Warm up regulator repair
Get your Bosch K-Jetronic warm up regulator repaired with 6 months warranty! Our workshop offers a reliable and quick reconditioning service with 30 years of experience. We have successfully overhauled hundreds of warm up regulators so far.
Your warm up regulator will be checked, disassembled, cleaned, and adjusted in every temperature ranges. You will get a fully operational warm up regulator back. We will repair your item within 24 hrs.
How to tell if a WUR is broken? I don't find my number on the list, what can I do? Click here!
We can rebuild your unit no matter if it is from a Mercedes, a VW, a Ferrari, a Porsche, a Saab or a Volvo, but please make sure your Bosch WUR part number is on the list below:
0 438 140 004 0438140004
0 438 140 005 0438140005
0 438 140 011 0438140011
0 438 140 013 0438140013
0 438 140 014 0438140014
0 438 140 020 0438140020
0 438 140 026 0438140026
0 438 140 032 0438140032
0 438 140 048 0438140048
0 438 140 049 0438140049
0 438 140 051 0438140051
0 438 140 052 0438140052
0 438 140 055 0438140055
0 438 140 058 0438140058
0 438 140 064 0438140064
0 438 140 065 0438140065
0 438 140 071 0438140071
0 438 140 072 0438140072
0 438 140 073 0438140073
0 438 140 074 0438140074
0 438 140 084 0438140084
0 438 140 088 0438140088
0 438 140 093 0438140093
0 438 140 096 0438140096
0 438 140 097 0438140097
0 438 140 099 0438140099
0 438 140 100 0438140100
0 438 140 111 0438140111
0 438 140 114 0438140114
0 438 140 118 0438140118
0 438 140 119 0438140119
0 438 140 128 0438140128
0 438 140 129 0438140129
0 438 140 132 0438140132
0 438 140 136 0438140136
0 438 140 146 0438140146
0 438 140 157 0438140157
Mending your Bosch K-Jetronic warm up regulator costs 219 Euro, you can pay that amount safely by money transfer or with PayPal. We will take over the postage if you live inside EU. Please note, that if you live outside the EU, additional costs may occur.
![]() |
Please send your item and your contact addresses to:
BMS Motordiagnosztika
2030 Erd Rozsa u. 5.
HUNGARY
If you have any quesions, you can contact us by This email address is being protected from spambots. You need JavaScript enabled to view it. or by phone: +36305988006
If you don't find your WUR number on the list, you have a warm up regulator equipped with additional pressure corrections. The diaphragms of this additional cells can not be rapaired, as there is no good quality spare part available. However, the correction cells only alter the control pressure in a small scale, so if you accept that the cells may not be mended, our repair service will help you considerably.
Like by a new item, warranty void if fuel contamination causes wrong operation after rebuild.
If you have any quesions or want to send your unit, you can contact us by This email address is being protected from spambots. You need JavaScript enabled to view it.
BmS Motordiagnosztika
2030 Erd Rozsa u. 5.
HUNGARY
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Phone: +36305988006