FAQ
TL;DR: Vectra C won’t start after key repair? A broken/solder-lifted immobilizer coil is typical; replacement keys run 100–200 PLN. “The pilot costs PLN 100–200.” [Elektroda, dbs123, post #16910901]
Why it matters: This FAQ shows how to restore start-up by fixing or swapping the immobilizer antenna coil—without unnecessary reprogramming—for DIYers and budget-minded owners.
Quick Facts
- The immobilizer coil is soldered to the PCB; it is not glued. [Elektroda, tomasz0703, post #16908223]
- It acts as an antenna; replacing only the coil doesn’t require immobilizer programming. [Elektroda, robokop, post #16908287]
- Open-circuit (infinite) resistance indicates a broken coil; replace or transplant one. [Elektroda, Strumien swiadomosci swia, post #16908235]
- Budget for a replacement remote: approx. 100–200 PLN if buying a whole key. [Elektroda, dbs123, post #16910901]
- Some services quote 30–45 PLN for simple key work; Vectra C parts aren’t in the “cheap” tier. [Elektroda, Strumien swiadomosci swia, post #16911179]
How do I fix the Vectra C immobilizer error (car + padlock) after key repair?
Restore the immobilizer coil connection. It must be soldered back onto its PCB pads or replaced with a donor coil. If your coil measures open circuit, transplant a coil from another compatible remote and have a competent tech solder it. This resolves the immobilizer light and starting issue. [Elektroda, Strumien swiadomosci swia, post #16908235]
Does the immobilizer coil need to be glued or soldered?
Solder it. The coil connects to designated solder pads on the key’s PCB. Gluing alone will not re-establish the electrical connection needed for the immobilizer to read the transponder. “Soldered.” [Elektroda, tomasz0703, post #16908223]
Do I need to reprogram the car after replacing only the coil?
No. The coil is just an antenna for the transponder. When you replace or re-solder the coil, the immobilizer pairing remains unchanged, so no additional programming is required. “This coil is just an antenna.” [Elektroda, robokop, post #16908287]
How can I test if my immobilizer coil is bad?
Measure its resistance with a multimeter. A healthy coil shows finite resistance. Infinite resistance indicates an open winding, meaning the coil is broken. In that case, replace it or transplant a coil from a similar remote. [Elektroda, Strumien swiadomosci swia, post #16908235]
My coil has no visible leads—how do I proceed?
The leads terminate at the PCB pads. If the pads or clamping areas lifted when the coil was peeled off, repair requires precise micro-soldering or a donor board. If pads remain intact, a skilled tech can reattach a donor coil to those pads. [Elektroda, dbs123, post #16908256]
Can the coil come from any remote, or must it be Vectra C?
You can transplant a coil from another compatible remote. The key point is physical fit and proper soldering to the PCB pads. A technician can handle the swap quickly, restoring the antenna function without coding. [Elektroda, Strumien swiadomosci swia, post #16908267]
What’s the cheapest practical fix?
Transplant a donor coil and have a professional solder it. Buying a whole replacement key often costs around 100–200 PLN, but a solder-only repair is usually less. Ask a key service for a coil swap quote. [Elektroda, dbs123, post #16910901]
Is the remote-locking antenna the same as the immobilizer coil?
No. The immobilizer uses a discrete coil antenna on the PCB. The central-locking RF antenna is a printed trace on the board. Fixing the coil restores immobilizer start, not remote range. [Elektroda, grzesiekw12, post #16911637]
How do I safely swap an immobilizer coil?
- Desolder the damaged coil and clean the PCB pads.
- Align the donor coil leads with the pads; tack-solder one pad, then the other.
- Verify continuity and reassemble the key shell before testing in the ignition. [Elektroda, SQ9MEM, post #16908254]
Do I have to buy a whole key or can I reuse parts?
You can buy the cheapest compatible key and transfer your working layout or components to it. This avoids coding when your transponder electronics are intact. It’s a straightforward parts swap for a competent tech. [Elektroda, CAR pass, post #16911205]
Where can I find a replacement coil quickly?
Search marketplaces using terms like “Opel coil.” There are many listings for immobilizer coils compatible with Opel keys. Verify lead style and dimensions match your PCB pads before purchase. [Elektroda, grzesiekw12, post #16911637]
What if the PCB pads are torn off or damaged?
Pad damage complicates repair. A specialist may need to rebuild pads or run micro-jumpers. If damage is extensive, transferring your electronics to a donor board or shell can be faster and cheaper. [Elektroda, dbs123, post #16908256]
How much should I expect to pay for basic key work?
Some services quote 30–45 PLN for simple key-related tasks, but Vectra C parts and jobs are not in the ultra-cheap tier. Get a firm quote before proceeding, especially for micro-soldering. [Elektroda, Strumien swiadomosci swia, post #16911179]
Will a used key work if I only swap the coil?
Yes. The immobilizer pairing stays with your transponder electronics, not the coil. Move only the coil and keep your original electronics. No coding will be needed after a correct solder job. [Elektroda, robokop, post #16908287]
Someone said the coil needs parameters—what should I match?
Match physical fit and connection style first. Community guidance favors buying a cheap compatible key and transplanting the coil rather than chasing standalone specs. A technician can confirm suitability during the swap. [Elektroda, Strumien swiadomosci swia, post #16910864]
