Genuine Mercedes-Benz Spark Plug – M271 / M272 / M273 / M276 Engines

Specification Overview

Genuine Mercedes-Benz spark plug with a platinum-tipped center and ground electrode for long service life. Manufactured by Bosch (8132) and NGK (PLKR7B8E / 94716) , this is the factory-spec ignition component for a wide range of Mercedes-Benz four-cylinder, six-cylinder, and eight-cylinder petrol engines produced between approximately 2001 and 2015.

• Type: Spark plug with platinum center electrode / platinum ground electrode

• Thread Size: M12 x 1.25

• Thread Length: 26.5 mm (approx.)

• Hex Size: 14 mm (approx.)

• Electrode Material: Platinum (both center and ground)

• Resistance: 1 kOhm interference suppression

• Seat Type: Flat seat with gasket

• OE Numbers: A0041595803, 004-159-58-03, 004.159.58.03, 0041595803

• Previous/Replaced Numbers: A0041594403

• Cross References: NGK PLKR7B8E (94716), Bosch 8132

• Manufacturer: Bosch / NGK (OEM supply)

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Application & Engine Fitment

This spark plug is the factory-spec replacement for a broad range of Mercedes-Benz petrol engines, including M271, M272, M273, and M276 families.

Primary Engine Applications:

⚠️ Important: This spark plug is for petrol engines only. Do not use on diesel engines.

Comprehensive Model Fitment:

⚠️ Important: This spark plug fits 2001–2015 Mercedes-Benz vehicles with factory-fitted part numbers A0041594403 or A0041595803. Always verify by VIN (17-digit chassis number) to ensure correct fitment.

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Service Life & Change Intervals (Technical Data)

Standard Recommended Interval:

• 60,000 km or 4 years – Mercedes-Benz factory recommendation for most M271/M272/M273 engines

• 30,000 miles (approx. 48,000 km) – Recommended for M271 CGI (direct injection) engines

Critical Adjustment for Kampala (Severe Operating Conditions):
The operational climate (ambient temperatures 20°C–40°C), high humidity, stop-and-go urban traffic, and variable fuel quality classify as “Severe Duty” per MB Work Instructions. Platinum spark plugs in turbocharged and high-performance engines experience higher thermal stress and electrode wear under these conditions.

Recommended Replacement Interval under East African operating parameters:

• Maximum: 40,000 km or 3 years (whichever occurs first)

• Frequent short trips / heavy urban use: 30,000 km or 2 years

• Turbocharged units (M271 Kompressor/CGI): 25,000 km recommended due to higher thermal stress

• V8 units (M273): 25,000 km recommended

⚠️ Important: Spark plugs should be replaced as a complete set (4 plugs for 4-cylinder engines, 6 plugs for V6 engines, 8 plugs for V8 engines). Replacing only one or two plugs will cause uneven combustion and potential engine damage.

Failure Symptoms – When to Replace:

• Engine misfires or rough idling

• Check Engine Light illuminated

• Hesitation or loss of power under acceleration

• Poor fuel economy

• Difficulty starting the engine

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Packaging & Pricing (Alps Autoz Kampala)

Often Replaced Together:
For a complete ignition service, replace the following simultaneously:

• Spark plugs (set of 4, 6, or 8, as required)

• Ignition coils (if showing signs of failure)

• Engine air filter (per chassis application)

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Technical Notes for the Workshop

• Gap Setting: Factory pre-gapped. Do not attempt to adjust – platinum electrodes are fragile and can be damaged.

• Torque Specification: 15 Nm – 23 Nm(refer to specific model service manual). Over-tightening can damage the cylinder head; under-tightening can cause heat transfer issues.

• Anti-Seize: Not required on genuine Mercedes-Benz spark plugs.

• Genuine vs. Aftermarket: Genuine MB A0041595803 is manufactured by Bosch and NGK to OEM specifications. Equivalent aftermarket brands:

  • NGK PLKR7B8E (94716)

  • Bosch 8132

  • Champion KER4PYPB

• Storage: Shelf life of 5 years in unopened, sealed packaging. Store in a dry environment away from direct sunlight.

• Compatibility Note: This spark plug is not compatible with M274, M276 (post-2015), M176, M177, OM651, OM642, or any diesel engines. Use only for M271, M272, M273, and selected M276 petrol applications produced up to approximately 2015.

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Alps Autoz – Kampala