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Replacement Shock Absorbers
Vehicle Types:
911 Carrera (993)/911 Carrera S (993)
911 Carrera 4 (993)/911 Carrera 4S (993)
911 Targa (993)
Model Year:
As of 1994 up to 1998
Subject:
Replacement shock absorbers (strut inserts)
Information:
Shock absorber for the respective chassis no longer available
Notes:
During repairs, the faulty shock absorber will be replaced by a new shock absorber of similar design.
The functional dimensions of the new shock absorber are the same as the shock absorber that is installed as standard equipment.
The shock absorbers MUST always be replaced on both sides of the axle or completely (front and
rear axle) in the case of the lowered chassis (M-no. 033).
The following tables show the respective vehicles with the possible chassis variants, and the corresponding shock absorbers required for replacement.
Please check this when ordering parts! For further information: see Porsche Electronic Parts Catalog
(PET).
Standard:
The standard chassis (M-no. M029)/touring suspension (M032 – ONLY for USA) was installed on the
911 Carrera 2/4 and 911 Targa.
Front axle
Standard Part No. – Approved
Manufac- Part numbers (replacement)
turer
993.343.041.03/.042.03 – worldwide Boge
993.343.041.37/.042.37 – worldwide Monroe
993.343.041.40/.042.40 – Shock absorber,
left/right (1 x), color: green
Rear axle
993.333.051.00/.052.00 – worldwide Boge
993.333.051.14/.052.14 – ONLY for
USA
Boge
993.333.051.34/.052.34 – worldwide Monroe
Sport:
993.333.051.38 – Shock absorber(2 x), color:
green
Also use: 993.333.073.04 – Suspension/stabilizer (2 x)
The sport suspension (M030; front axle: – 10 mm, rear axle: – 20 mm) was ONLY installed on the
911 Carrera, 911 Carrera S/4S coupés (M491 = Turbo Look).
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Front axle
Standard Part No. – Approved
Manufac- Part numbers (replacement)
turer
993.343.041.04/.042.04 – worldwide Boge
993.343.041.35/.042.35 – worldwide Monroe
993.343.041.39/.042.39 – Shock absorber,
left/right (1 x), color: red
Rear axle
993.333.051.12/.052.12 – Rest of the Boge
world (RoW)
Lowered:
993.333.051.13/.052.13 – USA
Boge
993.333.051.35/.052.35 – RoW
Monroe
993.333.051.36/.052.36 – USA
Monroe
993.333.051.39 – Shock absorber(2 x), color:
red
Also use: 993.333.073.04 – Suspension/stabilizer (2 x)
The lowered chassis (M033; front axle: – 10 mm, rear axle: – 20 mm) was ONLY installed on the 911
Carrera and 911 Targa including the S models (M491) in the “Rest of the world (RoW)” market.
Front axle
Standard Part No. – Approved
Manufac- Part numbers (replacement)
turer
993.343.041.07/.042.07 – RoW
Boge
993.343.041.38/.042.38 – RoW
Monroe
993.343.041.39/.042.39 – Shock absorber,
left/right (1 x), color: red
ONLY together with:
•
•
965.343.531.02.504 – Coil spring (2 x
for front axle)
Parts included for rear axle (see below)
Rear axle
993.343.051.02/.052.02 – RoW
Boge
993.343.051.37/.052.37 – RoW
Monroe
993.333.051.39 – Shock aborber(2 x), color:
red
ONLY together with:
•
•
•
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993.333.531.11.504 – Coil spring (2 x
for rear axle)
993.333.073.04 – Suspension/stabilizer
(2 x)
Parts included for front axle (see above)
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Parts List:
Figure 1
Parts required for front axle:
993.343.041.401
1x
Shock absorber assembly, left - colur: green (not shown)
993.343.042.401
1x
Shock absorber assembly, right – color: green  Figure 1 -1-
993.343.041.392 3
1x
Shock absorber assembly, left – color: red (not shown)
993.343.042.392 3
1x
Shock absorber assembly, right – color: red  Figure 1 -1-
993.343.505.01
2x
Bellows-type protective tube * Figure 1 -5-
900.380.005.09
8x
Hexagon nut, M8 * (supporting mount, not shown)
965.343.531.02.5043
1x
Coil spring, set * – color coding: orange/green (not shown)
Front-axle shock absorber assembly always comprises:
1x
Shock absorber, left (not shown) or right ( Figure 1 -1-)
964.343.502.03
1x
Lock nut – lower (color: black)  Figure 1 -2-
964.343.503.02
1x
Adjusting nut – upper (color: black)  Figure 1 -3-
999.084.441.09
1x
Hexagon nut, M14 x 1.5 – DIN 985  Figure 1 -4-
———
* Must be ordered seperately.
1
Standard chassis (M-no. M029)/touring suspension (M032 – ONLY for USA)
2
Sport suspension (M030)
3
Lowered chassis (M033)
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Figure 2
Parts required for rear axle:
993.333.051.381
2x
993.333.051.392 3
2x
Shock absorber assembly, left/right – color: green  Figure 2
-1Shock absorber assembly, left/right – color: red (not shown)
993.343.505.01
2x
Bellows-type protective tube * Figure 2 -7-
993.333.073.04
2x
Suspension/stabiliser * Figure 2 -8-
993.333.531.11.5043
2x
Coil spring, set * – color coding: brown (not shown)
900.380.005.09
8x
900.380.008.01
4x
Hexagon nut, M8 * DIN EN 1664 (supporting mount, not
shown)
Hexagon nut, M10 * (suspension/stabilizer, not shown)
Rear-axle shock absorber assembly always comprises:
———
1x
Shock absorber ( Figure 2 -1-)
993.333.504.81
1x
Concave washer (lock nut, silver)  Figure 2 -2-
964.333.105.82
1x
Additional spring, plastic  Figure 2 -3-
999.025.230.03
1x
Concave washer, 14 x 48 x 3.5  Figure 2 -4-
993.333.466.81
1x
Sleeve  Figure 2 -5-
999.084.445.0B
1x
Hexagon nut, M12 x 1.25 – DIN 985  Figure 2 -6-
* Must be ordered seperately.
Spare Parts:
All parts specified with a Porsche part number in the Parts List are available separately as spare parts
(see also Porsche Electronic Parts Catalog – PET).
Tools:
V.A.G 1752 - Tensioning device for spring struts or commercially available tensioning device
V.A.G 1332 - Torque wrench, 40-200 Nm (30-148 ftlb.)
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9647 - Hook wrench or commercially available hook wrench
Shop light
Work Procedure: 1
Preparatory work
1.1
Position the vehicle on the lifting platform and lift it.
1.2
Remove faulty spring strut including second spring strut on the other side of the vehicle.
1.2.1
Front axle  Workshop Manual 40 8519 Removing front spring strut.
ONLY for vehicles with lowered chassis (M033): Also remove spring struts on
rear axle!
1.2.2
Rear axle  Workshop Manual 42 7119 Removing rear spring strut.
ONLY for vehicles with lowered chassis (M033): Also remove spring struts on
front axle!
2
Convert and install spring strut for front axle.
2.1
Measure dimension X1 (top of adjusting
nut/mounting point for shock absorber
Figure 3 -X1-) on the standard spring
strut.
1
2
3
4
X1
–
–
–
–
Standard shock absorber
New shock absorber
Adjusting nut
Mounting point for shock absorber
– Dimension of top of adjusting
nut/mounting point for shock
absorber
Figure 3
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2.2
Adjust dimension X2 (top of adjusting
nut/mounting point for shock absorber
 Figure 4 -X2-) in accordance with dimension X1 (standard spring strut).
1
2
3
4
5
X1
X2
2.3
–
–
–
–
Standard shock absorber
New shock absorber
Adjusting nut
Mounting point for shock absorber
– Lock nut
– Dimension of top of adjusting
nut/mounting point for shock
absorber (standard spring strut)
– Dimension of top of adjusting
nut/mounting point for shock
absorber (new spring strut)
Secure lock nut ( Figure 4 -5-) to adjusting nut ( Figure 4 -3-).
Figure 4
Tightening torque 50 Nm (37 ftlb.) +/-5 Nm (+/-3.5 ftlb.)
2.4
2.5
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Disassemble faulty spring strut ( Workshop Manual 4085 Disassembling front
spring strut) and assemble new spring
strut as shown in Figure 5 ( Figure 5 ).
1
2
3
4
5
–
–
–
–
–
6
–
7
8
9
10
11
12
–
–
–
–
–
–
13
14
–
–
Shock absorber(new)
Lock nut (new)
Adjusting nut (new)
Concave washer (lower, re-use)
Coil spring (re-use, ONLY for
lowered chassis: new)
Bellows-type protective tube
(new)
Concave washer (upper, re-use)
Spacer sleeve (re-use)
Supporting mount (re-use)
Hexagon nut, M8 (new)
Nut, M14 x 1.5 (new)
Seal (perform visual inspection,
use new seal if necessary)
Push-on connector for ABS line (re-use)
Wear indicator clip (re-use)
Figure 5
Convert new spring strut for the other side of the vehicle in the same way.
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Information
Visually inspect supporting mount seal for damage/material properties and replace it if
necessary.
2.6
Install both spring struts  Workshop
Manual 40 8519 Installing front spring
strut (front axle, right:  Figure 6 ).
1
2
3
4
5
6
–
–
–
–
–
–
Coil spring
Bellows-type protective tube
Shock absorber
Concave washer (lower)
Adjusting nut
Lock nut
ONLY for vehicles with lowered chassis
(M033): Also install spring struts on rear
axle (see Step 3)!
3
Convert and install spring strut for rear axle.
Figure 6
3.1
Measure dimension X1 (spring plate –
lower/bushing for shock absorber 
Figure 7 -X1-) on the standard shock absorber.
1
2
3
4
X1
–
–
–
–
–
Standard shock absorber
New shock absorber
Spring plate – lower
Bushing for shock absorber
Dimension of spring plate
(lower)/bushing for shock
absorber
Figure 7
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3.2
Adjust dimension X2 (spring plate –
lower/bushing for shock absorber
 Figure 8 -X2-) in accordance with
dimension X1 (standard spring strut).
1
2
3
4
5
X1
X2
– Standard shock absorber
– New shock absorber
– Spring plate – lower = Concave
washer (lock nut, silver)
– Bushing for shock absorber
– Joint bearing
– Dimension of lower spring
plate/bush for shock absorber
(standard spring strut)
– Dimension of lower spring
plate/bush for shock absorber
(new spring strut)
Figure 8
3.3
Prepare shock absorbers for installation
(left/right side of vehicle  Figure 9).
1
2
3
X
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– Joint bearing
– Spring plate – lower = Concave
washer (lock nut, silver)
– Bushing for shock absorber
– Dimension = 21°
3.3.1
Loosen joint bearing slightly
from the concave washer (lock
nut, silver  Figure 9 -2-).
3.3.2
Adjust dimension X = 21° as
required ( Figure 9).
3.3.3
Screw concave washer (lock nut, silver  Figure 9 -2-) hand-tight to the joint
bearing ( Figure 9 -1-).
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Figure 9
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Disassemble faulty spring strut ( Workshop Manual 4271 Disassembling rear
spring strut) and assemble new spring
strut as shown in Figure 10 ( Figure 10
).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3.5
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– Shock absorber (new)
– Concave washer (lock nut, silver
– new)
– Coil spring (re-use, ONLY for
lowered chassis: new)
– Additional spring, plastic (new)
– Bellows (new)
– Concave washer, 14 x 48 x 3.5
(new)
– Sleeve (new)
– Plate (re-use)
– Intermediate piece,
3.0/5.5/8.0 mm (re-use)
– Supporting mount (re-use)
– Hexagon nut, M8, DIN EN 1664 (new)
– Stop plate (re-use)
– Hexagon nut, M12 x 1.25 (new)
– Suspension/stabilizer (new)
– Hexagon nut, M10 (new)
Figure 10
Convert new spring strut for the other side of the vehicle in the same way.
NOTICE
Incorrect adjustment of joint bearing for shock absorber on rear axle
•
Joint bearing can break
•
Joint bearing touching axle support

Check joint bearing settings (21° and height)!

Fit shock absorbers without tension in the vehicle.

Check that shock absorbers are working perfectly (compression/rebound) before driving!
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3.6
Install both spring struts, see also 
Workshop Manual 42 7119 Installing rear
spring strut.
1
2
3
4
5
6
– Coil spring
– Concave washer (lock nut, silver)
– Joint bearing
– Shock absorber
– Suspension/stabilizer
– Anti-roll bar
3.6.1
Loosely pre-fit left/right spring
strut at the relevant installation
position in the vehicle.
Loosen concave washer (lock
nut) slightly if necessary and
turn joint bearing/shock abFigure 11
sorber slightly into position so
that it is connected without tension to the body/steering knuckle.
3.6.2
Secure concave washer (lock nut) to joint bearing.
Tightening torque 100 Nm (74 ftlb.)
NOTICE
Suspension/stabilizer fitted incorrectly
•
Joint bearing can break

Always fit suspension/stabilizer in such a way that the threaded bolt is facing the
other side of the vehicle.
3.6.3
4
Fit new suspension/stabilizer as shown in Figure 11 ( Figure 11 ).
Concluding work
4.1
Perform complete suspension alignment  Workshop Manual 440503 Suspension
alignment, complete
Adjustment values  Workshop Manual 4405 Adjustment values for suspension alignment
4.2
Remove vehicle from lifting platform.
40 85 20 00:
–Removing and installing front spring strut (2 x)–
40 90 20 50:
–Removing and installing front shock absorber (2 x)–
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Labor time: 150 TU
Labor time: 90 TU
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Labor time: 160 TU
42 71 20 00:
–Removing and installing rear spring strut (2 x)–
42 72 20 50:
–Removing and installing rear coil spring (2 x)–
44 95 03 00:
–Performing suspension alignment at front and rear–
Labor time: 100 TU
44 95 15 50:
–Adjusting vehicle at front and rear–
Labor time: 200 TU
Labor time: 80 TU
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. If a particular condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your authorized Porsche Dealer for the latest information
about whether a particular technical bulletin applies to your vehicle. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify the current and
correct part numbers. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS
Tester are the ones that must be followed.
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distinctive shapes of the Porsche automobiles such as, the federally registered 911 and Boxster automobiles. The third party trademarks contained herein are the properties of their respective owners.
Porsche Cars North America, Inc. believes the specifications to be correct at the time of printing. Specifications, performance standards, standard equipment, options, and other elements shown are
subject to change without notice. Some options may be unavailable when a car is built. Some vehicles may be shown with non-U.S. equipment. The information contained herein is for internal authorized
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