Mercedes tensioner pulley idler pulley febi 02248 A6012000770 W124 R129 W140 SL NOS, sealed
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Original febi-bilstein tensioner pulley / idler pulley (febi 02248, Mercedes no. A601 200 07 70) for the poly-V belt of the W124, R129 and W140 model series.
NOS – unused in the original box · 6-rib version with permanently lubricated ball bearing · Fits W124, R129 & W140
Condition of this part
New part (NOS – New Old Stock), unused in the original febi-bilstein box in the old red-and-white design, with original label and seal tape printed "West Germany". The rib profile is sharp-edged with no wear grooves or bright spots, the bearing clean, the seals undamaged and the casting flash untouched. There is only storage dust present; the box shows yellowing, crush marks and edge wear.
Function and location
The pulley guides and supports the poly-V belt, which is driven by the crankshaft to power the alternator, water pump, power steering pump and A/C compressor. It runs freely on a sealed, permanently lubricated deep-groove ball bearing in a plastic body and keeps the belt on track and under tension so it does not flutter, does not jump off and runs with constant preload. As a wear part, a rough- or dry-running bearing leads to grinding and whistling noises in the belt drive; in the final stage the pulley seizes and destroys the belt. Version with 6 ribs, running surface approx. 26 mm, bore approx. 8 mm.
The pulley sits at the front of the engine in the belt drive, bolted to the side of the engine block or to the tensioner arm, and runs with its ribbed side on the inside of the poly-V belt.
How can you tell the tensioner pulley is faulty?
- Grinding or whistling noises in the belt drive that vary with engine speed
- The poly-V belt runs unevenly, flutters or jumps off
- In an advanced stage, the pulley seizes completely and damages or destroys the belt
Compatible vehicles
- Mercedes W124 – 500 E, and after the facelift in 6/1993, E 420 and E 500
- Mercedes R129 SL – 300 SL, from 6/1993 SL 320, and 500 SL and SL 500
- Mercedes W140 S-Class – 400 SE, 400 SEL, S 420, 500 SE, 500 SEL, S 500
- Mercedes C140 coupé – 500 SEC, from 6/1993 S 500 coupé
- The manufacturer febi also lists cross-reference number 601 200 07 70 for numerous other model series (including 190 / W201, E-Class, S-Class, SL, Sprinter, Vito, V-Class, T1, T2, Vario, Unimog) as well as EvoBus and Setra – please check the OE number in advance there
The pulley carries febi number 02248 and Mercedes cross-reference number A601 200 07 70 (or 601 200 07 70).
⚠ Important: compare the part number before buying
The range includes several similar pulleys with neighbouring numbers and different dimensions – please compare carefully before buying.
Does not fit:
- NOT the tensioner pulley 601 200 09 70 for W124 and W201 diesel – a different part despite the neighbouring number
- NOT the idler pulley 601 200 10 70 or INA 532 0027 10 for W124, W140 and W210 – different diameter
- NOT the tensioner pulleys 119 200 09 70 and 119 200 14 70
- No tensioner arm, no tensioner lever and no complete tensioning assembly – only the pulley is sold, without lever, spring, bolt or belt
- Not a smooth, ribless idler pulley – this pulley has a 6-rib profile
- The outer diameter is given in catalogues as 70 to 76 mm – please compare dimensions and rib count with your own part before buying
Does this part fit your car? Send us the VIN (chassis number) and model year – we'll check it for free: 0179 8991069 (Mon–Fri 8 am–6 pm) or via our contact form.
FAQ
Are the tensioner arm or the belt included in the scope of delivery?
No, only the pulley is sold – without tensioner arm, tensioner lever, spring, bolt or belt.
How does this pulley differ from the idler pulley 601 200 10 70?
This tensioner pulley (febi 02248, 601 200 07 70) has a 6-rib profile and a different diameter to the idler pulley 601 200 10 70 or INA 532 0027 10 – please compare before buying.
Does the pulley also fit model series other than W124, R129 and W140?
The manufacturer febi also lists cross-reference number 601 200 07 70 for other model series such as 190 / W201, E-Class, S-Class, SL, Sprinter, Vito, V-Class, T1, T2, Vario and Unimog as well as EvoBus and Setra – please check the OE number in advance here.
Related categories: W124, W140
KFZTeile-Thot specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.
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