Siemens SID OLS280 checksum fix online
Rebuilds every self-described CRC block in a Siemens SID read. Upload your file and it comes back ready to use, corrected automatically — the calibration content is never touched, only the integrity value.
Sending costs nothing. We confirm we have your file, run the job on our server and tell you whether we can do it. You decide about paying after that — and you get the same file with a correct checksum.
| Price | 100 credits ($100.00) |
| Accepted | .nav · .bin · .ori · .mod |
| Max size | 16 MB |
| ECU families | SID803 · CANS0D00 · NS052 |
- The same file back with a correct checksum — content untouched
- A yes-or-no answer on your file before you pay anything
- Works from any machine, nothing to install or license
- Charged per file, only when it succeeds
- No copy of your file is kept, ever
| Cummins calibration | 100 cr |
| Calterm configuration | 100 cr |
| Detroit / Mercedes ACM & MCM | 100 cr |
| Bosch EDC17 / MED17 | 100 cr |
How it works
Four steps, and you find out whether it can be done before you pay anything. What you get back is the same file with a correct checksum.
Upload it here. We confirm on screen that it arrived, with its name and size. This costs nothing.
We run the whole job on our server and answer one question: can we do this file, yes or no. If the answer is no you are told why, and nothing is charged — ever.
Only if the answer was yes. The price is shown before you decide, you tick to accept the payment terms, and the credits come off your balance.
Straight away, in the browser. Your file is processed in memory and never written to our disks.
How you pay
This tool costs 100 credits per file. Credits are prepaid and one credit is one US dollar — 100 credits is $100.00, with no subscription, no monthly fee and no minimum order.
You buy credits with a card or a PayPal account on the credits page, in packs — the larger packs carry a bonus, so a shop doing several files a week pays less per file. Credits do not expire and every movement, spent or returned, is listed in your account. Before any payment goes through — buying credits, or spending them here — you tick a box to accept the payment terms, and they are shown in full at that moment rather than hidden behind a link.
If a job fails after you have paid, the credits go back to your balance automatically and a refund line appears in your history. You are never charged for a file you did not receive.
How Siemens SID OLS280 checksum correction works
WinOLS handles this family with the plug-in numbered OLS280 — the Siemens SID803 group. On North American trucks these are the Navistar and MaxxForce files, the ones whose descriptors read CANS0D00 or NS052, and the .nav files that come out of NavKal.
What makes this family pleasant to work with is that the file describes its own protection. Scattered through the read are small descriptors giving the CRC seed, where the checksum is stored, and exactly which byte ranges it covers. Nothing has to be looked up in a table, which means a software line we have never seen still works on the first try.
Each block is a CRC-32 taken over its own ranges and stored big-endian. Upload the read and every block comes back rebuilt — the same file, the same size, with the protection recomputed.
Questions
Yes, once it is decrypted to a plain read. Upload it and the format check confirms it in seconds, free, before anything is charged.
Anything in this family that uses the self-describing descriptor layout — which is what we have verified on SID803-family Navistar and MaxxForce reads. Because the file carries its own description, other variants of the same design usually work too; the free format check is the honest answer for your exact file, and it costs nothing to find out.
No. Only the bytes that hold the checksum are rewritten. Every map, limiter and parameter is returned exactly as you sent it — the file comes back the same size, and if you send a file whose checksum is already correct you get back a file identical to the original, byte for byte.
No. The file is processed in memory and never written to disk. Nothing is stored, nothing is indexed, and the corrected file only exists in your browser once it comes back. Close the tab and it is gone.
The credits go back to your balance automatically and a refund line appears in your credit history. You are only ever charged for a file you actually received.
No. It runs on our server, so it works from a workshop laptop, a phone in the yard, or a machine that has never had tuning software on it. There is no licence, no dongle and nothing to keep alive.