Boxster Rear Plastic Window Cracked

A Critical Issue on Porsche Boxster 986 cars, made before 2003, is when their Boxster Rear Plastic Window becomes CRACKED.

Porsche produced the original Boxster with a plastic rear window. The limitations for the use of the rear plastic window are quite high because of “cold crack”, scratching problems, and the oxidation of the plastic (yellowing).

In 2003 Porsche upgraded the Boxster to a glass rear screen, however, Porsche changed the pattern at the same time making it impossible to upgrade the old cars with the new convertible top from Porsche.

Although it is possible to both retrofit a new convertible top with a rear glass window or even a glass rear window in place of the rear plastic window on the pre-2003 Porsche Boxster 986. We have multiple articles on this at Boxstertips.

Boxster 986 Rear Window
Boxster 986 Rear Window

1.0 Not recommended to lower the 986 top in real cold weather

Be very careful when opening your convertible top in cold weather. The colder the weather the more prone your plastic rear window is apt to crack.

Newer windows are very pliable but age sees the rear plastic windows get brittle and inflexible.

Never use your convertible top below 40°F or 5°C!

2.0 Boxster Chop

All owners of a 986 with a rear plastic window need to learn the “Boxster Chop”. You need to get your black belt in this critical defensive maneuver.

When you do lower the top, open the top enough to start the rear window folding then get out of the car and do a ‘chop’ with your arm/hand and make a nice even crease/fold in the window so when you open the top all the way the window doesn’t develop a compound fold/crease.

The “Boxster Chop” is recommended in all weather conditions as a defensive measure.

What is the Boxster Chop?!?

Many 986 owners opt to get a new canvas top, complete with a new glass window. If you’re looking to buy an early Boxster 986, please keep in mind this upgrade and the costs involved.

compatible with Porsche Boxster Convertible Top With Plastic Window Black Canvas Cloth(1997-2002)
16 Reviews
compatible with Porsche Boxster Convertible Top With Plastic Window Black Canvas Cloth(1997-2002)
  • 1 Year Warranty
  • Canvas Cloth
  • Window: 50 Gauge Heavey Plastic window like the original
  • This top comes completely assembled and ready to install. No sewing is required
compatible with Porsche Boxster 986 1997-2002 Convertible Top With Heated Glass Window Canvas Cloth (Black)
32 Reviews
compatible with Porsche Boxster 986 1997-2002 Convertible Top With Heated Glass Window Canvas Cloth (Black)
  • Canvas Cloth
  • DOT Approved Heated Glass Window.
  • This top comes completely assembled and ready to install. No sewing is required.
  • Our tops are Brand new in the original box.

All Boxster Forum Sites will have multiple dedicated threads on this issue and offer many solutions for resolution.

Please note that Replacing the Convertible Roof is Project 70 in the 101 Projects for Your Porsche Boxster.

3.0 From Amazon

Bestseller No. 1
PMFCA 98656127902 2pcs Convertible Top Push Rod Ball Joint Repair Fits for 1997-2012 Porsche Boxster
3 Reviews
PMFCA 98656127902 2pcs Convertible Top Push Rod Ball Joint Repair Fits for 1997-2012 Porsche Boxster
  • Fits Part Numbers: REPP351802 / 98656127902 / 98756127900 / 9875
  • Push Rod Repair Ball Joint- Plastic- Pair [RH and LH]
  • This Brand New Convertible Top Rod built according to the highest standards of quality and precise specifications.
  • 1-year, unlimited-mileage warranty
Bestseller No. 2
Convertible Soft Top Compatible with Porsche 1997-2002 Boxster & Boxster S 986 2Door - With Plastic Window Canvas Black Stayfast Cloth
  • Fitment: Compatible with Porsche 1997-2002 Boxster & Boxster S 986 Convertible 2 Door. Please confirm your car model before purchasing to avoid that the purchased product is not suitable for your car.
  • Features: The Soft Top is made of reinforced canvas + plastic, which is resistant to high temperatures and will not turn yellow. Strict stitching technology can prevent rain, wind and sun. In addition, the visibility of the windows is particularly good.
  • Trustworthy Quality: Every component is strictly screened and analyzed during manufacturing. The top does not require sewing and is fully assembled and ready to be installed.
  • Package included: 1 x Soft Top with Plastic Window. This product is made of reinforced Canvas + Plastic Window, waterproof and dust proof, excellent performance, can provide long service life.
  • Installation: Mounting Hardware NOT Included. Instructions NOT included. Screw, clip mounting mode. Professional installation is strongly recommended.
Bestseller No. 3
Convertible Top Transmission Gear (Teeth Left to Right) for Porsche Boxster 1997-2006 | OEM# 987-561-179-01G | Heavy Duty
14 Reviews
Convertible Top Transmission Gear (Teeth Left to Right) for Porsche Boxster 1997-2006 | OEM# 987-561-179-01G | Heavy Duty
  • Heavy Duty Replacement Part
  • Brand New Like OEM
  • Fast and Free Shipping w/ Friendly Customer Service | 1 Year Warranty
  • Teeth Angle Left to Right
Bestseller No. 4
Soft Top Push Rod - 986 987 Boxster Convertible Ball Joint OEM Repair Kit
50 Reviews
Soft Top Push Rod - 986 987 Boxster Convertible Ball Joint OEM Repair Kit
  • Repair Kit Includes: 2 X Pors 986 987 Boxster Convertible Top Push Rod Ball Joint
  • The Plastic used is the mixture of glass fiber which i heat resistance and durable.
  • Pors che Applications: Boxster (1997-2012)
SaleBestseller No. 5
Top Transmission Gears L+R Side Compatible With Porsche Boxster Convertible 1997-2012 98756118001
13 Reviews
Top Transmission Gears L+R Side Compatible With Porsche Boxster Convertible 1997-2012 98756118001
  • Top Transmission Gears L+R Side Compatible With Porsche Boxster Convertible 1997 to 2012 98756118001
  • OEM Numbers (Only for Comparison): 98756118001
  • Compatibility: Porsche Boxster Convertible 1997 to 2012
  • Important: Please compare your parts with the pictures before purchasing an item.
  • Package Included: 1x Top Transmission Gear Set (L+R)
Bestseller No. 6
Kojem Convertible Soft Top Compatible with 1997-2002 Porsche Boxster & Boxster S 986 2Door Black Canvas with Plastic Window
  • FITMENT: Compatible with Porsche 1997-2002 Boxster & Boxster S. Please confirm your car model before purchasing to avoid that the purchased product is not suitable for your car.
  • FEATURE: Color: Black; Material: Canvas+Plastic; Made of high quality of Canvas and Plastic, which is resistant to rain, wind and sun, can be adapted to any weather and environment the whole year.
  • EXCELLENT VISIBILITY: With excellent visibility, you can clearly see the scenery outside the vehicle. Tight stitching technology makes the product more durable.
  • INSTALLATION: No instruction but easy to install. Professional installation is recommended. Mounting Hardware is not included. Screw, clip mounting mode.
  • PACKAGE INCLUDE: One Soft Top with Plastic Window. Instruction and Mounting Hardware are not included.
Bestseller No. 7
Sierra Auto Tops Convertible Top Replacement for Porsche Boxster 1997-2002, German Acoustic A5 Canvas, Black
15 Reviews
Sierra Auto Tops Convertible Top Replacement for Porsche Boxster 1997-2002, German Acoustic A5 Canvas, Black
  • Upgraded German A5B/DS Acoustic Cloth / Canvas for superior sound dampening
  • Entire top is cut from the same bolt of cloth for consistent color and pattern
  • New DOT rated heated glass window with embedded defroster wiring
  • Includes the wiring harness to connect the defroster window to electrical system
  • Flush mounted deck seams like original and unique to these Boxsters
Bestseller No. 8
compatible with Porsche Boxster Convertible Top With Plastic Window Black Canvas Cloth(1997-2002)
16 Reviews
compatible with Porsche Boxster Convertible Top With Plastic Window Black Canvas Cloth(1997-2002)
  • 1 Year Warranty
  • Canvas Cloth
  • Window: 50 Gauge Heavey Plastic window like the original
  • This top comes completely assembled and ready to install. No sewing is required
Bestseller No. 9
compatible with Porsche Boxster 986 1997-2002 Convertible Top With Heated Glass Window Canvas Cloth (Black)
32 Reviews
compatible with Porsche Boxster 986 1997-2002 Convertible Top With Heated Glass Window Canvas Cloth (Black)
  • Canvas Cloth
  • DOT Approved Heated Glass Window.
  • This top comes completely assembled and ready to install. No sewing is required.
  • Our tops are Brand new in the original box.

4.0 From the Internet:

Top 5 Recommended Boxster Web Forums (Excellent Resource for repairs and advice)

6SpeedOnline – Rear window ripped, now what?

PedrosBoard – Rear window replacement question for 986

Neil from Road And Race
Boxstertips - 13 Convertible Tips for Porsche Boxsters
Boxstertips – 13 Convertible Tips for Porsche Boxsters

Also, be sure to check out our “Best Of” Series:

Last update on 2022-10-01 / Affiliate links / Images from Amazon Product Advertising API