Featured · Cars
VW EA888 Carbon Buildup: What Owners Need to Know
Learn why VW EA888 carbon buildup happens, the symptoms to watch for, when walnut blasting makes sense, and why it is not a fixed service for every owner.
10 min read
Engine guides & articles
In-depth content on engines of all kinds. Search or filter by engine, category, or topic.
Refine articles
38 articles found
Haris Cars knowledge base
Latest guides
Maintenance & ProblemsBMW N47 diesel Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW N47 diesel problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW M54 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW M54 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW N52 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW N52 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW N55 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW N55 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW N54 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW N54 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW S58 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW S58 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW B38 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW B38 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW B58 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW B58 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Maintenance & ProblemsBMW B48 and B46 Common Problems: What Fails and What to Check
A practical, evidence-led guide to BMW B48 and B46 problems, warning signs, diagnosis and the checks that matter before spending money.
9 min read
Engine GuidesMercedes-AMG M177 and M178 Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Mercedes-AMG M177 and M178: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read- Engine Guides
Mercedes OM651 diesel Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Mercedes OM651 diesel: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read 
Engine GuidesMercedes OM606 diesel Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Mercedes OM606 diesel: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read- Engine Guides
Mercedes M274 Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Mercedes M274: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read 
Engine GuidesMercedes M254 and M264 Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Mercedes M254 and M264: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read
Engine GuidesAudi EA837 3.0 TFSI Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Audi EA837 3.0 TFSI: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read- Engine Guides
Audi EA839 3.0 TFSI Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Audi EA839 3.0 TFSI: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read 
Engine GuidesAudi DAZA Engine Deep Dive: What Makes This Five-Cylinder Special
A complete guide to the Audi DAZA 2.5 TFSI: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read
Engine GuidesVolkswagen EA211 TSI Engine Guide: Specs, Reliability and Ownership Reality
A complete guide to the Volkswagen EA211 TSI: design, applications, reliability, common problems, maintenance priorities and used-buying advice.
9 min read