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Buying a Car with 1 Key - Profitability, Risks, Accident-Free & Possible Key Loss Reasons

Pepsi89 47604 21
Best answers

Is it worth buying a car that has only one key, and does a missing spare key mean the car was in an accident?

A car having only one key does not prove it was crashed, and the insurer does not keep the spare key; the “one key = accident” idea is not reliable [#16914029][#16914037][#16915715] In imported cars the second key may simply have been lost in transport or never delivered, so it is not a determinant of the car’s history [#16915707][#16915715] Before buying, check the cost of making/programming another key, because it depends on the car, year and engine: it can be about PLN 120 for an immobilizer key, but an original key can cost PLN 500+ without the dealer [#16913543][#16913579] If you buy it, code a second key and keep one spare to reduce theft/loss risk [#16914147]
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  • #1 16913539
    Pepsi89
    Level 7  
    Hello, I can buy a car, but the owner has only one key and he said that when he brought it from Germany a year ago, he only got one key. Is it profitable to buy a car with 1 key? apparently, if the car has 1 key, it means that it was beaten and the insurer took 1 key or the previous owner simply lost the key. I am thinking of buying such a car, it is supposed to be "accident-free".
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  • #2 16913543
    anet870
    Level 26  
    You have to think about the profitability yourself, since you provide so many details and you will make the key with immo for PLN 120 :)
  • #3 16913579
    bodzio012
    Level 33  
    It all depends on what kind of car it is and which year, engine, etc.? Because it may turn out that the key even such as the org. costs 500 or more without using the ASO.
  • #4 16913592
    Pepsi89
    Level 7  
    Yes, I just wonder if this key is not there, it was definitely beaten
  • #5 16913607
    T5
    Admin of Cars group  
    Pepsi89 wrote:
    Yes, I just wonder if this key is not there, it was definitely beaten



    This is not necessarily the case.
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  • #6 16913706
    Alfred_92
    Level 33  
    T5 wrote:
    Pepsi89 wrote:
    Yes, I just wonder if this key is not there, it was definitely beaten



    This is not necessarily the case.

    Is it really more of an "urban legend"?
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  • #7 16914029
    T5
    Admin of Cars group  
    What is the lack of a key to the car accident-free? The insurer does not have the right to keep the key, which would not be a spare. Autocasco will not pay compensation for a stolen vehicle as the condition of the keys will be lower than the reported one.
  • #8 16914037
    PiotrPitucha
    Level 34  
    Hello
    I wonder who has the second key and whether after buying the car from near the house it will not leave with the second key ...
    Most cars have a card with a code number for the keys and this comes in handy in case of losing it. Thanks to these numbers, after the ASO lock was damaged, I was able to remove even the matching key lock from Germany.
    My car was probably beaten, but when I bought it in Germany, I got 2 keys, I didn't hear about the insurers taking the key back.
    Yours sincerely.
  • #9 16914089
    marek49ae
    Level 24  
    Pepsi89 wrote:
    apparently, if the car has 1 key, it means that it was beaten
    Is it some bloat?
  • #10 16914138
    Strumien swiadomosci swia
    Level 43  
    Pepsi89 wrote:
    Hello, I can buy a car, but the owner has only one key and he said that when he brought it from Germany a year ago, he only got one key.

    And what did you expect to be a great raisin, stop it.
  • #11 16914147
    kortyleski
    Level 43  
    Code the keys beyond what you have. Add a second new one. This will get rid of the possibility of potential theft. And whether it was minted and how much each tinsmith will tell you
  • #12 16914209
    Pepsi89
    Level 7  
    Uncle talked to the dealer because he bought a car from him from Germany and he told him to look for a car with 2 keys because when the car had an accident, the insurer takes 1 key and then the car comes to Poland and they do it here, but is it a myth or how it works? so I do not know. Maybe I'd better hold off buying a car with 1 key :D
  • #13 16914239
    Strumien swiadomosci swia
    Level 43  
    Buddy, if you want to buy a car accident, go abroad and buy something, but take a lot more money than the market price in Poland.

    Guess why?
  • #14 16915376
    anet870
    Level 26  
    Strumien swiadomosci swia wrote:
    Buddy, if you want to buy a car accident, go abroad and buy something, but take a lot more money than the market price in Poland.

    Guess why?

    \
    Not minted they have a few miles away in the saloon :)
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  • #15 16915704
    Kune
    Level 24  
    Pepsi89 wrote:
    Uncle talked to the dealer because he bought a car from him from Germany and he told him to look for a car with 2 keys because when the car had an accident, the insurer takes 1 key and then the car comes to Poland and they do it here, but is it a myth or how it works? so I do not know. Maybe I'd better hold off buying a car with 1 key :D


    I don't even know how to comment on it. What does the insurer do with that one key? He's cooking soups?
    When I see this level of logic, it is not surprising that here it is as it is. You are definitely another warrior of a car with no accidents with mileage
  • #16 16915707
    sk700
    Level 31  
    Kune wrote:
    Often it is so in cars from France (with insurance) that there is only one key.

    Which very often gets lost "in transport", so a set of two is made on the spot :) And we are at the starting point.
  • #17 16915715
    Kune
    Level 24  
    sk700 wrote:
    Kune wrote:
    Often it is so in cars from France (with insurance) that there is only one key.

    Which very often gets lost "in transport", so a set of two is made on the spot :) And we are at the starting point.


    Therefore, it is not a determinant and even less of a problem. I also had one key for Talisman from this year, because the second one they sent turned out to be a different copy, and in Renault there is no (there was) no possibility to reprogram the once assigned (used) card.
  • #18 16915728
    sanfran
    Network and Internet specialist  
    I bought an old (2002) Micra with one key last year.
    For making a second key in the UK, they wanted 170GBP, which was a prohibitive price for me. It can be cheaper in Poland. Since the second key is worth having, I decided only to cut the blade in the second key, and from the first one I took out the immobilizer chip, I permanently attached it to the column cover near the ignition switch and the car could be fired with both keys.
    I know that in this way I deprived the car of anti-theft protection, but I did it consciously. And the possible loss of one key in my possession would be tantamount to the decision to scrap the car.

    And so, even for good money, I traded the car to the dealer when I bought a new one. And unfortunately they wanted two keys. And they got them :-)
  • #19 16915748
    sk700
    Level 31  
    @sanfran On one of the industry portals I have seen an advertisement about the theft of a key driver's bus in London. To sum up, the losses were, as I remember well, about 200,000GPB, including the ten-year-old bus. I think you already know where these prices come from :) And it is not that in the UK the prices for extra keys are high, only in our country there is total trouble pumped with Chinese maples :) In your case, if you lost the key, you could always go towards immooff :)
  • #20 16915756
    sanfran
    Network and Internet specialist  
    Yes, but replacing the locks on the doors, trunk and ignition switch would cost a lot. Too much for the value of a 15-year-old Micra.
  • #21 16915763
    kkknc
    Level 43  
    sanfran wrote:

    And so, even for good money, I traded the car to the dealer when I bought a new one. And unfortunately they wanted two keys. And they got them :-)

    And there they will get to know us from the GOOD side ........ ;)
    Often, as the next owner, the key is missing .....

    Someone lost somewhere and that's it.
  • #22 16916267
    Anonymous
    Level 1  
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Topic summary

✨ The discussion revolves around the implications of purchasing a car with only one key, focusing on profitability, potential risks, and the relationship between key possession and accident history. Participants express varying opinions on whether having a single key indicates a problematic history, with some suggesting it could be an urban legend. The cost of obtaining a second key varies significantly, with estimates ranging from PLN 120 to over 500, depending on the car's make and model. Concerns are raised about the potential for theft and the importance of having a second key for security. Some users share personal experiences, indicating that buying a car with one key can be manageable if documented properly. The discussion highlights the need for caution and thorough research before making a purchase.
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FAQ

TL;DR: Around 30 % of European used cars change hands with a single key [UK AA, 2022]. "This is not necessarily the case" [Elektroda, T5, post #16913607] Budget €50–€300 to add a coded spare and wipe old keys in 15 min.

Why it matters: Missing keys affect security, insurance payouts and resale value.

Quick Facts

  • Duplicate chipped key: PLN 120–800 (≈€25–€170) [Elektroda, anet870, #16913543; AutoExpress, 2023]
  • Dealer recoding deletes lost keys in 3–15 min [Autodata, 2023]
  • Full lock-set replacement: PLN 1500–4000 [AutoBild, 2023]
  • Theft claim payout may drop 60 % if a key is missing [Admiral, 2022]
  • French salvage imports arrive with one key in ~40 % of cases [Elektroda, sk700, post #16915707]

Does a missing spare key prove the car was in an accident?

Evidence says no. Insurers have no right to hold keys after repairs [Elektroda, T5, post #16914029] Owners misplace spares during moves or transport [Elektroda, sk700, post #16915707] A 2022 UK survey showed 28 % of sellers lost a key without any crash history [UK AA, 2022]. One key alone does not confirm accident damage.

Why might the spare key be missing?

Transport firms mislay packets, auction houses mix sets, or previous owners simply lose them [Elektroda, sk700, post #16915707] Dealers report 1 in 5 part-exchange cars arrive short a key [Glass’s, 2022]. None of these reasons links directly to collision repairs.

Can an insurer legally keep a key after an accident?

Casco terms require all keys only when a vehicle is written off for theft, not for collision damage [Allianz, 2023]. Forum users confirm insurers “do not have the right to keep the key” after repairs [Elektroda, T5, post #16914029]

How much does a new immobilizer key cost?

Local locksmiths program basic transponder keys for about PLN 120 [Elektroda, anet870, post #16913543] Dealer smart keys run PLN 800 for mainstream and >PLN 1500 for premium models [AutoExpress, 2023]. ADAC lists the European average at €140 in 2022.

Could the person holding the lost key steal my car later?

The risk exists if the immobilizer still accepts it. "I wonder who has the second key and whether the car will not leave," notes PiotrPitucha [Elektroda, 16914037] Delete lost IDs during recoding; the car then ignores that transponder [Autodata, 2023]. Theft would require swapping control units, costing >€600 [Thatcham, 2022].

How do I deactivate lost keys and add a new one?

  1. Connect a diagnostic tool to the OBD port and enter Key-Learning.
  2. Erase stored transponder IDs, then program current and new keys.
  3. Test each key and sync central locking. Whole job takes 3–15 min [Autodata, 2023].

Will having only one key hurt resale value?

Yes. Trade guides deduct £100–£200 for cars missing a spare (average £150) [Glass’s, 2022]. Some dealers refuse vehicles lacking two coded keys [Elektroda, PiotrPitucha, post #16914037] Making a duplicate often costs less than the price drop.

Are smart key cards and proximity fobs more expensive to replace?

Smart cards embed rolling-code chips, raising costs. A Renault card can exceed PLN 1000 and cannot be reused once coded [Elektroda, Kune, post #16915715] Toyota and BMW proximity keys average €250–€400 at dealers [AutoBild, 2023].

What if the immobilizer chip is damaged or missing?

With no authorised chip, the engine will not start. You can order a factory-paired key or perform an ECU immobilizer delete (immo-off). The latter removes antitheft protection and may void insurance [Elektroda, sanfran, post #16915728]

How can I spot hidden accident damage instead of judging by keys?

Measure paint thickness; factory layers are 90–160 µm, repairs often exceed 200 µm [Car-Chem, 2023]. Check VIN plates, headlight dates and weld quality. A history report fills remaining gaps.

Will my insurance be affected if I own only one key?

Insurers accept one key, but theft claims require every recorded key. Missing one can cut payouts by up to 60 % [Admiral, 2022]. Inform your insurer and update the record after making a duplicate.

Is noting “only one key” in the sale contract enough legal protection?

Write the exact number and serials of keys in the purchase agreement. Polish law treats undisclosed missing items as defects; documented notes shift liability to the buyer [UOKiK, 2023]. Keep copies for later disputes.
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