Official 928 VIN & Option check request thread
1989 S4 Automatic
C02 - 49 state US market car
M28.42 - engine serial # range 81K 05001>10000
A28.16 - transmission serial # range G 2812 1K 00001>10000 (no LSD)
M018 - Sport steering wheel with elevated hub 30mm
I158 - Blaupunkt radio Reno SQR46 - 87-89
M418 - Protective side mouldings
M570 - Rear AC
I586 - Lumbar support - left seat (12 way seat, includes lumbar memory if I537 (positrol) also present)
M650 - Sunroof
I980 - Seat cover - draped leather
I can't read the two Z-orders codes which are the two last with 5 figures.
00321- linen carpet, and
04251, front and back seat piping in leather.
WP0JB0927KS860620
Invoice date 11/15/88
Warranty start date 10/18/89
Production # 1291439
Color: C7- Baltic Blue Metallic
Seats: TW1- Linen/medium blue
Carpet: 2XF- linen
1989 S4 automatic
C02 -49 state US market
M28.42 - engine serial # range 81K 05001>10000
A28.16 - transmission serial # range G 2812 1K 00001>10000 (no LSD)
M018 - Sport steering wheel with elevated hub 30mm
I158 - Blaupunkt radio Reno SQR46 - 87-89
M418 - Protective side moldings
M570 - Rear AC
I586 - Lumbar support - left seat (12 way seat, includes lumbar memory if I537 (positrol) also present)
M650 - Sunroof
I980 - Seat cover - draped leather
WP0JB0927KS860620
Invoice date 11/15/88
Warranty start date 10/18/89
Production # 1291439
Color: C7- Baltic Blue Metallic
Seats: TW1- Linen/medium blue
Carpet: 2XF- linen
1989 S4 automatic
C02 -49 state US market
M28.42 - engine serial # range 81K 05001>10000
A28.16 - transmission serial # range G 2812 1K 00001>10000 (no LSD)
M018 - Sport steering wheel with elevated hub 30mm
I158 - Blaupunkt radio Reno SQR46 - 87-89
M418 - Protective side moldings
M570 - Rear AC
I586 - Lumbar support - left seat (12 way seat, includes lumbar memory if I537 (positrol) also present)
M650 - Sunroof
I980 - Seat cover - draped leather
I still follow this thread and always excited to learn about the various ways our cars were optioned. Those X and Z codes always start a fascinating conversation (and often lead me down the RL rabbit hole reading old threads about them). My car was initially advertised as an “S” then and “S4”. After the first telltales (6600 RPM redline, water temp with numbered markings) this thread is probably the reason I pulled the trigger. Yes, I should’ve probably listened more to the “buy the best one you can afford” advice but that one is in me. The car is overall solid and i’m committed to constant improvement….
I noticed that you recently listed interior codes. Do you have these for 1991 VINs or is this a sporadic thing that just happened to be In the database?. Without the trunk and service book stickers I’ve been trying to confirm mine for a while. I was able to pick a small piece under the reupholstery which I’m pretty sure is classic gray but unsure to what extent (I.e carpet, dash etc - black vs classic gray). If you have those available I’d love to validate for WP0AA2928MS810424.
Thank you again for everything!
Eran
The fun for me is the archaeology of the option codes- not sure _why_ I find it interesting but some people just have the geekout gene.

RE: the interior codes, I have some data for some cars but it's pretty spotty- RE: your '91 GT, this is what I have:
Production number: 1211897
Interior code MX- Classic Gray, faux leather/leather
Seat Combination- APL (Classic Gray, full leather comfort seat, non-heated. If you could still buy a driver's seat for your car from Porsche the full part number would be 928 521 001 86 APL)
Carpet color code 4XR - classic gray carpet
For what it's worth, Porsche published a 'handbook' of interior color codes- I assume there was one for each model year or at least one for each time that they changed the interior color schemes. I only have the '92 version, but it includes Classic Gray. Here are two pages that show what trim piece was what color for a given code:


The fun for me is the archaeology of the option codes- not sure _why_ I find it interesting but some people just have the geekout gene.

RE: the interior codes, I have some data for some cars but it's pretty spotty- RE: your '91 GT, this is what I have:
Production number: 1211897
Interior code MX- Classic Gray, faux leather/leather
Seat Combination- APL (Classic Gray, full leather comfort seat, non-heated. If you could still buy a driver's seat for your car from Porsche the full part number would be 928 521 001 86 APL)
Carpet color code 4XR - classic gray carpet
For what it's worth, Porsche published a 'handbook' of interior color codes- I assume there was one for each model year or at least one for each time that they changed the interior color schemes. I only have the '92 version, but it includes Classic Gray. Here are two pages that show what trim piece was what color for a given code:


the information you provided is super helpful. I did see the words MX come up in one of the VIN searches but wasn’t sure how it affected the dash, consoles, carpets, lower part of door cards etc. I don’t want to peel my otherwise clean white upholstery so now I know what I need.
I’m going to start a search for classic gray trim and carpet. I will likely Re-trim my seats or buy cores and send off to the upholsterer (Roger made a recommendation for Classic 9 which I’ll likely follow).
many thanks!
The Best Porsche Posts for Porsche Enthusiasts
1985 Automatic
C36 - Canadian market
M28.44 - engine serial # range 81F 05001>10000
A28.04 - transmission serial # range 16 F 00001>05000
I158 - Blaupunkt Monterey SQR23 (2 channel)
M418 - Protective side mouldings
M490 - Hi-Fi sound system ( 8 speakers, balance control, 1980-86.5) ("Equipment Group IV")
M494 - Additional Amp (4x15W, 1981+), Blaupunkt BQA-80
M533 - Alarm
M650 - Sunroof
1991 S4 automatic
C02 - 49 state US market
M28.42 - engine serial # range 81 M 50001 >60000
A28.16 - transmission serial # range A 2816 3M 00001>20000
Production number 1211444
Black exterior, black interior
Invoice date 2-5-91
Warranty in-service date 2-20-92
I158 - Blaupunkt Stuttgart 7 649 881 070 1991 only
M418 - Protective side moldings
I498 - Deletion of model designation on rear end
I570 - Rear AC
M650 - Sunroof
92A0800682
1980 Euro (non S)
C00 - German market
000000 - No engine code but should be M28.09, engine serial # range 800 0001>5000
G00000 - No transmission code, but will either be a G28.03 or a G28.05. Transmission serial number range will either be 11 00001>05000 (G28.03), or 11 05001>09999 (G28.05)
M197 - Stronger battery (88 Ah)
M261 - Outside mirror - plain-passenger's side, electrically adjustable and heatable
I288 - Headlight washer
I401 - Light alloy wheels, 'manhole covers
I425 - Rear wiper
M533 - Alarm
M650 - Sunroof




