disassembled and cleaned · New diaphragm, heating element and seals · 5-year warranty
Control pressure ✓Springs ✓
The control pressure was adjusted on the test bench to Bosch specification and the pressure values recorded; the springs were tested and replaced as needed.
5-year warranty on this refurbished warm-up regulator
Should there be a problem: send the regulator in – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.
| Your options | Condition | Warranty |
|---|---|---|
| New part from Bosch | no longer manufactured | – |
| Untested used regulator | Control pressure and diaphragm condition unknown | none |
| Refurbished genuine part (this listing) | disassembled, new diaphragm and heating element, adjusted on the test bench | 5 years ✓ |
How can you tell a warm-up regulator is faulty?
The warm-up regulator sits in the fuel circuit of the Bosch K-Jetronic between the fuel distributor and the control pressure line and is bolted to the engine block. It regulates the control pressure depending on engine temperature, ensuring correct mixture enrichment during cold running.
The control pressure is lowered via a heated bimetallic element, which raises the control pressure again as operating temperature increases. If this element or the heating coil is defective, the control pressure is no longer regulated correctly during cold running and the mixture enrichment is incorrect.
Detailed diagnostic guide in our guide: Warm-up regulator W123 280E (M110) faulty? Symptoms and testing
What was done during refurbishment
- Complete disassembly into all individual parts
- Cleaning in an ultrasonic bath
- New diaphragm fitted
- New heating element installed
- Springs tested and replaced if needed
- All seals renewed
- Adjusted on the test bench to Bosch specification, pressure values recorded
- Supplied with new copper sealing rings
Fits the following vehicles
W123 / C123 / S123 model series (9/1977 – 8/1981, M110 E28 engine, 2,8 l, 130–136 kW / 177–185 PS)
- 280 E sedan
- 280 CE coupe
- 280 TE estate
S-Class W116 (9/1977 – 7/1980, M110 E28 engine, 2,8 l, 130–136 kW / 177–185 PS)
- 280 SE
- 280 SEL
SL R107 / SLC C107 (9/1977 – 8/1981, M110 E28 engine, 2,8 l, 130–136 kW / 177–185 PS)
- 280 SL
- 280 SLC
G-Model W460 (11/1979 – 8/1981, M110 engine, 2,8 l, 110–115 kW / 150–156 PS)
- 280 GE
- Puch G 280 GE (identical design)
Bosch number 0438140144 is listed under the same Mercedes number and the same Bosch exchange number F 026 TX2 087.
Part numbers: Bosch 0438140057 · Mercedes 000 070 16 62 · Mercedes 110 070 02 62 · Bosch exchange number F 026 TX2 087 · exchange number 0438140144
⚠ Important: compare the part number before buying
Several warm-up regulators were fitted to the M110 six-cylinder over the production period. This regulator carries the end number -057 (Mercedes number 000 070 16 62 or 110 070 02 62) and covers the version from 9/1977 to 8/1981. Vehicles up to 8/1977 require end number -010, vehicles from 9/1981 end number -103; other differing versions are -030, -031, -041, -067 and -147. Compare the number on your old part 1:1 before ordering.
Does not fit:
- W126 280 SE and 280 SEL – different end numbers were fitted depending on model year, please compare the number on the old part
- Vehicles with KE-Jetronic, for example W124 280 E from 1985 – there, an electrohydraulic actuator takes over this task, no warm-up regulator is fitted
- W460 280 GE from 9/1981 – end number -103 there
- Four-cylinder M102 (230 E, 230 CE, 230 TE, 230 GE) – there 0438140065, 0438140097 or 0438140100
- V8 models (350, 380, 450, 500, 560) – own regulator variants
- Carburetor models 280, 280 C and 280 S – no injection system
- Diesel models (200 D, 240 D, 300 D, 300 TD) – no warm-up regulator fitted
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 regulator. If there is a problem, send it in – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.
Does the regulator fit my vehicle?
Compare the part number on your old regulator 1:1 with the number given here. If in doubt, we will check the fit free of charge using your VIN (chassis number) and model year.
What was done to the regulator?
The regulator was completely disassembled, cleaned in an ultrasonic bath and fitted with a new diaphragm, new heating element and new seals. It was then adjusted on the test bench to Bosch specification and the pressure values recorded. Delivery includes new copper sealing rings.
Why not a new part?
Bosch no longer supplies new warm-up regulators. That is why we rely on refurbishing genuine parts.
KFZTeile-Thot specializes in spare parts for Mercedes classic cars and classics – with in-house refurbishment for Bosch K-Jetronic components.
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