Bosch warm-up regulator 0438140065 K-Jetronic Mercedes W123 230E 230CE 230TE 230 GE
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Refurbished Bosch warm-up regulator for the K-Jetronic. Bosch warm-up regulator 0438140065 for the K-Jetronic of the Mercedes-Benz W123/C123/S123 model series (230 E, 230 CE, 230 TE) and the G-model W460 230 GE with M102 engine. The regulator was completely disassembled, cleaned and adjusted 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 230 E: which end number fits
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 (4/1980 – 12/1985, M102.980 engine, 2.3 l, 100 kW / 136 hp)
- 230 E sedan (123.223)
- 230 CE coupe (123.243)
- 230 TE T-model (123.283)
G-model W460 (4/1982 – 8/1985, M102.981 engine, 2.3 l, 92 kW / 125 hp)
- 230 GE
- Puch G 230 GE (identical design)
Bosch replacement number 0438140146 is identical to our number and directly interchangeable.
Part numbers: Bosch 0438140065 · Mercedes 102 070 01 62 · Mercedes 000 070 20 62 · Replacement number 0438140146
⚠ Important: compare the part number before buying
Three different warm-up regulators were fitted to the M102 engine over its production period. This regulator carries the end number -065 (Mercedes number 102 070 01 62 or 000 070 20 62); the variants -097 (Mercedes 102 070 02 62) and -100 (Mercedes 102 070 03 62) are different versions. Bosch replacement number 0438140146 corresponds to this number and is directly interchangeable. Compare the number on your old part 1:1 before ordering.
Does not fit:
- Vehicles with KE-Jetronic, for example the W124 230 E from 1985 – there, an electro-hydraulic actuator performs this function, no warm-up regulator is fitted
- W460 230 GE from 9/1985 with KE-Jetronic
- Six-cylinder M110 (280 E, 280 CE, 280 SE, 280 SEL, 280 SL, 280 SLC, 280 GE) – there 0438140057, 0438140067 or 0438140103
- V8 models (380, 450, 500, 560) – separate regulator variants
- Carburetor models 230, 230 C, 230 T with M115 engine – 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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