BX Parts For Sale/Wanted

5303 topics

Page 5 of 107
- Jump to page:
Previous
1
…
3
4
5
6
7
…
107
Next

Most liked posts	Author	Posted	Liked	Forum
Wanted - BX GT wheel trim set	Jugostran	Mon Nov 13, 2023 10:16 pm	2 times in total	BX Parts For Sale/Wanted
Estate Towbar Wanted	panky	Tue Sep 12, 2023 10:35 am	2 times this year	BX Parts For Sale/Wanted

Topics

Replies

Views

Last post

Box of gti bits f/s

Last post by rutter123 « Sun Jun 23, 2019 7:17 pm
Replies: 1
by rutter123 » Mon Jun 10, 2019 4:00 pm

First post

Suitable for gti8v with Jetronic ignition
Taken from my old gti all these components were changed as a matter of course
All usable and in good order...

Last post

Sold.

1 Replies

824 Views

Last post by rutter123
Sun Jun 23, 2019 7:17 pm
BX wheel trims & a BX HATCH PARCEL SHELF black

Last post by john baguley « Tue Jun 11, 2019 7:37 pm

by john baguley » Tue Jun 11, 2019 7:37 pm

I need a set of wheel trims & black parcel shelf in black. 07801525879
Cheers John

0 Replies

2755 Views

Last post by john baguley
Tue Jun 11, 2019 7:37 pm
oil back

Last post by Kaapelimies « Sat May 18, 2019 8:05 pm
Replies: 4
by barry badger » Sat May 18, 2019 1:01 am

First post

Just after my txd dropping its lhm all over the road my 4x4 decided to join in too. The front oil back harness has split. I'm having trouble getting...

Last post

Hello. I substituted my 4x4's octopus with a standard one, I don't know what model it was from, but all I needed to do was lengthen the returns from...

4 Replies

1186 Views

Last post by Kaapelimies
Sat May 18, 2019 8:05 pm
XUD Engine Wanted

Last post by JayW « Wed May 01, 2019 7:04 am
Replies: 5
by JayW » Tue Apr 30, 2019 4:16 pm

First post

Urgently in need of a complete n/a XUD9 (1.9 NON-turbo) engine. Preferably Bosch if possible.

Mine has just gone with style and it's my only motor....

Last post

T/d lump c/w gearbox???
You know you want to...

I do, but it's just not practical when I have to turn it around literally overnight!

5 Replies

3487 Views

Last post by JayW
Wed May 01, 2019 7:04 am
Wanted: 8v GTi exhaust manifold

Last post by Kaapelimies « Sat Apr 27, 2019 7:14 pm
Replies: 5
by deltic » Thu Apr 18, 2019 10:14 pm

First post

Possibly a long shot but has anyone got one in good condition?

Thanks, Jonathan

Last post

Have you made a comparison on Xantia's manifold, do they fit? They don't seem to crack for some reason..

5 Replies

1346 Views

Last post by Kaapelimies
Sat Apr 27, 2019 7:14 pm
Shims for rear trailing arm

Last post by Kaapelimies « Thu Apr 11, 2019 6:27 pm
Replies: 3
by frenchy » Wed Apr 10, 2019 9:48 pm

First post

Know these are nla but hoping just the same, looking for the shims to be used when replacing rear trailing arm bearings.

Have tried Rob Moss, Doug...

Last post

I have measured the needed distances, and always the endfloat has been good _without_ the original shim, when using all new parts, including...

3 Replies

1155 Views

Last post by Kaapelimies
Thu Apr 11, 2019 6:27 pm
For sale

Last post by rutter123 « Tue Apr 09, 2019 3:42 pm

by rutter123 » Tue Apr 09, 2019 3:42 pm

TD RADIATOR (IPRA) £50 good condition
TD exhaust downpipe £40 good condition

0 Replies

2888 Views

Last post by rutter123
Tue Apr 09, 2019 3:42 pm
Wanted - Isle of Man

Last post by tzd-92 « Sun Apr 07, 2019 12:39 pm

by tzd-92 » Sun Apr 07, 2019 12:39 pm

Bit of a long shot here but I was wondering if anyone has or knows of any BX's for sale on the Isle of Man? I've recently moved to the island and am...

0 Replies

2836 Views

Last post by tzd-92
Sun Apr 07, 2019 12:39 pm
Wheel Trims/Hub Caps for sale. Diam39cm/15.5inches

Last post by Tim Leech « Thu Apr 04, 2019 10:01 am
Replies: 4
by peterwight » Sun Mar 31, 2019 4:54 pm

First post

For Sale to whoever makes the best offer, although I'd like £40. a set of four Citroen (completer with chevrons) wheel covers, vintage 1992. A little...

Last post

May have been fitted to other models but I only recall seeing them on Saxos

4 Replies

1318 Views

Last post by Tim Leech
Thu Apr 04, 2019 10:01 am
For sale, 2 new and unused tyres, 175R14

Last post by peterwight « Sat Mar 30, 2019 5:01 pm

by peterwight » Sat Mar 30, 2019 5:01 pm

When I still owned a BX, I bought two tyres for it anticipating the need thereof. Now I'm left with two brand new 45 quid tyres, fitted on steel...

0 Replies

2789 Views

Last post by peterwight
Sat Mar 30, 2019 5:01 pm
Bx parts?

Last post by lesg « Sat Mar 30, 2019 4:30 pm

by lesg » Sat Mar 30, 2019 4:30 pm

I have some new old stock Citroen parts for sale, not sure what they fit but have the code numbers from the packaging. If anyone could enlighten me...

0 Replies

2819 Views

Last post by lesg
Sat Mar 30, 2019 4:30 pm
Heads Up: '91 diesel auto BX in U-Pull-It York

Last post by vulgalour « Tue Mar 26, 2019 1:44 am
Replies: 4
by greenstuff » Tue Mar 19, 2019 6:49 pm

First post

Still largely complete - all the mechanicals are intact as of today.

Just thought I'd pass on the word as it's not often a BX turns up in any...

Last post

Apparently quite rotten. Someone more local to it than I was kind enough to grab a couple of interior bits for me.

4 Replies

1247 Views

Last post by vulgalour
Tue Mar 26, 2019 1:44 am
Front Drop Links

Last post by Tinkley « Tue Mar 19, 2019 10:48 pm
Replies: 4
by Sean20 » Sat Mar 16, 2019 5:32 pm

First post

Hi
where could i find a set of Front Drop Links can't seem to find them anywhere

thanks

Last post

Try Eurocarparts too, who should have the First Line Brand ones which are OK. Try a googly for the First Line ones as well, well priced and I've...

4 Replies

4755 Views

Last post by Tinkley
Tue Mar 19, 2019 10:48 pm
Wanted FDV and badges

Last post by Patch12 « Tue Mar 19, 2019 11:35 am
Replies: 10
by Patch12 » Tue Jan 29, 2019 3:01 pm

First post

Hi am after a good FDV or kit to reseal kit,believe part number is 95669034 and rear badges BX17 TZD TURBO & CITROEN that go on the tailgate.Mines a...

Last post

All sorted now!

10 Replies

1961 Views

Last post by Patch12
Tue Mar 19, 2019 11:35 am
Wanted Front and Rear Carpet

Last post by Sean20 « Fri Mar 15, 2019 11:50 am
Replies: 5
by Sean20 » Wed Feb 27, 2019 9:23 pm

First post

Wanted Front and Rear Carpet in Grey or Black

Thanks

Last post

I have some carpets if still needed

Fronts

How much please

5 Replies

1420 Views

Last post by Sean20
Fri Mar 15, 2019 11:50 am
WANTED:- BX heater tap

Last post by BX 14 GT « Wed Mar 13, 2019 5:53 am
Replies: 1
by Dyane425 » Mon Jun 11, 2018 3:42 pm

First post

BX heater tap for BX Diesel Non turbo
It is bolted to the heater matrix assembly, and has 2 tubes which go through the bulkhead and are attached to...

Last post

Hi,

are you still searching for this part? I've got one to offer you, if still needed.

Greetings
Alex

1 Replies

1117 Views

Last post by BX 14 GT
Wed Mar 13, 2019 5:53 am
wanted

Last post by rutter123 « Tue Mar 12, 2019 12:51 pm
Replies: 11
by rutter123 » Mon Feb 04, 2019 7:12 pm

First post

Rear seatbelt anchor bolt (the one under back seat) just one bolt that's all
Thanx

Last post

Thanx for that

11 Replies

2061 Views

Last post by rutter123
Tue Mar 12, 2019 12:51 pm
BX Stuff for Sale

Last post by TizzyD « Wed Mar 06, 2019 1:44 pm
Replies: 28
by saintjamesy89 » Mon Feb 12, 2018 10:31 am
1

2
First post

Hi All,

I'm clearing out the GT's garage and have some things for sale, all funds will go in the 'GT Improvement Pot'.

A pair of BX steel wheels...

Last post

Tom if you have a drivers front door seal in the stack of goodies please let me know :D
28 Replies

6785 Views

Last post by TizzyD
Wed Mar 06, 2019 1:44 pm
Wanted project

Last post by Lampro « Sat Mar 02, 2019 10:14 am
Replies: 4
by Lampro » Fri Feb 08, 2019 6:35 pm

First post

Hi everyone loved these cars since I was a teenager, I now have the time to be able to own one is anyone selling a reasonably priced project car for...

Last post

Hi Peter I have sent u a message welding isn't a problem so sounds like something I could get my teeth into

4 Replies

1422 Views

Last post by Lampro
Sat Mar 02, 2019 10:14 am
Sale

Last post by rutter123 « Sat Mar 02, 2019 7:27 am
Replies: 2
by rutter123 » Wed Feb 27, 2019 11:01 pm

First post

Diesel starter motors 1.7/1.9 & turbo £20 each
Lucas/CAV fuel pump £40
Turbo diesel 5sp gearbox £50 each
Front struts £30 each
Non ABS rear...

Last post

South Lincs near Spalding

2 Replies

1733 Views

Last post by rutter123
Sat Mar 02, 2019 7:27 am
16V front bumper FOR SALE

Last post by peterwight « Fri Mar 01, 2019 7:59 pm
Replies: 5
by peterwight » Sun Nov 25, 2018 10:56 am

First post

More photos are available on request. Please contact me if you are at all interested in my Mark2 valver bumper. They're extremely rare so you would...

Last post

Please note this has been sold. Thank you for interest shown. PW

5 Replies

1602 Views

Last post by peterwight
Fri Mar 01, 2019 7:59 pm
Wanted

Last post by rutter123 « Wed Feb 27, 2019 10:20 pm
Replies: 5
by Sean20 » Mon Jan 28, 2019 8:46 pm

First post

Hi,

i'm looking for a rear plastic bumper bracket what keeps the side of the bumper up not sure of the name the one in the photo passenger side...

Last post

P.m'd

5 Replies

1420 Views

Last post by rutter123
Wed Feb 27, 2019 10:20 pm
bx front fog light

Last post by Defender110 « Tue Feb 26, 2019 9:45 am
Replies: 1
by lesg » Mon Feb 25, 2019 10:08 pm

Wanted. Has anybody got a front foglight bulb holder, the plastic piece that the bulb fits into as I broke mine on trying to fit a new bulb or a...

1 Replies

1184 Views

Last post by Defender110
Tue Feb 26, 2019 9:45 am
Radiator f.s

Last post by rutter123 « Mon Feb 25, 2019 8:55 am

by rutter123 » Mon Feb 25, 2019 8:55 am

Good used rad for petrol 1.6/1.9/gti8v will also fit 1.9 non turbo diesel, side header tank type, not suitable for models with remote header tank....

0 Replies

2677 Views

Last post by rutter123
Mon Feb 25, 2019 8:55 am
Bx front bumper

Last post by Mike P « Fri Feb 22, 2019 9:11 pm
Replies: 5
by Iansharp » Wed Feb 06, 2019 7:15 pm

First post

Bx front bumper for sale as new never been fitted £150 buyer to collect as to large to post Bournemouth dorset 20190206_124505.jpg

Last post

No, it's sold.

5 Replies

1434 Views

Last post by Mike P
Fri Feb 22, 2019 9:11 pm
Wheel Bolts 16 bolts for alloy wheel + 4 bolts for steel wheel

Last post by sdelasal « Sat Feb 09, 2019 7:39 pm

by sdelasal » Sat Feb 09, 2019 7:39 pm

I have the following ..

- 16 for alloy wheels - flat type
- 4 for steel wheels - tapered type.

£15 inc postage for the lot.

0 Replies

2840 Views

Last post by sdelasal
Sat Feb 09, 2019 7:39 pm
Radio cd/cassette player

Last post by jamescarruthers « Tue Feb 05, 2019 8:22 pm
Replies: 2
by Meter rat » Tue Feb 05, 2019 5:26 pm

First post

Looking for a working 1990’s CD player or a cassette player, if nothing suitable cd wise. My one is eating self from the inside out, and modern ones...

Last post

I might have the original Clarion knocking about from my old BX. It's yours if you want it? No idea if it works, it was pretty rubbish when...

2 Replies

856 Views

Last post by jamescarruthers
Tue Feb 05, 2019 8:22 pm
Bx diesel gearbox

Last post by Jaba « Thu Jan 24, 2019 11:04 pm
Replies: 2
by Cromerbrian » Tue Jan 22, 2019 1:54 am

First post

I presume these have a higher final ratio than my gti ,if so I need one cheers brian

Last post

Actually the TD 5th gear swap in works best on the 16v GTi as its a bit too high for the 8v GTi. For an 8v GTi you need 5th gears from a 16 or 19...

2 Replies

953 Views

Last post by Jaba
Thu Jan 24, 2019 11:04 pm
pump tensioner pulley

Last post by Jaba « Wed Jan 16, 2019 5:56 pm
Replies: 5
by lesg » Tue Jan 15, 2019 5:35 pm

First post

Hi there, has anyone got a hydraulic pump tensioner pulley wheel for a Mk1 GT as mine has a squeal and the garage say that it is the wheel bearing...

Last post

Look again, 'V' belt drive pulley although it does appear to be the opposite way round from this one also listed for 1.9 gt:

That one is for...

5 Replies

1611 Views

Last post by Jaba
Wed Jan 16, 2019 5:56 pm
BX Diesel Wanted

Last post by Defender110 « Tue Jan 15, 2019 11:45 am
Replies: 22
by Patch12 » Wed Dec 19, 2018 4:59 pm
1

2
First post

Hi to all out there still after a BX Diesel hatch as a project needing work/to use over the winter,will go to a good home,am looking to spend 100-200...

Last post

Pictures then? ;-)
22 Replies

5985 Views

Last post by Defender110
Tue Jan 15, 2019 11:45 am
WANTED PLASTIC REAR QUARTER WINDOW

Last post by rutter123 « Mon Jan 14, 2019 7:31 pm
Replies: 1
by Sean20 » Mon Jan 14, 2019 4:28 pm

First post

WANTED PLASTIC REAR QUARTER WINDOW FOR A BX DTR 1986 DRIVERS SIDE UK

Last post

Chevronics keep some in stock new £90 also s/h £40

1 Replies

666 Views

Last post by rutter123
Mon Jan 14, 2019 7:31 pm
BX project

Last post by Lampro « Sun Jan 13, 2019 7:33 pm

by Lampro » Sun Jan 13, 2019 7:33 pm

Hi I have always wanted a bx since a teenager if there is anyone selling a project car ie none runner needs work no mot let me know anything to get...

0 Replies

2590 Views

Last post by Lampro
Sun Jan 13, 2019 7:33 pm
WANTED...ABS Sensor.

Last post by rutter123 « Tue Jan 08, 2019 7:11 pm
Replies: 5
by Photeauart » Sun Jan 06, 2019 12:47 pm

First post

Forgive the shout out but still trying to source a rear drivers side ABS sensor for my BX19 TZi estate. Anybody have one or any clues. Cheers., Phil

Last post

I've just been out to have a look good news is its ok showing around 1030ohms bad news is its oon a passenger side arm, I'm not prepared to try and...

5 Replies

1091 Views

Last post by rutter123
Tue Jan 08, 2019 7:11 pm
Diesel fuel tank wanted

Last post by Jaba « Sun Dec 30, 2018 10:36 pm
Replies: 2
by rutter123 » Sun Dec 30, 2018 5:01 pm

First post

Main fuel tank for a turbo diesel hatch wanted Just the tank nowt else, can prob collect/remove, if they are the same as petrol car then that will do...

Last post

Wow, stroke of luck, one on eBay for £20,

A lucky BX result to end 2018 with !

2 Replies

756 Views

Last post by Jaba
Sun Dec 30, 2018 10:36 pm
Wheels

Last post by rutter123 « Sun Dec 23, 2018 7:22 pm
Replies: 1
by Meter rat » Sat Dec 22, 2018 2:40 pm

First post

Can anyone help with a pair of 14inch steel wheels? I need a pair with the slots in to refurbish. Or a set of alloys? Suggestions as what other...

Last post

4x108's are the size, plenty of choice on the s/h market, french cars from the same era, check the wheel centre will clear the hub shank, not too...

1 Replies

813 Views

Last post by rutter123
Sun Dec 23, 2018 7:22 pm
BX metal fuel line wanted please (BX 16v mk1)

Last post by Kitch « Fri Dec 21, 2018 10:02 am
Replies: 18
by mac1776 » Fri Dec 07, 2018 12:27 pm
1

2
First post

Hi All,
My current ex metal fuel lines have completely rooted out, does anyone have a spare set for sale please?
I can get new ones from Chevronics...

Last post

I buy it in 8mm lengths all the time

There's a high chance of leaks with a joint every 8mm! :D

:rofl: :rofl: :rofl: :rofl:

:lol:

Costs a...
18 Replies

5400 Views

Last post by Kitch
Fri Dec 21, 2018 10:02 am
For sale: a pair of/2 brand new old stock BX brown tweed headrest cussions

Last post by Tim Leech « Thu Dec 06, 2018 10:02 am
Replies: 3
by BX 14 GT » Tue Dec 04, 2018 3:51 pm

First post

Hi at all,

I've got in the topic mentioned BX parts for sale.

I thought in 25£plus shipping to UK.

Regards
Alex

Last post

Your probably right, I remember seeing a GT a few years ago like this but that's now in a private collection so doubtful we will see it.

3 Replies

1002 Views

Last post by Tim Leech
Thu Dec 06, 2018 10:02 am
WANTED. pram handle spoiler for 1991 bx

Last post by mountainmanUK « Mon Dec 03, 2018 7:19 pm
Replies: 4
by arlever » Sat Dec 01, 2018 5:50 pm

First post

Anyone got a spoiler they are selling please ?

Last post

Looks OK, and has all the fitting bolts! The price seeems reasonably cheap too! Any use?

4 Replies

1129 Views

Last post by mountainmanUK
Mon Dec 03, 2018 7:19 pm
For sale, Reg plates BXI 19

Last post by Jaba « Fri Nov 30, 2018 8:36 am
Replies: 2
by peterwight » Thu Nov 29, 2018 1:58 pm

First post

If you have a 1.9 BX with injectors this is the most apt number imaginable! Yes I know I can put it on my Meteor, but there might be one of you out...

Last post

NOW SOLD. Ought to have asked for more money! Sorry if I've excited interest and nipped it in the bud. Yours sincerely, PW

Its not too late to...

2 Replies

864 Views

Last post by Jaba
Fri Nov 30, 2018 8:36 am
Wanted 19v or 8v Gt

Last post by Tim Leech « Thu Nov 29, 2018 4:49 pm
Replies: 6
by Roymck » Mon Sep 03, 2018 8:32 pm

First post

Don’t suppose anybody has a nice 8v or even 16v Gti for sale but must have aircon fitted . Thanks

Last post

And to be honest the chance of finding one that has it actually working is even harder, I have had a couple in the past and they never worked.

6 Replies

1838 Views

Last post by Tim Leech
Thu Nov 29, 2018 4:49 pm
Octopus wanted for Meteor

Last post by Tim Leech « Thu Nov 29, 2018 4:32 pm
Replies: 6
by peterwight » Tue Sep 25, 2018 1:29 pm

First post

Please search your unwanted kit for this multi~limbed junction box/return valve in the BX hydraulic sysrem. My Meteor has sprung a leak, and I'm...

Last post

Citroen ran out last year I think hence why Rob had them remade.

6 Replies

1802 Views

Last post by Tim Leech
Thu Nov 29, 2018 4:32 pm
A pillar

Last post by Kitch « Tue Nov 27, 2018 9:36 am
Replies: 2
by Binx » Mon Nov 26, 2018 8:36 pm

First post

Hi I need an A pillar for 1986 mk1 Hatchback BX,

Anyone have one or know where I can get one?

I have someone lined up someone to repair rust...

Last post

Or just make repair sections. That's what I did.

2 Replies

989 Views

Last post by Kitch
Tue Nov 27, 2018 9:36 am
For sale

Last post by Jaba « Fri Nov 16, 2018 8:22 pm
Replies: 31
by rutter123 » Sun Jan 14, 2018 10:17 am
1

2

3
First post

Gti 8v radiator (will also fit 16petrol and 19d n/a) £30
T/D exhaust downpipe £30
T/D radiator £40
T/D Lucas pump and brackets with pipes £35
T/D...

Last post

Rutter123: PM sent re parts availability.
31 Replies

7256 Views

Last post by Jaba
Fri Nov 16, 2018 8:22 pm
Free parts near Edinburgh

Last post by SinTiger « Wed Nov 14, 2018 11:59 pm
Replies: 1
by davyj6666 » Sat Sep 22, 2018 11:51 am

First post

I have a collection of about 5 medium size boxes of BX parts, including spheres, cylinder head, engine parts. All for free I'm having a clearout as I...

Last post

Hi, do you still have some parts? I'm in Ayrshire.

1 Replies

793 Views

Last post by SinTiger
Wed Nov 14, 2018 11:59 pm
Steering wheel boss

Last post by Fortisskylark « Wed Nov 07, 2018 2:17 am

by Fortisskylark » Wed Nov 07, 2018 2:17 am

Does anyone have one to fit a momo steering wheel to a 1992 bx?

Thanks

0 Replies

2517 Views

Last post by Fortisskylark
Wed Nov 07, 2018 2:17 am
For sale Turbo diesel gearbox

Last post by rutter123 « Tue Oct 30, 2018 8:34 pm
Replies: 4
by rutter123 » Mon Apr 16, 2018 7:25 pm

First post

BE3 5 speed removed from a 91 car with 81000 miles, good box no issues, ideal for GTi 5th gear conversion
£50
Collection from PE12...

Last post

Hi Brian £50 if you want one. Not sure about delivery it's a bit too heavy for the regular parcel companies, you're welcome to come collect it I'm...

4 Replies

1385 Views

Last post by rutter123
Tue Oct 30, 2018 8:34 pm
Diesel gearbox

Last post by Cromerbrian « Sun Oct 28, 2018 11:27 am

by Cromerbrian » Sun Oct 28, 2018 11:27 am

Hi any one got one for sale or know where I can get one please

0 Replies

2501 Views

Last post by Cromerbrian
Sun Oct 28, 2018 11:27 am
Wanted Solex autochoke or cam retaining nut

Last post by AdrianO « Tue Oct 16, 2018 9:56 pm
Replies: 4
by AdrianO » Wed Oct 10, 2018 4:40 pm

First post

Are there any Solex autochokes out there post replacement with a manual choke?

I am in need specifically of the securing nut in the centre of the...

Last post

Thnx all for chipping in. An update, now I have the BX back. The back story was Solex carb choke reassembled wrong? (with pics) .

Retaining nut...

4 Replies

1385 Views

Last post by AdrianO
Tue Oct 16, 2018 9:56 pm
wanted hydraulic pump

Last post by womble3go « Fri Oct 05, 2018 6:41 pm
Replies: 1
by lesg » Fri Oct 05, 2018 4:32 pm

First post

Hi there, has anyone got a working Hydraulic Pump for sale for a 1.9 Gt as mine needs replacing. If you have please let me know how much you would...

Last post

PM you

1 Replies

733 Views

Last post by womble3go
Fri Oct 05, 2018 6:41 pm
Values on 16v

Last post by Kitch « Mon Oct 01, 2018 4:33 pm
Replies: 1
by Aarborel » Wed Sep 26, 2018 5:30 pm

First post

Hello all,

I looking to buy a BX 16v which requires a little work, it has an MOT but needs heater blower fixing, leaking front strut, key is broken...

Last post

Too many other variables involved to affect the value. Rust, for a start. Mileage is relatively low, but history, originality, rust, engine...

1 Replies

917 Views

Last post by Kitch
Mon Oct 01, 2018 4:33 pm

New Topic

5303 topics

Page 5 of 107
- Jump to page:
Previous
1
…
3
4
5
6
7
…
107
Next

Return to Board Index

Forum permissions

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum