Hi, I’m hoping someone might be able to give me some advice about which rear springs are best for my 2011 Octavia 1.2 TSI estate?

I’ve had the car for a few months and generally it’s been great, but if I have passengers in the back the bottom scrapes going over speed bumps.

I read on this forum that after 2007 Octavia estates were fitted with softer springs, I’m wondering whether it might worth getting slightly stiffer than the current ones. I’m being told that the correct like for like replacement is part number 1K0 511 115 BD. But I don’t want to replace them (I’ll also be replacing the shock absorbers) and find that it still scrapes over bumps. Would I be better off getting 1K0 511 115 BE/F springs ? Or would the BD springs with new shock absorbers likely solve the problem? Any advice appreciated

I fitted KYB shocks and springs on mine. Think I went for heavy duty/bad road version of springs as I carry a fair weight. So far excellent and car sits pretty level even when fully loaded. From memory there are different ones depending if you have sports suspension/estate etc. Look for 12.5mm thickness and the HD ones are a bit longer if I remember. Mine is a 08 1.9tdi

Alasdair

Heres a link to KYB europe. https://kyb-europe.com/catalogue/

Alasdair

Thanks for your help, is your car an estate? I basically just want to be able to carry passengers without scraping on speed bumps. I’m not often carrying really heavy loads and I’m not towing . Having read this thread https://www.briskoda.net/forums/topic/500864-mk-ii-octy-estate-variable-rate-springs-other-than-bilstein/page/2/#findComment-5656174

it seems like I might want to ignore the 1K0 511 115 BD and get something stiffer? But I’m also reading in this thread https://www.briskoda.net/forums/topic/500864-mk-ii-octy-estate-variable-rate-springs-other-than-bilstein/#findComment-5655975

that the 1K0 511 115 BG is too hard! I found this on eBay which is listed as replacement for 1K0 511 115 BE and 1K0 511 115 BF https://ebay.us/m/CNfvMN . Maybe would be a good middle ground ?

Yes mines an estate and was used to carry heavy loads so needed heavy duty springs. With the old springs it didnt hit speed bumps but sat pretty low in back fully loaded. Car was a bit hard suspension wise when empty so maybe as you said go for middle ground for a bit more comfort. It could be that the springs on yours have weakened over time.

Alasdair

Have a look at https://www.partsinmotion.co.uk/ They are pretty good on prices. They list two NAPA springs. (as well as loads of others) The H duty NCS1855 are thicker and shorter at £24.59 each and Standard ones NCS1140 are only £18.75 each so might be worth a go. Been using them for years and delivery is pretty fast as well.

Alasdair

Check the condition of rear shocks as well. Normally they wont affect ride height but if they are completely gone then over time can weaken springs and I found when I replaced gas filled ones on one of my very bouncy cars the ride height was slightly higher. There was no sign of leaking but when I removed them they werent doing much in the way of shock absorbing.

13 minutes ago, Alasdair1 said:

Have a look at https://www.partsinmotion.co.uk/ They are pretty good on prices. They list two NAPA springs. (as well as loads of others) The H duty NCS1855 are thicker and shorter at £24.59 each and Standard ones NCS1140 are only £18.75 each so might be worth a go. Been using them for years and delivery is pretty fast as well.

Alasdair

Cheers, had a quick look and the ones that come up when I put my reg in on that site (including the ones you mentioned NCS1140 £18.75) seem to be part number 1K0511115BG. It’s confusing because other sites have recommended 1K0511115BD - which if I’m understanding the last letter codes correctly is 3 levels softer than BG. I suppose I should take the wheel off and see if I can see the colour code of the current springs…

Yep its very confusing. Might be a PR code in boot that relates to springs fitted. Hopefully there is still enough coloured paint left for you to check. Mine had no paint on whatsoever. If the car is bottoming out over speedbumps it may be that they have become weak or as said shocks have had it leading to weakend springs.

Alasdair

Alasdair

4 minutes ago, Alasdair1 said:

Check the condition of rear shocks as well. Normally they wont affect ride height but if they are completely gone then over time can weaken springs and I found when I replaced gas filled ones on one of my very bouncy cars the ride height was slightly higher. There was no sign of leaking but when I removed them they werent doing much in the way of shock absorbing.

Yeah I am going to replace the shock absorbers, I already have those. Was an advisory on the MOT so I’m sure they are probably worn out. Think I’ll take a punt on the E/F springs , seems the middle ground

There fairly easy to swap over so recon with new shocks and springs its got to be better.

Alasdair

On 24/01/2026 at 22:03, Stanflashman said:

...I’m hoping someone might be able to give me some advice about which rear springs are best for my 2011 Octavia 1.2 TSI estate?

I’ve had the car for a few months and generally it’s been great, but if I have passengers in the back the bottom scrapes going over speed bumps...I’m being told that the correct like for like replacement is part number 1K0511115BD...

If the OEM part number 1K0511115BD is what the car left the factory with, then I suggest going up two in the hierarchy to 1K0511115BF.

If you are going for aftermarket rear springs, then be careful with the selection because different brands will often have different ideas about what the specification of any OEM part number should be. Many aftermarket springs are sold to replace more than one OEM part number, so may be stiffer than the required spring. However, the below three Sachs springs are each listed to replace just one spring each...so should be an exact match.

Have a look at the specification given by Sachs for 1K0511115BD, 1K0511115BE, and 1K0511115BF rear springs. 1K0511115BE is one up in the hierarchy compared to 1K0511115BD, and 1K0511115BF is two up in the hierarchy compared to 1K0511115BD. The increase in wire diameter from 11.25mm to 11.50mm gives an increase in spring stiffness of about 5%, whereas the increase in wire diameter from 11.25mm to 11.75mm gives an increase in spring stiffness of about 10%.

gknautomotive lists the 1K0511115BF rear springs for the Octavia MK2 estate without towbar (front wheel drive including 1.2TSI, NOT 4x4), and gknautomotive lists the 1K0511115BG rear springs for the Octavia MK2 estate with towbar (front wheel drive including 1.2TSI, NOT 4x4).

Sachs rear springs 1K0511115BD

Length 352mm

Wire diameter 11.25mm

https://www.autodoc.co.uk/sachs/1232470#coil-spring

Sachs rear springs 1K0511115BE

Length 348mm

Wire diameter 11.5mm

https://www.autodoc.co.uk/sachs/7059747#coil-spring

Sach rear springs 1K0511115BF

Length 354mm

Wire diameter 11.75mm

https://www.autodoc.co.uk/sachs/1232501#coil-spring

gknautomotive online spring catalogue

https://web.tecalliance.net/gkn/en/home?sessionArticleCountry=GB&sessionTargetCountry=GB

Edited 28 January28 Jan by Carlston

18 hours ago, Carlston said:

If the OEM part number 1K0511115BD is what the car left the factory with, then I suggest going up two in the hierarchy to 1K0511115BF.

If you are going for aftermarket rear springs, then be careful with the selection because different brands will often have different ideas about what the specification of any OEM part number should be. Many aftermarket springs are sold to replace more than one OEM part number, so may be stiffer than the required spring. However, the below three Sachs springs are each listed to replace just one spring each...so should be an exact match.

Have a look at the specification given by Sachs for 1K0511115BD, 1K0511115BE, and 1K0511115BF rear springs. 1K0511115BE is one up in the hierarchy compared to 1K0511115BD, and 1K0511115BF is two up in the hierarchy compared to 1K0511115BD. The increase in wire diameter from 11.25mm to 11.50mm gives an increase in spring stiffness of about 5%, whereas the increase in wire diameter from 11.25mm to 11.75mm gives an increase in spring stiffness of about 10%.

gknautomotive lists the 1K0511115BF rear springs for the Octavia MK2 estate without towbar (front wheel drive including 1.2TSI, NOT 4x4), and gknautomotive lists the 1K0511115BG rear springs for the Octavia MK2 estate with towbar (front wheel drive including 1.2TSI, NOT 4x4).

Sachs rear springs 1K0511115BD

Length 352mm

Wire diameter 11.25mm

https://www.autodoc.co.uk/sachs/1232470#coil-spring

Sachs rear springs 1K0511115BE

Length 348mm

Wire diameter 11.5mm

https://www.autodoc.co.uk/sachs/7059747#coil-spring

Sach rear springs 1K0511115BF

Length 354mm

Wire diameter 11.75mm

https://www.autodoc.co.uk/sachs/1232501#coil-spring

gknautomotive online spring catalogue

https://web.tecalliance.net/gkn/en/home?sessionArticleCountry=GB&sessionTargetCountry=GB

Thanks , really helpful. Is matching wire diameter / length a safe way to work out how close to the OEM part it is? I was looking at these on eBay, not too far off the 1K0511115BF spec you listed above. You think this would be ok?

Took the wheel off to have a look and the spring has white and yellow marks - which I think confirms it is 1K0511115BD.

NAPA NCS1219 appears to be a rebranded KYB RA7099, so identical to that spring.

It should be almost identical to the Sachs rear spring that is sold to replace 1K0511115BF.

The KYB RA7099 is sold to replace 1K0511115BE and 1K0511115BF, but is probably a 1K0511115BF rear spring because KYB couldn't sell a 1K0511115BE rear spring to replace a 1K0511115BF rear spring due to a 1K0511115BE rear spring not being able to support the same axle weight as a 1K0511115BF rear spring.

One white paint mark and one yellow paint mark is a 1K0511115BD rear spring.

NAPA NCS1219 rear springs (probably matches 1K0511115BF) (£31.48 for two)

Length 353mm

Wire diameter 11.75mm

Number of coil turns 8 (as shown in the below KYB RA7099)

https://www.ebay.co.uk/itm/195003151427

When looking for stiffer rear springs for the Octavia MK2 with standard ride height, I first get a list of all of the standard ride height rear springs that are shown in the Octavia MK2 parts catalogue, as shown below. As you can see below, there are twelve rear springs in this hierarchy going from the softest rear spring (1K0511115FT) to the stiffest rear spring (1K0511115BM). The first two springs in this hierarchy aren't listed for the estate or 4x4 versions, only the hatchback version. 1K0511115BD is 4/12 in this hierarchy, and 1K0511115BF is 6/12 in this hierarchy.

Next, I get the specifications for the original spring (that is too soft) and the next two in the hierarchy. Getting a good idea of the specification can often be difficult because different brands will often have different ideas of what the specification of each spring is, and many brands don't give the specification.

Octavia MK2 rear springs (car manufactured until 05.03.2006) (1JA=standard ride height)

1K0511115BC 1JA+0YA

1K0511115BD 1JA+0YB

1K0511115BE 1JA+0YC

1K0511115BF 1JA+0YD

1K0511115BG 1JA+0YE

1K0511115BH 1JA+0YF

1K0511115DE 1JA+0YG

1K0511115DF 1JA+0YH

1K0511115BL 1JA+0YJ

1K0511115BM 1JA+0YK

1K0511115BN 1JA+0YL

1K0511115BP 1JA+0YM

https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/419/5

Octavia MK2 rear springs (car manufactured from 06.03.2006) (1JA=standard ride height)

1K0511115FT 1JA+0YA

1K0511115GA 1JA+0YB

1K0511115BC 1JA+0YC

1K0511115BD 1JA+0YD

1K0511115BE 1JA+0YE

1K0511115BF 1JA+0YF

1K0511115BG 1JA+0YG

1K0511115BH 1JA+0YH

1K0511115DE 1JA+0YJ

1K0511115DF 1JA+0YK

1K0511115BL 1JA+0YL

1K0511115BM 1JA+0YM

https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/663/5

Edited 29 January29 Jan by Carlston

As you can see in the two charts below, if the Octavia MK2 was manufactured before 06.03.2006 build codes 1JA+0YD meant the car came with 1K0511115BF rear springs, but if the Octavia MK2 was manufactured from 06.03.2006 the same build codes meant the car came with 1K0511115BD rear springs.

So what Skoda did from 06.03.2006, was start fitting the cars with rear springs that were two down in the hierarchy, ie. softer rear springs.

If the owner of a later car (manufactured from 06.03.2006) fits stiffer rear springs two up in the hierarchy, they are simply going back to what Skoda used to fit until 05.03.2006.

Octavia MK2 rear springs (car manufactured until 05.03.2006) (1JA=standard ride height)

1K0511115BC 1JA+0YA

1K0511115BD 1JA+0YB

1K0511115BE 1JA+0YC

1K0511115BF 1JA+0YD

1K0511115BG 1JA+0YE

1K0511115BH 1JA+0YF

1K0511115DE 1JA+0YG

1K0511115DF 1JA+0YH

1K0511115BL 1JA+0YJ

1K0511115BM 1JA+0YK

1K0511115BN 1JA+0YL

1K0511115BP 1JA+0YM

Octavia MK2 rear springs (car manufactured from 06.03.2006) (1JA=standard ride height)

1K0511115FT 1JA+0YA

1K0511115GA 1JA+0YB

1K0511115BC 1JA+0YC

1K0511115BD 1JA+0YD

1K0511115BE 1JA+0YE

1K0511115BF 1JA+0YF

1K0511115BG 1JA+0YG

1K0511115BH 1JA+0YH

1K0511115DE 1JA+0YJ

1K0511115DF 1JA+0YK

1K0511115BL 1JA+0YL

1K0511115BM 1JA+0YM

As you can see in the chart below, the aftermarket spring market has a lot of rebranding going on, ie. the same spring is often sold under more than one brand name.

Some springs that should match 1K0511115BF (this isn't a complete list)

Ashika ZCA7099A (same as KYB RA7099)

Bilstein 36-134076 (might be rebranded)

JapanParts ZC7099A (same as KYB RA7099)

Japko ZCJ7099A (same as KYB RA7099)

Kilen 63117 (same as Lesjofors 4285718)

KYB RA7099 (same as NAPA NCS1219)

Lesjofors 4285718 (same as Kilen 63117)

NAPA NCS1219 (same as KYB RA7099)

Sachs 996 653 (same as SKF VKDL 31011)

SKF VKDL 31011 (same as Sachs 996 653)

Edited 29 January29 Jan by Carlston