How can our Peugeot 407's satnav be optimised for UK postcodes?

I own a Peugeot 407 with a built-in satnav. This is of very little use because even if you enter the full postal address it refuses to accept the last two letters of the postcode. I've written to Peugeot twice regarding this problem, but they say the satnav is optimised for continental Europe and nothing can be done. The chip in the system is a Harman Becker Europe Edition.10. Can you please give any advice on how to obtain a Great Britain chip that won't leave us in the wilds of Lancashire or Cumbria?

Asked on 16 June 2012 by PB, Kenilworth

Answered by Honest John
This is often the case because the UK and Japan are apparently then only counties in the world with seven digit postcodes. Other countries are less precise, so it's not a simple matter to upgrade the software because that would mean making something built to be less precise more precise.
Tags: sat nav
Similar questions
My Peugeot 406 HD90, now 5 years old is fitted with factory satnav. I have not used it a great deal locally but now, about to go away, I find it unreadable. The main dealer states that it has to be returned...
What is the most accurate speed indicator - analogue speedometer, digital speedometer or GPS on sat navs?
My satnav no longer picks up traffic, roadworks etc. VW tells me it is no longer supporting its own satnav. Is that genuinely true?
Related models
Good, sharp steering and handling. Excellent 2.2 173PS diesel engine.
 

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer