in your garage to make future searches easy.

Condition Value
Rear axle first brake drum machining size 7.91 in
expand_moreFront axle brake disc diameter
All Opel gasoline straight-4 1.8 L C 18 XEL engines 10.08 in
All Opel gasoline straight-4 2.0 L C 20 NE engines 10.08 in
All Opel gasoline straight-4 1.8 L X 18 XE engines 10.08 in
All other modifications 9.29 in
expand_moreFront axle brake disc thickness
Variant 1 0.79 in
Variant 2 0.94 in
Variant 1 0.79 in
Variant 2 0.94 in
expand_moreAll other modifications
Internally ventilated brake discs 0.79 in
Otherwise 0.5 in
expand_moreFront axle brake disc minimal thickness
Variant 1 0.67 in
Variant 2 0.83 in
Variant 1 0.67 in
Variant 2 0.83 in
expand_moreAll other modifications
Internally ventilated brake discs 0.67 in
Otherwise 0.38 in
expand_moreFront axle brake lining thickness
With backing plate 0.59 in
expand_moreFront axle brake lining minimal thickness
Without backing plate 0.079 in
expand_moreFront axle brake piston diameter
All Opel gasoline straight-4 1.8 L C 18 XEL engines 2.05 in
All Opel gasoline straight-4 2.0 L C 20 NE engines 2.05 in
All Opel gasoline straight-4 1.8 L X 18 XE engines 2.05 in
All other modifications 1.89 in
Maximum lateral run-out of front axle brake disc 0.0039 in
Rear axle brake disc diameter 10.24 in
Rear axle brake disc thickness 0.39 in
Rear axle minimal brake disc thickness 0.31 in
Rear axle brake drum diameter 7.87 in
expand_moreRear axle brake drum diameter wear limit
2.0 i with gasoline straight-4 2.0 L 114 HP at 5400 RPM, 170 N⋅m at 2600 RPM engine (1993.3–1994.10) 7.91 in
Rear axle brake piston diameter 1.3 in
expand_moreWheel brake cylinder diameter
All Opel gasoline straight-4 1.4 L C 14 SE engines 0.69 in
All Opel gasoline straight-4 1.6 L X 16 SZ engines 0.75 in

Brake system is the most important system in your 1994 Astra Cabriolet. Check pads and disks from time to time and replace them as they worn below minimum thickness allowed by Opel.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 1994 Opel Astra Cabriolet user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Opel warranty policy for your region. In some regions DIY service may invalidate your warranty.

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Opel Astra Cabriolet service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 1994 Opel Astra Cabriolet you're not only saving money, but also also improving your technical skills and learning something new.

1994 Opel Astra Cabriolet generations

In 1994 Opel offered 2 generations of the Astra Cabriolet. Brake system specifications may vary in different generations. Be sure that you are looking at the rigt modification.

Opel Astra Cabriolet F model years

Units:
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